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3 years ago

ANALYZE A ball of clay is manipulated into different shapes in each of the images

Chemistry

1 answer:

alekssr [168]3 years ago

7 0

Answer:

The amount of mass and matter in all the transformations of the clay ball will remain the same or constant

Explanation:

From the law of conservation of mass we have, for an enclosed system to and from which there is no transfer of matter or energy, mass cannot be created nor destroyed, and remains constant at the given value, but the matter which make up the mass can be changed into different forms

Therefore, the clay ball can be transformed into different shapes and will still posses the same initial mass before the transformation, provided there are no transfer of matter or energy from the clay ball system.

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g Suppose a 49. L reaction vessel is filled with 1.5 mol of NO. What can you say about the composition of the mixture in the ves

irakobra [83]

The question is incomplete, the complete question is:

At a certain temperature, the equilibrium constant $K_{eq}$ for the following reaction is 0.74:

$NO_3(g)+NO(g)\rightleftharpoons 2NO_2(g)$

Suppose a 49.0 L reaction vessel is filled with 1.5 mol of $NO_3$ and 1.5 mol of NO. What can you say about the composition of the mixture in the vessel at equilibrium?

A. There will be very little $NO_3$ and NO.

B. There will be very little $NO_2$

C. Neither of the above is true.

Answer: The correct option is B. there will be very little $NO_2$

Explanation:

We are given:

Initial moles of $NO_3$ = 1.5 moles

Initial moles of NO = 1.5 moles

Volume of vessel = 49 L

As, moles of reactants and moles of products are equal, the volume term will not appear in the equilibrium constant expression.

Equilibrium constant for the reaction = 0.74

For the given chemical equation:

$NO_3(g)+NO(g)\rightleftharpoons 2NO_2(g)$

Initial: 1.5 1.5 -

At eqllm: 1.5-x 1.5-x 2x

The expression of equilibrium constant for the above reaction:

$K_{eq}=\frac{[NO_2]^2}{[NO_3]\times [NO]}$

Putting values in above equation, we get:

$0.74=\frac{(2x)^2}{(1.5-x)(1.5-x)}\\\\x=-1.13, 0.451$

Neglecting the negative value of equilibrium constant because concentration cannot be negative

Equilibrium concentration of $NO_3$ = (1.5 - x) = (1.5 - 0.451) = 1.049 moles

Equilibrium concentration of NO = (1.5 - x) = (1.5 - 0.451) = 1.049 moles

Equilibrium concentration of $NO_2$ = 2x = $(2\times 0.451)=0.902mol$

There are 3 possibilities:

If $K_{eq}$ , the reaction is reactant favored
If $K_{eq}>1$ , the reaction is product favored.
If $K_{eq}=1$ , the reaction is in equilibrium.

Here, the value of $K_{eq}=0.74$ , which is less than 1, therefore the reaction is reactant favored and we can say that there will be very little $NO_2$ .

Hence, the correct option is B. there will be very little $NO_2$

7 0

2 years ago

30 POINTS

Pavlova-9 [17]

Because neither can be created or destroyed

7 0

3 years ago

A stable, binary ionic compound exists where the cation (A) has a change twice in magnitude than that of the anion (X)

love history [14]

Answer:

AX₂

Explanation:

Binary compounds:

The compounds which are made up of the atoms of only two elements are called binary compounds.

For example:

The following compounds are binary:

HCl

H₂O

NH₃

HCl is binary because it is composed of only hydrogen and chlorine. Ammonia is also binary compound because it is made up of only two elements nitrogen and hydrogen.

water is also binary because it is also made up of only two elements hydrogen and oxygen.

In given question it is stated that the charge of cation is twice than the anion which means its charge would be +2 thus anionic part will have the charge -1. In neutral compound the positive and negative charges must be equal in magnitude to cancel the effect of each other and make the compound neutral. So, there must be two anionic atom present so that charge becomes -2 and cancel the +2 charge of cationic part. Thus the formula will be,

AX₂

A⁺²X₂⁻²

8 0

3 years ago

What is it called when a substance is in-between two states of matter?

Wittaler [7]

Answer:

There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. Solids.

Explanation:

Hope this helps you out!!

7 0

2 years ago

Read 2 more answers

Which of the following is evidence that supports the idea of uniformitarianism?

Radda [10]

D.) Rates of soil erosion are much lower during droughts that last several years.

3 0

3 years ago