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3 years ago

Why is carbon dioxide considered a greenhouse gas?

Chemistry

2 answers:

lord [1]3 years ago

7 0

Answer:because we are able to breath it in earth

Explanation:

kodGreya [7K]3 years ago

4 0

Answer:

Explanation:

Carbon dioxide, a greenhouse gas, is the main pollutant that is warming Earth. Though living things emit carbon dioxide when they breathe, carbon dioxide is widely considered to be a pollutant when associated with cars, planes, power plants, and other human activities that involve the burning of fossil fuels such as gasoline and natural gas.

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I need evidence and a justification that a chemical change/reaction has occured when water meets liquid nitrogen.

Ksju [112]

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3 0

3 years ago

HELP QUICK!!!!!!!!!!

Semenov [28]

Answer: 4 hours and 30 minutes

Explanation: because first wave was 1:30:00 and the second is 1:34:30

1:30:00 goes into 1:34:30 4 hours and 30 minutes.

8 0

3 years ago

Enter a net ionic equation for the reaction between nitric acid and calcium hydroxide.

KengaRu [80]

HNO₃(aq) +Ca(OH)₂(aq) --> H₂O(l) + Ca(NO₃)₂(aq)

It is Ca(NO₃)₂ because NO₃ has a charge of -1, and Ca has a charge of 2+. And when writing an ionic compound, you take the charge of 1 and write it as the subscript of the other.

Now let's balance the equation and then find the net ionic equation.
2HNO₃(aq) +Ca(OH)₂(aq) --> 2H₂O(l) + Ca(NO₃)₂(aq)

2H⁺(aq) + 2NO₃⁻(aq) + Ca²⁺(aq) + 2OH⁻(aq) --> 2H₂O(l) + Ca²⁺(aq) + 2NO₃⁻(aq)

We can get rid of the spectator ions. These are the ions that are on both sides.
We are left with
2H⁺(aq) + 2OH⁻(aq) --> 2H₂O(l)

We can simplify the net ionic equation down to
H⁺(aq) + OH⁻(aq) --> H₂O(l)

8 0

4 years ago

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.

<u>Answer:</u> The correct option is B. there will be very little $NO_2$

<u>Explanation:</u>

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

3 years ago

A teacher brings in a cup of iced water and asks students to discuss if the system is exothermic or endothermic . Aida states th

Montano1993 [528]

Answer:

Explanation:

In thermodynamics, a exothermic system looses heat to the surroundings while an endothermic system absorbs heat from the surroundings.

A system is a part the universe marked off by a specified boundary. The contents of the cup constitutes the system in this case.

The region of space outside the system is called the surroundings. Hence everything outside the cup constitutes the surroundings.

7 0

3 years ago