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3 years ago

7

What is the only thing held constant in a combined gas law problem?

1 answer:

vodomira [7]3 years ago

3 0

Only the amount of gas is held constant.

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HNO3 + Mg(OH)2 yield Mg(NO3)2 + H2O

Minchanka [31]

Answer:

yes

Explanation:

because this is a neutralization reaction that yield salt and water

8 0

3 years ago

What has been the effect of increased population on Earth's natural resources?

olya-2409 [2.1K]

Answer:

Generally speaking, as the human population grows, our consumption of natural resources increases. More humans consume more freshwater, more land, more clothing, etc. Scientific and technological innovations mean that we are improving our efficiency at using and harvesting natural resources.

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5 0

3 years ago

The weights of all elements are always compared to oxygen.<br> True <br> False

kozerog [31]

Answer:

false

Explanation:

I'm pretty sure it's compared to carbon

8 0

3 years ago

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NH₄NO₃ → N₂O + 2H₂O When 45.70 g of NH₄NO₃ decomposes, what mass of each product is formed?

Anna007 [38]

Answer: 25.13 g of $N_2O$ and 20.56 g of $H_2O$ will be produced from 45.70 g of $NH_4NO_3$

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} NH_4NO_3=\frac{45.70g}{80.04g/mol}=0.571moles$

The balanced chemical equation is:

$NH_4NO_3\rightarrow N_2O+2H_2O$

According to stoichiometry :

1 mole of $NH_4NO_3$ produce = 1 mole of $N_2O$

Thus 0.571 moles of $NH_4NO_3$ will require= $\frac{1}{1}\times 0.571=0.571moles$ of $N_2O$

Mass of $N_2O=moles\times {\text {Molar mass}}=0.571moles\times 44.01g/mol=25.13g$

1 mole of $NH_4NO_3$ produce = 2 moles of $H_2O$

Thus 0.571 moles of $NH_4NO_3$ will require= $\frac{2}{1}\times 0.571=1.142moles$ of $H_2O$

Mass of $H_2O=moles\times {\text {Molar mass}}=1.142moles\times 18g/mol=20.56g$

Thus 25.13 g of $N_2O$ and 20.56 g of $H_2O$ will be produced from 45.70 g of $NH_4NO_3$

5 0

3 years ago

An ecologist counts 75 cardinals in an area measuring 15 square kilometers. What is the population density of the cardinals?

Rom4ik [11]

<u>Answer:</u>

5

<u>Explanation:</u>

We know that,

number of count of cardinals = 75; and

measured area = 15 square kilometers.

To find the population density of the cardinals in an area of 15 square kilometers, we need to divide the number of cardinals by the given unit area:

Population density of cardinals = 75 / 15 = 5

Therefore, the population density of cardinals in an area measuring 15 square kilometers is 5.

8 0

3 years ago

Read 2 more answers