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notka56 [123]
3 years ago
9

A mixture of iron and sulfur can be separated by attracting the Iron particles with a magnet. If the iron and sulfur mixture is

heated strongly, iron (II) sulfide forms, which is no longer magnetic and cannot be separated by
physical methods. What is Iron (II) sulfide?
A heterogeneous mixture
B. compound
C. homogeneous mixture
D. element
Chemistry
1 answer:
kicyunya [14]3 years ago
8 0

Answer:B

Explanation: It is a compound

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Initially, [NH3(g)] = [O2(g)] = 3.60 M; at equilibrium [N2O4(g)] = 0.60 M. Calculate the equilibrium concentration for NH3.
natima [27]

The question is incomplete, here is the complete question:

Consider the reaction  4NH_3(g)+7O_2(g)\rightarrow 2N_2O_4(g)+6H_2O(g)

Initially, [NH_3(g)]=[O_2(g)] = 3.60 M; at equilibrium [N_2O_4(g)]=0.60M  . Calculate  the equilibrium concentration for NH_3

<u>Answer:</u> The equilibrium concentration of ammonia is 2.8 M

<u>Explanation:</u>

We are given:

Initial concentration of [NH_3(g)] = 3.60 M

Initial concentration of [O_2(g)] = 3.60 M

For the given chemical equation:

                     4NH_3(g)+7O_2(g)\rightarrow 2N_2O_4(g)+6H_2O(g)

Initial:               3.60        3.60            

At eqllm:      3.60-4x     3.60-7x           2x             6x

We are given:

Equilibrium concentration of [N_2O_4(g)] = 0.60 M

Evaluating the value of 'x'

\Rightarrow 2x=0.60\\\\\Rightarrow x=\frac{0.60}{2}=0.2

So, equilibrium concentration of NH_3=(3.60-4x)=(3.60-(4\times 0.2))=2.8M

Hence, the equilibrium concentration of ammonia is 2.8 M

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3 years ago
What is the speed of a 6-kg bowling ball that has 30 J of kinetic energy?
Katyanochek1 [597]

Answer: 2700J

Explanation:

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3 years ago
A sample of metal has a mass of 16.5916.59 g, and a volume of 5.815.81 mL. What is the density of this metal
Oxana [17]

Answer:

=> 2.8554 g/mL

Explanation:

To determine the formula to use in solving such a problem, you have to consider what you have been given.

We have;

mass (m)     = 16.59 g

Volume (v) =  5.81 mL

From our question, we are to determine the density (rho) of the rock.

The formula:

p = \frac{m}{v}

Substitute the values into the formula:

​p = \frac{16.59 g}{5.81 mL} \\   = 2.8554 g/mL

= 2.8554 g/mL

Therefore, the density (rho) of the rock is 2.8554 g/mL.

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False is the correct answer.
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