Using The Tools And Knowledge Of Science To Solve A Problem Or Build New Technology Is Called... (2024)

Chemistry College

Answers

Answer 1

Answer:

Invention

Explanation:

Scientific ideas can be applied in novel was to solve new scientific problems and create new technology. This process helps to make life easier and better.

The application of scientific knowledge to solve new problems and create new technology is generally referred to as invention.

Related Questions

0.400 mole of sucrose, C 12H 22O 11, contains ________ C atoms.

Answers

Answer:

2.89x10²⁴ atoms of Carbon are contained in 0.400 moles of sucrose

Explanation:

The formula of sucrose is C₁₂H₂₂O₁₁, that means per mole of sucrose you will have 12 moles of carbon. In 0.400 moles of sucrose you will have:

0.400 moles Sucrose * (12 moles C / 1 mole Sucrose) = 4.8 moles of Carbon

To convert moles to atoms you must use Avogadro's number (1 mole contains 6.022x10²³ atoms):

4.8 moles Carbon * (6.022x10²³ atoms / 1 mole) =

2.89x10²⁴ atoms of Carbon are contained in 0.400 moles of sucrose

0.4 mole of sucrose, C₁₂H₂₂O₁₁ contains 2.89×10²⁴ carbon atoms

How to determine the mole of carbon

1 mole of C₁₂H₂₂O₁₁ contains 12 mole of C.

Therefore,

0.4 mole of C₁₂H₂₂O₁₁ will contain = 0.4 × 12 = 4.8 mole of C

How to determine the atoms of carbon

From Avogadro's hypothesis,

1 mole of C = 6.02×10²³ atoms

Therefore,

4.8 mole of C = 2.89×10²⁴ atoms

Thus, 0.4 mole of sucrose, C₁₂H₂₂O₁₁ contains 2.89×10²⁴ carbon atoms

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The fire extinguisher is the best piece of safety equipment to put out a fire on your

clothing

O True

O False

Answers

I think the answer is False.

h. Identity of unknown metal

Answers

Answer:

you can identify an unknown substance by measuring its density and comparing your results to a list of known densities. Density=mass/volume. Assume that you have to identify an unknown metal. You can determine the mass of the metal on a scale.

what is true that if at the same temperature 2 objects have equal masses, but different densities

Answers

Answer:

The two objects have different volumes.

Explanation:

The density of an object measures how closely packed the mass in the object is. Density of an object is obtained by taking the ratio of the mass of an object and its volume.

Density = mass/volume

The mass present in an object is constant, but the volume may vary with temperature. The volume of substances generally increases with temperature, therefore, density decreases with increase in volume.

Two objects at the same temperature having equal masses may or may not have the same density depending on the volume each object occupy.

If two substances are at the same temperature and have equal masses but different densities, then they must have different volumes.

(100 POINTS AND BRAINLYEST)
Sea level is the height of the ocean’s surface. Why do sea level change?

Question 4 options:

sea level changes due to many different geological events and can rise or fall over time.

sea level changes because aquatic populations rise and fall displacing the water,

sea level changes because of El Nino’

sea level changes because the earth’s magnetic field fluctuates

Answers

Answer:

B

Explanation:

Sea level changes due to many different geological events and can rise or fall over time .

What are the causes of change in sea level change ?

Sea level changes due to global warming , the water being added to the seas as the glaciers melts due to global warming and the expansion of water when it warms.

The sea level also increases due to land processes like soil erosion ,oil and ground water pumping.Changes in land water storage like dams ,changes in global precipitation patterns also make a significant contribution to change in sea level.

The increased emission of green house gases is a dominant cause for change in sea level.Fifty percent of sea level rise is due to thermal expansion of seas and the rest is due to the geological activities.

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The ionization energy of carbon (C) is:________.
I. smaller than that of fluorine (F)
II. larger than that of fluorine (F)
because: ________.
III. Carbon has less electrons and less electron-electron repulsion making it easier to remove an electron from carbon.
IV. The effective nuclear charge of carbon is smaller, so the valence electrons feel a weaker pull from the nucleus.
V. In carbon, the electron being removed is closer to the nucleus.
VI. In carbon, the electron being removed is farther from the nucleus.

Answers

Explanation:

Ionization energy refers to the minimum amount of energy required to remove the valence electron of an isolated neutral gaseous atom or molecule. Generally, ionization energy increases from left to right across the periodic table.

This means that the ionization energy of Carbon would be smaller than that of Fluorine. The reason for this is due to the smaller effective nuclear charge.

The effective nuclear charge and the atomic size are two factors that ionization energy depends on.

The correct option is;

IV. The effective nuclear charge of carbon is smaller, so the valence electrons feel a weaker pull from the nucleus.

Which type of rock is a foliated metamorphic rock?

A. granite
B. marble
C. quartzite
D. slate

Answers

Answer:

D. Slate

Explanation:

Because when it come to think of it then you see that slate is arranged with many parallel layers just like a foliated metamorphic rock.

P.S I took the test and got a 100

Slate is a type of foliated metamorphic rock formed when rocks are subjected to heat,high pressure,etc.

What are metamorphic rocks?

Metamorphic rocks are defined as a type of rock which is substantially changed from igneous or sedimentary rocks.They are formed when rocks are subjected to high heat, pressure,hot minerals and even combination of these factors.

Metamorphic rocks are formed by the process of metamorphism which does not melt the rocks rather they are transformed into denser and compact rocks.

New minerals are created by the rearrangement of of minerals or by the reaction of fluids withe the rocks.Metamorphic rocks are often smeared and folded.

Common metamorphic rocks are marble,gneiss,quartzite ,etc.There are two types of metamorphic rocks :foliated and non-foliated metamorphic rocks.

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Number of electrons absorbed by the main energy level (n = 4):
a)8
b)18
c)32
d)56

Answers

Answer:

C

Explanation:

Because 2 x n square gives the total energy level been absorbed = 2 x16

=32

Draw the products formed when 2−propanol [(CH3)2CHOH], the main ingredient of rubbing alcohol, is treated with H2SO4.

Answers

Answer:

Explanation:

Elimination reaction occurs when 2−propanol [(CH3)2CHOH] is treated with H2SO4, this is because the H2SO4 is a dehydrating agent. With concentrated tetraoxosulphate (VI) acid at 180°C, 2 - propanol reacts to form a conjugate acid and a conjugate base.

The reaction formation and the products can be seen in the attached image below.

What is the name of the element that has 20 protons in the its nucleus ? *

Answers

Answer:

Calcium.

Explanation:

Calcium has an atomic number in the periodic table equivalent to 20.

Good luck, hope this helped!

Where are the most reactive elements on the periodic table? What makes one element more reactive than another?

Answers

These elements are located in the upper right and lower left corners of the periodic table and in certain element groups. The halogens, alkali metals, and alkaline earth metals are highly reactive. The most reactive element is fluorine, the first element in the halogen group.

Draw the conjugate acid of ethanol

Answers

Answer:

H₃O⁺.

Explanation:

Hello,

In this case, ionization of ethanol yields hydrogen cations and ethoxide anions as follows:

[tex]CH_3COOH+H_2O\rightleftharpoons H_3O^++CH_3COO^-[/tex]

Which is at equilibrium as ethanol is a weak acid. Thus, since the conjugate acid is formed by the outgoing H⁺ and the water, we say that the conjugate acid is then the hydroxonium ion, H₃O⁺ whereas the conjugate base is the remaining anion CH₃COO⁻.

Best regards.

What is the molality of a solution made by dissolving 3.71 g of sodium chloride in 0.535 L of water?

Answers

Answer:

Molality of the solution is 0.119 mol/kg

Explanation:

Molality is the type of concentration that indicates the moles of solute in 1 kg of solvent.

As we assume water's density as 1 g/mL, we need to calculate the mass of water (our solvent).

We convert 0.535 L to mL → 0.535 L = 535 mL

By the way, water's mass is 535 g.

We convert the mass from g to kg → 535 g = 0.535kg

We need to calculate the moles of solute, NaCl.

3.71 g . 1mol / 58.45 g = 0.0635 mol

Molality = mol/kg → 0.0635 mol / 0.535kg = 0.119 m

Suppose that 10.0 mol C2H6(g) is confined to 4.860 dm3 at 27 °C. Predict the pressure exerted by the ethane from (i) the perfect gas and (ii) the van der Waals equations of state. Calculate the compression factor based on these calculations. For ethane, a = 5.507 dm6 atm mol−2, b = 0.0651 dm3 mol−1.

Answers

Answer:

[tex]P=35.16[/tex]

[tex]Z=4.6[/tex]

Explanation:

Hello,

In this case, since the VdW equation is:

[tex]P=\frac{nRT}{V-n*b}-a(\frac{n}{V} )^2[/tex]

Since the moles are 10.0 moles, the temperature in K is 300.15 K and the volume is liters is also 4.860 L (1 dm³= 1L), the pressure exerted by the ethane is:

[tex]P=\frac{10.0mol*0.082\frac{atm*L}{mol*K}*300.15K}{4.860mol-10.0mol*0.0651\frac{L}{mol} }-5.507\frac{atm*L^2}{mol^2}(\frac{10.0mol}{4.86L} )^2\\\\P=58.48atm-23.3atm\\\\P=35.16[/tex]

Thus the compression factor turns out:

[tex]Z=\frac{PV}{RT}=\frac{23.3atm*4.86L}{ 0.082\frac{atm*L}{mol*K}*300.15K}\\\\Z=4.6[/tex]

Regards.

what are limitations of an egg without the shell but has a very thin layer holding it all together

Answers

Answer:

As a hen ages, the eggs that she lays get gradually larger. However, the calcium content deposited in the shell remains the same despite the size of the egg. So the eggshells become thinner as the hen ages.

Explanation:

An air conditioning unit turns off once it reaches its goal temperature. The house warms up and the air conditioning unit turns on again.

When the air conditioning unit turns on, it is an example of:

A)input

B)process

C)output

D)feedback

Answers

Answer:

D) feedback.

Explanation:

An air condtioning unit consists of the following elements according to available choices:

Inputs: Refrigerant, air from surroundings, electricity.

Process: Refrigeration cycle.

Output: Conditioned air at goal temperature.

Feedback: Activation and deactivation of the air conditioning unit depending on indoor temperature.

When the air conditioning turns on and off to keep goal temperature indoors, a control stage consisting in a controller and a action element is acting to reverse the behavior of the process with a view to keep goal temperature.

Hence, correct answer is D.

At liftoff, a space shuttle uses a solid mixture of ammonium perchlorate and aluminum powder to obtain great thrust from the volume change of solid to gas. In the presence of a catalyst, the mixture forms solid aluminum oxide and aluminum chloride and gaseous water and nitrogen monoxide.A. Write a balanced equation for the reaction, assign oxidation states for all atoms, and identify the reducing and oxidizing agents.B. How much aluminum oxide can you make when you react 150.0 g of ammonium perchlorate with 50.0 g of powdered aluminum

Answers

Answer:

A) 3NH₄ClO₄ + 3Al ---> Al₂O₃ + AlCl₃ + 6H₂O + 3NO

B) 150 g of ammonium perchlorate will produce 43.4 g of aluminum oxide

Explanation:

A)Balanced equation of reaction:

3NH₄ClO₄ + 3Al ---> Al₂O₃ + AlCl₃ + 6H₂O + 3NO

Oxidation states:

Nitrogen, N: from -3 to +2

Hydrogen, H: from +1 to +1

Chlorine, Cl: From +7 to -1

Oxygen, O: from -2 t0 -2

Aluminum, Al: from 0 to +3.

Oxidizing agent is ammonium perchlorate while the reducing agent is the aluminum powder.

B) molar mass of aluminum oxide = 102 g/mol; molar mass of ammonium perchlorate =117.5 g/mol

From the equation of reaction 3 moles of ammonium perchlorate reacts with 3 moles of aluminum to produce 1 mole of aluminum oxide;

that is 3 * 117.5 g of ammonium perchlorate reacts with 3 * 27 g of aluminum to produce 102 g/mol of aluminum oxide

150 g of ammonium perchlorate will react with (150 * 3*27) / (3 * 117.5) of aluminum = 34.47 g of Al

Ammonium perchlorate is the limiting reactant.

150 g of ammonium perchlorate will produce (150 * 102)/(3*117.5) g of aluminum oxide = 43.4 g of aluminum oxide

The branch of science that deals with chemicals and bonds are called chemistry. Chemistry deals with the physical and chemical behavior of the element.

The correct answer to the question is [tex]3NH_4ClO_4 + 3Al ---> Al_2O_3 + AlCl_3 + 6H_2O + 3NO[/tex]

B) 150 g of ammonium perchlorate will produce 43.4 g of aluminum oxide

What is the balanced reaction?A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.

Oxidation states:Nitrogen, N: from -3 to +2Hydrogen, H: from +1 to +1Chlorine, Cl: From +7 to -1Oxygen, O: from -2 t0 -2Aluminum, Al: from 0 to +3.

The oxidizing agent is ammonium perchlorate while the reducing agent is the aluminum powder.

B) molar mass of aluminum oxide = 102 g/mol; molar mass of ammonium perchlorate =117.5 g/mol. From the equation of reaction 3 moles of ammonium perchlorate reacts with 3 moles of aluminum to produce 1 mole of aluminum oxide;

That is[tex]3 * 117.5[/tex] g of ammonium perchlorate reacts with [tex]3 * 27[/tex]g of aluminum to produce 102 g/mol of aluminum oxide. 150 g of ammonium perchlorate will react with [tex]\frac{(150 * 3*27) }{ (3 * 117.5)}[/tex] of aluminum = 34.47 g of Al

Ammonium perchlorate is the limiting reactant.

150 g of ammonium perchlorate will produce (150 * 102)/(3*117.5) g of aluminum oxide

= 43.4 g of aluminum oxide.

Hence, the correct answer is 4.34g.

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Determine which physical conditions are necessary to support nuclear fusion and formation of stars.

Answers

Answer:

The correct approach will be "Increased gravitational attraction".

Explanation:

The increased gravitational attraction seems to be the natural or physical phenomenon that is required to promote nuclear reactions including star formation. This is much more important to establish stars at different temperatures (lower) and greater magnetic pull as well as nuclear fusion tends to happen.

A chef is testing out new iron cookware. He knows that iron has a specific heat of
445 J/kg°C. He heats a 2 kg iron skillet on stove for 5 minutes and finds that the
temperature of the iron skillet has increased by 250°C. What change in
temperature will the Chef observe when he heats his 4 kg iron skillet on the same
stove for the same amount of time?
A. An increase of 125°C
B. An increase of 250°C
C. An increase of 325°C
O D. An increase of 445°C

Answers

B is the best answer

He knows that iron has a specific heat of 445 J/kg°C. He heats a 2 kg iron skillet on stove for 5 minutes and finds that the temperature of the iron skillet has increased by 250°C An increase of 250°C change in temperature will the Chef observe when he heats his 4 kg iron skillet on the same stove for the same amount of time.

What is specific heat ?

Specific heat can be defined as the measurable amount of heat needed to increase the temperature of one gram of a substance by one degree Celsius of temperature.

The units of specific heat can be represented as calories or joules per gram per Celsius degree where as 1 calorie per gram per Celsius degree.

Specific heat capacity= Heat quantity/ mass × change in temperature.

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Sulfuric acid is: ___________
a) a homogeneous mixture,
b) a compound,
c) an atom,
d) a heterogeneous mixture
e) an element

Answers

Answer:

D

Explanation:

two different types of elements combine to form an acid

where is the fulcrum of this lever? circle and label its location on the diagram above

how do you balance the object on the measurement tray?​

Answers

Answer:

Explanation:

1) A fulcrum is a pivot point that plays a central role (not necessarily located at the center) in a lever. The fulcrum of the attached picture has been circled (in blue).

2) The object placed on this lever's measurement tray is balanced by placing it at the center of the tray. This is the standard way of placing objects on any balance.

The fixed point on the rigid bar around which the machine (lever) can turn is called the fulcrum. It refers to the support that the lever rotates around. For instance, the midway or support is where the rod will pivot in the case of a common balance.

1) A fulcrum is a pivot point that plays a crucial (but not always essential) role in a lever. The accompanying image's fulcrum has been highlighted in blue with a circle.

2) By putting it in the middle of the measurement tray for this lever, the object is balanced. The norm for placing items on any balance is in this manner.

The pivotal point of the beam is known as the fulcrum. A load is applied at the other end of a lever when an effort is exerted on one end of the lever.

The fulcrum can be shown as follows:

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uppose you are titrating an acid of unknown concentration with a standardized base. At the beginning of the titration, you read the base titrant volume as 2.04 mL. After running the titration and reaching the endpoint, you read the base titrant volume as 20.95 mL. What volume, in mL, of base was required for the titration?

Answers

Answer:

18.91 ml

Explanation:

Initial volume of base=2.04 ml

Final volume of base = 20.95 ml

Volume of base used= 20.95 - 2.04 = 18.91 ml

Note that the volume of base used is obtained as the difference between the final and initial volume of base, hence the answer given above.

How many atoms of Oxygen are in 5H2PO3? A. 15 B. 8 C. 12

Please help!!

Answers

Answer:

15 atoms

Explanation:

plz mark as brainliest

Which two parts of the atom are found in nucleus?

Answers

Answer:

protons and neutrons are found in nucleus

Question 2
Status: Not yet answered Points possible: 1.00
A graduated cylinder contains 10.00 mL water. A 14.74g piece of aluminum is added to the water, and the volume rises to 15.46
mL. What is the density of the aluminum in g/mL?
Type answer

Answers

Answer:

[tex]\rho = 2.7g/mL[/tex]

Explanation:

Hello,

In this case, given that the density for a material es defined via its mass and volume:

[tex]\rho =\frac{m}{V}[/tex]

We first need to compute the volume of aluminum in this case, since it comes from the volume of cylinder and the volume of the cylinder with the aluminum:

[tex]V=15.46 mL-10.00mL\\\\V=5.46mL[/tex]

In such a way, the density turns out:

[tex]\rho=\frac{14.74g}{5.46mL}\\ \\\rho = 2.7g/mL[/tex]

Best regards.

When of a certain molecular compound X are dissolved in of dibenzyl ether , the freezing point of the solution is measured to be . Calculate the molar mass of X. If you need any additional information on dibenzyl ether, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to significant digit.

Answers

This question is incomplete, the complete question is;

When 4.28 g of a certain molecular compound X are dissolved in 60.0 g of dibenzyl ether [(C₆H₅CH₂)₂0] , the freezing point of the solution is measured to be -3.2°C . Calculate the molar mass of X.

If you need any additional information on dibenzyl ether, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to significant digit.

Answer: molar mass of solute (X) is 88.03 g/mol

Explanation:

Given that;

mass of solute = 4.28 g

mass of solvent = 60.0 g = 0.060 kg (Dibenzyl ether)

depression constant kf = 6.17 °CKg/mol

Freezing Point of solvent T₀ = 1.80°C (Dibenzyl ether)

freezing point of solution Tsol = -3.20°C

Now we know that

Depression in freezing point ΔTf = depression constant kf × molaity m

and (ΔTf = T₀-Tsol)

so T₀ - Tsol = kf × m

we substitute

1.80 - (-3.20) = 6.17 × m

5 = 6.17 × m

m = 5 / 6.17

m = 0.8103 kg/mol

so molaity m = 0.8103 kg/mol

we know that

Molaity of solute m = (mass of solute / M.wt of solute) × ( 1 / mass of solvent in Kg)

solve for molar mass of solute

molar mass of solute = (mass of solute / molaity) × ( 1 / mass of solvent in Kg)

now we substitute

molar mass = (4.28g / 0.8103 kg/mol) × (1 / 0.060kg)

molar mass = ( 5.2839 × 16.66 ) g/mol

molar mass = 88.0297 g/mol ≈ 88.03 g/mol

Therefore molar mass of solute (X) is 88.03 g/mol

The last group on the periodic table is called the noble gases. The elements in this group are
all gases and are unreactive. Which property causes the noble gases to be unreactive?
A. atomic radius
B. atomic weight
C. full valence electron configuration
D. structure of the nucleus

Answers

Answer:

C

Explanation:

They are stabil and full of valence electron.

Considering the definition and properties of noble gases, a full valence electron configuration causes the noble gases to be unreactive. (option C)

Noble gases

Noble gases or inert gases are known as the set of chemical elements that constitute group 18 (VIIIA) of the Periodic Table of the elements.

Reactivity of noble gases

Noble gases have a very low chemical reactivity. This is because they have a complete valence shell that gives them a low tendency to capture or release electrons. For this reason they have also received the name of inert gases or rare gases.

In other words, the electronic configuration of the noble gases is that their outermost shell or valence shell is always complete, without the need to accept or give up electrons. Then they are in a state of maximum stability.

Because all chemical transformations involve valence electrons, noble gases do not participate in chemical reactions to form chemical compounds, since they are very stable on their own.

Summary

In summary, a full valence electron configuration causes the noble gases to be unreactive. (option C)

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please help 13 points!!! cell wall chloroplasts mitochondria small vacuoles eukaryote cells How would you change the characteristics in this list, to describe the cells of organisms in the PLANT kingdom? A) remove mitochondria B) change eukaryote to prokaryote C) change cell wall to cell membrane D) change small vacuole to large central vacuole

Answers

Answer:

A.

Explanation:

It’s just right

Calculate the amount of C in 0.600g of CO2.

Answers

Answer: Since one molecule of CO2 contains one molecule carbon atoms, therefore, 0.6 molecule of carbon dioxide will contain 0.6 molecule of carbon.

Mass of C in 0.6 molecule of CO2

Explanation

= No. Of molecule × molar mass

= 0.6× 12gm

=7.2gm

Methanol, a potential replacement for gasoline as an automotive fuel, can be made from H2 and CO by the reaction
CO(g) + 2H2(g) CH3OH(g)
At 500.0 K, this reaction has Kp = 6.25 x 10-3. Calculate ?

Answers

Answer:

[tex]\Delta G=-48.2kJ/mol[/tex]

Explanation:

Hello,

In this case, considering that the relationship between Kp and K is:

[tex]K=\frac{Kp}{RT^{\Delta \nu}}[/tex]

Whereas the change in the number of moles (stoichiometric coefficients) is:

[tex]\Delta \nu=1-2-1=-2[/tex]

The equilibrium constant is:

[tex]K=\frac{6.25x10^{-3}}{(8.314\frac{J}{mol\times K}*500.0K)^{-2}}\\\\K=1.08x10^{5}[/tex]

In such a way, the Gibbs free energy of reaction is:

[tex]\Delta G=-RTln(K)=-8.314\frac{J}{mol\times K}*500.0K*ln(1.08x10^5)\\\\\Delta G=-48.2kJ/mol[/tex]

Regards.

Using The Tools And Knowledge Of Science To Solve A Problem Or Build New Technology Is Called... (2024)

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