All categories

3 years ago

00

Chemistry

2 answers:

Andre45 [30]3 years ago

5 0

Answer:

Nitrogen

Explanation:

To find your answer, pay attention to the number of protons. Protons define an element's atomic number.

Aleonysh [2.5K]3 years ago

4 0

Answer:

Nitrogen

Explanation:

:) pls mark brainliest

You might be interested in

Which statement describes characteristics of earthquakes occurring along divergent plate boundaries?

IgorC [24]

B
. They are large and occur at shallow depths near the where the plates diverge.

7 0

3 years ago

Which of these is a characteristic of science?

Ivahew [28]

D. It gives the same results when experiments are repeated

3 0

4 years ago

Read 2 more answers

Calculate the standard reaction enthalpy for the reaction NO2(g) → NO(g) + O(g) given +142.7 kJ/mol for the standard enthalpy of

bulgar [2K]

Answer:

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

Explanation:

$O_2(g) \rightarrow \frac{2}{3}O_3(g),\Delta H^o_{1}=142.7 kJ/mol$ ..[1]

$O_2(g) \rightarrow 2 O(g),\Delta H^o_{2}=498.4 kJ/mol$ ..[2]

$NO(g) + O_3(g)\rightarrow NO_2(g) + O_2(g) ,\Delta H^o_{3} = -200 kJ/mol$ ..[3]

$NO_2(g)\rightarrow NO(g) + O(g),\Delta H^o_{4}=?$ ..[4]

Using Hess's law:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

2 × [4] = [2]- (3 ) × [1] - (2) × [3]

$2\times \Delta H^o_{4}=\Delta H^o_{2} -3\times \Delta H^o_{1}-2\times \Delta H^o_{3}$

$2\times \Delta H^o_{4}=498.4 kJ/mol-3\times 142.7 kJ/mol-2\times -200 kJ/mol$

$2\times \Delta H^o_{4}=470.3 kJ/mol$

$\Delta H^o_{4}=\frac{470.3 kJ/mol}{2}=235.15 kJ/mol$

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

7 0

3 years ago

Which is bigger 145 m or 145 km

Citrus2011 [14]

145 km i think is bigger

8 0

3 years ago

Read 2 more answers

How does the digestive system work with the muscular system?

soldier1979 [14.2K]

Answer:

the answer is not d because you can pee without moving. so its a because without the food nutrient no part of our body can work

5 0

3 years ago