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3 years ago

When work is done on an object, the amount of ________ it has changes.

Chemistry

1 answer:

arsen [322]3 years ago

3 0

Hey there!

When work is done on an object, the amount of energy it has changes.

Hope this helps!

~Autumly

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What is meant by the term compound? Provide an example

PIT_PIT [208]

Answer:

I hope it helps

Explanation:

When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of its atoms. When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.Chemical Formula: Compounds are represented by their chemical formula. A chemical formula is a symbolic representation of the proportions of atoms that constitute a particular chemical compound.The chemical formula of water is H2O which shows two atoms of hydrogen and one atom of oxygen have combined to form one molecule of H2O. The chemical formula for common salt is NaCl which shows one atom of sodium and one atom of chlorine combine to form one molecule of NaCl.

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3 years ago

Which word means the opposite of boiling melting

Nina [5.8K]

Freezing could be a good answer

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3 years ago

Which statement best describes the density of an atom's nucleus?

patriot [66]

Answer:

D. The nucleus occupies very little of the volume but contains most of its mass

Explanation:

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3 years ago

Calculate the equilibrium constant Kp for this reaction, given the following information (at 299 K ): 2NO(g)+Br2(g)⇌2NOBr(g)Kc=2

Travka [436]

Answer:

$2NO_{(g)}+Br_2_{(g)}\rightleftharpoons2NOBr_{(g)}$ , Kp = 0.08967

$2NO_{(g)}\rightleftharpoons N_2_{(g)}+O_2_{(g)}$ , Kp = 2.3×10³⁰

Explanation:

The relation between Kp and Kc is given below:

$K_p= K_c\times (RT)^{\Delta n}$

Where,

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

$2NO_{(g)}+Br_2_{(g)}\rightleftharpoons2NOBr_{(g)}$

Given: Kc = 2.2

Temperature = 299 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(2+1) = -1

Thus, Kp is:

$K_p= 2.2\times (0.082057\times 299)^{-1}$

Kp = 0.08967

For the second equilibrium reaction:

$2NO_{(g)}\rightleftharpoons N_2_{(g)}+O_2_{(g)}$

Given: Kc = 2.3×10³⁰

Temperature = 299 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(2) = 0

Thus, Kp is:

$K_p= 2.2\times (0.082057\times 299)^{0}$

Kp = 2.3×10³⁰

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3 years ago

Question 27

katrin [286]

Answer:

3.83x10^23

Explanation:

number of moles of co2 is 0.636364

but number of molecules = number of moles times 6.02x10^23

4 0

3 years ago