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4 years ago

Which of the following statements holds true for a chemical change

2 answers:

7 0

A chemical change takes place when reactants are consumed and converted into a product which is different in composition and characteristics from the initial compounds.

shusha [124]4 years ago

6 0

A chemical change is when the change is unseen. In other words, the change is between the bonds, which changes the substance completely.

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The equilibrium constant for the chemical equation N2(g)+3H2(g)↽−−⇀2NH3(g) N 2 ( g ) + 3 H 2 ( g ) ↽ − − ⇀ 2 NH 3 ( g ) is Kp =

I am Lyosha [343]

Answer:

$K_c=312.13$

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:

$N_2_{(g)}+3H_2_{(g)}\rightleftharpoons 2NH_3_{(g)}$

Given: Kp = 0.174

Temperature = 243 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T = (243 + 273.15) K = 516.15 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(3+1) = -2

Thus, Kp is:

$0.174= K_c\times (0.082057\times 516.15)^{-2}$

$K_c\frac{1}{1793.83764}=0.174$

$K_c=0.174\times \:1793.83764$

$K_c=312.13$

5 0

3 years ago

isotopes of an element will always have the same a. number of protons. b. number of neutrons. c. number of electrons. d. mass.

Nastasia [14]

Your answer is same number of protons

3 0

3 years ago

The movement of fluids up and down in a cycle because of convection is_____

kirill [66]

Called a(n) convection current

5 0

3 years ago

How many total of atoms are in 0.370gr of P2O5

Irina-Kira [14]

142 g ---------------- 6.02 x 10²³ molecules
0.920g g ------------ ( molecules )

molecules = 0.920 x ( 6.02 x 10²³ ) / 142

molecules = 5.53 x 10²³ / 142

= 3.89 x 10²¹ molecules

1 molecule P2O5 -------------------------- 7 atoms
3.89 x 10²¹ molecules -------------------- ( atoms )

atoms = ( 3.89 x 10²¹) x 7 / 1

atoms = <span>2.72 x 10²² atoms of P2O5

Hope this helps!!!
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8 0

3 years ago

Based on your understanding of how bond types influence a material’s properties, identify each of the following compounds as bei

vfiekz [6]

Answer:

Steel: metallic

Propane: covalent

Calcium chloride: ionic

Water: covalent

Explanation:

7 0

3 years ago

Read 2 more answers