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3 years ago

Check wether all the answers are correct or not. please?

Chemistry

1 answer:

Fynjy0 [20]3 years ago

3 0

Answer:

H2+NO3=HNO3

Explanation:

becuase HNO3

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How large would the state of New York (235 miles across) be?

Ann [662]

Answer:

235 miles equals 5,280 feet

Explanation:

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3 years ago

I'm not 100% sure of the answer. Explanations are highly appreciated.

PolarNik [594]

Answer:

The correct answer is

$\Delta H=2(1072)+498 -4(799)$

Explanation:

Enthalpy of reaction :

It is the amount of energy released/absorbed when one mole of the substance is formed from the reactant at a constant pressure.

The enthalpy of a reaction can be calculated using :

$\Delta H=\Delta H_{reactants}-\Delta H_{products}$

$2CO+O_{2}\rightarrow 2CO_{2}$

$\Delta H_{reactants}=2(C\equiv O)+O=O$

$\Delta H_{reactants}=2(1072)+498$

$H_{products}=2(2\times C=O)$

$H_{products}=4\times 799$

$\Delta H=\Delta H_{reactants}-\Delta H_{products}$

$\Delta H=2(1072)+498 -4(799)$

$units = \frac{kJ}{mole}$

Please note that :

The carbon monoxide , CO should be taken as C triple bond O. Not C=O .

So , the bond energy =1072 is used

$\Delta H=2(1072)+498 -4(799)$

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4 years ago

Which statement gives a reason why scientist think that the universe began with an explosion

yaroslaw [1]

I believe the answer is

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3 years ago

Which statement best describes what happens during a chemical change?

shutvik [7]

I think the best answer that will describe chemical change is the first option. During a chemical change, b<span>oth the identity and the properties of a substance change because new substances are being formed by a chemical reaction. An example is rusting of steel</span>

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3 years ago

Read 2 more answers

Add them to your friend's list and have them support you along your Brainly journey. Just go to the profile of the person you’d

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3 years ago

Check wether all the answers are correct or not. please?​

Check wether all the answers are correct or not. please?