The volume of a beaker is 65.0 mL. What is the volume of
water that you need to fill up the beaker in cubic centimeters?

Answer:80%

Explanation:Total C in terrestrial ecosystems is approximately 3170 gigatons (GT; 1 GT = 1 petagram = 1 billion metric tons). Of this amount, nearly 80% (2500 GT) is found in soil (Lal 2008).

Answer:

See attached picture.

Explanation:

Hello.

In this case, since the synthesis of amides via anhydride requires its reaction with the N-radical primary amine, as it is required to yield N-methylpropanamide, the reactants must be propanoic anhydride and methylamine in order to yield the aforementioned amide as well as propanoic acid as a side product.

This reaction is shown on the attached picture.

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Oil and water.

Lemon juice and tea.

Honey and tea.

Milk and chocolate.

Coffee and cream.

Cream and sugar.

Flour and butter.

Cereal and milk.

Answer:

oil ,water lemon juice and tea coffee an cream honey and tea milk and chocolate these are mixtures

Answer:

40

Explanation:

120/30=40

Answer:

c

Explanation:

Physical Weathering is process that occurs when repeated freezing and thawing breaks apart rocks

Answer:

Throughout the liquid state, certain forces are encountered by the aforementioned molecules:  

Explanation:

The molecules in ice and liquid water have the same kinetic energy. Liquid water has a greater entropy than ice and the liquid water has a greater potential energy than ice. The correct option is D.

Kinetic energy is the energy that an object or particulate has as a result of its motion.

When work, which converts energy, is performed on an object by applying a net force, the object accelerates and gains kinetic energy.

Potential energy is the energy that an object has as a result of its location in relation to other objects.

Potential energy is frequently associated with restoring forces such as a spring or gravity.

Ice and liquid water molecules have the very same kinetic energy. Liquid water has more entropy than ice, and it also has more potential energy than ice.

The correct answer is D.

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Your question seems incomplete, the complete question may be:

Correct statements about samples of ice and liquid water at 0∘ C include which of the following ?

(P) Molecules in ice and liquid water have the same kinetic energy.

(Q) Liquid water has a greater entropy than ice.

(R ) Liquid water has a greater potential energy than ice

Answer:

If the prime factors of a number are grouped in triples of equal factors, then that number is called a perfect cube. In order to check whether a number is a perfect cube or not, we find its prime factors and group together triplets of the prime factors. If no factor is left out then the number is a perfect cube.

Explanation:

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of copper = 2.62 cm³

density = 8.96 g/cm³

We have

mass = 8.96 × 2.62 = 23.4752

We have the final answer as

Hope this helps you

Answer:

See explanation

Explanation:

In putting up prospective structures for the compounds, we must consider the tetra valency of carbon. Again you must read the description carefully before drawing each structure.

In each of the proposed structures, the number of atoms present must reflect the condensed structural formula given in the question.

Proposed structures for each chemical specie in the question are shown in the images attached.

Answer:

A Intrusive

Explanation:

I go to K12 and they say that's the answer

Answer:

Measure the absorbance for the same solution at different wavelengths and find the maximum absorbance.

Explanation:

To obtain the wavelength of maximum absorption, many different wavelengths must be passed through a solution and the corresponding absorption is measured for each wavelength.

The wavelength at which the maximum absorption occurs is known as the wavelength of maximum absorption. This is the wavelength st which the experiment should be performed.

Answer:

The chemical formula is Cr(BrO3)3.

The chemical formula formed between chromium (III) and bromate ion is Cr(BrO3)2.

A chemical formula is an formula for the atoms in compound which are arranged in a fixed proportion.

The chemical formula of salt is NaCl. The chemical formula of sodium bicarbonate is NaHCO3. The chemical formula of chromium bromate is Cr(BrO3)2.

The molecular mass of chromium bromate is 435. 7027. The valency of chromium in chromate ion is 2. The atomic number of chromium is 24. The atomic number of bromine is 35. Bromine contain seven valence electrons.

Therefore, The chemical formula formed between chromium (III) and bromate ion is Cr(BrO3)2.

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Answer:

50

Explanation:

so you'll have to apply Newton's 2nd law which is F=ma and then substitute the values that you already have in the question as in, the force is 200 and you'll have to find the acceleration by working it out which is 4m/s² and then find the mass by dividing 200 by 4 so the actual mass is 50kg ✌️❤️

Taking into account the Newton's second law, the mass of the cart is 50 kg.

You have to know that Newton's second law states that this force will change the speed of an object because the speed and / or direction will change. These changes in velocity are called acceleration.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object.

Mathematically, Newton's second law is expressed as:

F= m×a

where:

Acceleration relates the changes in velocity with the time in which they occur. So:

[tex]a=\frac{final velocity - initial velocity}{time}[/tex]

In this case:

Replacing in the expression for Newton's Second Law:

200 N= m× 4 m/s²

Solving:

m= 200 N÷4 m/s²

m= 50 kg

Finally, the mass of the cart is 50 kg.

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Answer:

(1) separate the substances

(2) chemically combine the substances

(3) determine the freezing point of the mixture

(4) predict the electrical conductivity of the mixture

Explanation:

Answer: I think the best answer from the choices listed above is option 1. Two substances in a mixture differ in density and particle size. These properties can be used to separate the substances. These properties can be manipulated in order to have a better separation between the two substances.

Answer: 177

Explanation:

The reaction yields 177g of Na.

The balanced equation is

2NaN₃ → 2Na + 3N₂

Either use the mass of NaN₃ or of N₂ to calculate the mass of Na.

By making the following conversions:

mass of NaN₃ → moles of NaN₃ → moles of Na → mass of Na

500 g NaN₃ × [tex]\frac{1 mol NaN_{3} }{65.01 g NaN_{3} }[/tex] = 7.69 mol NaN₃

7.69 mol NaN₃ × [tex]\frac{2 mol Na}{2 mol NaN_{3} }[/tex] = 7.69 mol Na

7.69 mol Na × [tex]\frac{22.99 g Na}{1 mol Na}[/tex] = 176.8 g Na = 177g of Na

By making the following conversions:

mass of N₂ → moles of N₂ → moles of Na → mass of Na

323.20 g Na ×[tex]\frac{2 mol N_{2} }{28.01 g N_{2} }[/tex] = 11.539 mol N₂

11.539 mol N₂ × [tex]\frac{2 mol Na}{3 mol N_{2} }[/tex]  = 7.692 mol Na

7.692 mol Na × [tex]\frac{22.99 g Na}{1 mol Na}[/tex] = 176.85 g Na = 177g of Na

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Answer:

Explanation:

Given that;

The chemical equation for the reaction is:

[tex]\text {4NH}_3(g) +\text {5O}_2(g) }[/tex] ↔ [tex]\text {4NO}(g) +\text {6H}_2O}(g) }[/tex]

a). [tex]\Delta H^0 = \sum \Delta H^0_{reactant \ bonds \ broken} + \sum \Delta H^0_{product \ bonds \ formed}[/tex]

Using average bond energies;

For Bonds broken, we have:

4 × 3 N - H = 12 mol × 391 kJ/mol = 4692 kJ

5 × O = O = 5 mol × 498   kJ/mol =  2490 kJ    

         [tex]\mathbf{ \sum \Delta H^0_{reactant \ bonds \ broken} }[/tex]   = 7182  kJ

For Bonds formed, we have:

4 × N = O = 4 mol × - 607 kJ/mol = -2428 kJ

6 × 2 O - H = 12 mol × - 467 kJ/mol = - 5604 kJ

         [tex]\mathbf{ \sum \Delta H^0_{product \ bonds \ formed} }[/tex]      = - 8032 kJ

Therefore;

[tex]\mathbf{ \Delta H^o = 7182 kJ + (- 8032 \ kJ)}[/tex]

[tex]\mathbf{ \Delta H^o =-850 \ kJ}[/tex]

b) Using Standard heats of formation;

[tex]\Delta H^0 = \sum m \Delta H^0_f (products) = \sum n \Delta H^0_f (reactants)[/tex]

[tex]\Delta H^0 = [ 4 \ mol \times \Delta H^0_f \ (NO(g)) + 6\ mol \times \Delta H^0_f(H_2O)] - [ 4 \ mol \times \Delta H^0_f \ (NH_3(g)) + 5 \ mol \times \Delta H^0_f \ (O_2)][/tex]

[tex]\Delta H^0 = [ 4 \ mol \times90.29 \ kJ/mol + 6\ mol \times -241.826 \ kJ/mol - [ 4 \ mol \times-45.9 \ kJ/mol + 5 \ mol \times 0][/tex]

[tex]\mathbf{\Delta H^0 = -906.196 \ kJ}[/tex]

c) The value of ΔH^o, calculated using average bond energies, is only considered to be an estimate of the standard enthalpy change for the reaction because there is a premise in the calculation that all the bonds broken in the reactant and all bonds are formed in products. Meanwhile, only little bonds are broken, and only little bonds are formed during the reaction.

The given example is a good description of the phenomena is:

Anorexia is an eating disorder which makes a person to feel that any extra food is going to cause him to become obese and because of this, he would reduce his intake of food.

As a result of this, they tend to get some health issues as a result of their refusal to eat certain foods or even eat at all. This is evident in the given example of John refusing to eat an extra slice of cake after having a huge meal at his favorite restaurant.

Therefore, the correct answer is option D

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Answer:

Carbon dioxide and oxygen

Explanation:

Answer: 3.4 atoms

Explanation: hope this helps you!!

Answer:

C

Explanation: I mL = 1 cm3 and 1 L = 1000 mL so 1 L - 1000 cm3

Answer:

d

Explanation:

Answer:

where's the diagram?

Explanation:

the best answer is student A

Answer:

-9+6-(-2)

-9+6+2

-9+8

-1 is the answer

Explanation:

Answer:

less than 45 cm, as the ball transforms some of its potential eneregy to termal energy and sound energy

Answer:

fractional distillation

Explanation:

Answer:

0.4774 KJ/K.mol

Explanation:

We are told that the transition at 25.0°C occurs in three steps. Steps i, ii and iii.

Thus;

the entropy of unfolding of lysozyme = ΔS_i + ΔS_ii + ΔS_iii

Now,

C_p,m(unfolded protein) = C_p,m(folded protein) + 6.28 kJ/K.mol

Now, for the first process, ΔS_i is given as;

ΔS_i = C_p,m × In(T2/T1)

We are given;

T1 = 25°C = 25 + 273.15K = 298.15 K

T2 = 75.5°C = 75.5 + 273.15 K=348.65 K

Thus;

ΔS_i = C_p,m × In(348.65/298.15)

Now, for the third process, ΔS_iii is given as;

ΔS_iii = (C_p,m + 6.28 kJ/K.mol) × In(T1/T2)

Thus;

ΔS_iii = (C_p,m + 6.28 kJ/K.mol) × In(298.15/348.65)

Now, we don't know C_pm. So, we have to find a way to eliminate it. We will do it by rewriting In(298.15/348.65) in such a way that when ΔS_iii is added to ΔS_i, C_p,m will cancel out. Thus;

In(298.15/348.65) can also be written as;

In(348.65/298.15)^(-1) or

- In(348.65/298.15)

Thus;

ΔS_iii = - [(C_p,m + 6.28 kJ/K.mol) × In(298.15/348.65)]

Now, let's add ΔS_iii to ΔS_i to get;

ΔS_i + ΔS_iii = [C_p,m × In(348.65/298.15)] + [(-C_p,m - 6.28 kJ/K.mol) × In(348.65/298.15)]

ΔS_i + ΔS_iii = [C_p,m × In(348.65/298.15)] - [C_p,m × In(348.65/298.15)] - [6.28In(348.65/298.15)]

First 2 terms will cancel out to give;

ΔS_i + ΔS_iii = -6.28In(348.65/298.15)

ΔS_i + ΔS_iii = -0.9826 KJ/K.mol

Now,for process ii;

ΔS_ii = standard enthalpy of transition/Transition Temperature

Thus;

ΔS_ii = (509 KJ/K.mol)/348.65

ΔS_ii = 1.46 KJ/K.mol

Thus;

the entropy of unfolding of lysozyme = ΔS_i + ΔS_ii + ΔS_iii = -0.9826 + 1.46 = 0.4774 KJ/K.mol

Answer:

a. c= silver/ 234J(kg/K) > b. c= water/ 4190 J(kg/K) > c. c= glass/ 754J/(kg.K)

Explanation:

Hello.

In this case, since the heat resulting from the temperature change for an specified amount of a substance is defined via:

[tex]Q=mCp\Delta T[/tex]

Since the specific heat is related to amount of energy required to raise the temperature of 1 kg of a substance by 1 °C, we can infer that the higher the specific heat, the higher the required energy as they are in a directly proportional relationship. Moreover, since the specific heat and the change in temperature are in an inversely proportional relationship, we can infer that the higher the specific heat, the lower the temperature change, therefore, we can rank the substances follows:

a. c= silver/ 234J(kg/K) > b. c= water/ 4190 J(kg/K) > c. c= glass/ 754J/(kg.K)

It means that silver will produce the largest temperature change, next water and finally glass since silver has the smallest specific heat next water and finally glass.

Best regards.

Answer:

The distance the truck traveled is 190

Explanation:

I added 30, 45, 50, 65 together to get the total distance