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3 years ago

If an automobile air bag has a volume of 11.5 l , what mass of nan3 (in

2 answers:

8 0

Moles of NaN3 at STP = volume of gas / 22.4 = 11.5/22.4 = 0.5mole. Massof NaN3 = moles of NaN3 x molecular weight = 0.5 x 65 = 32.5 grams.

anastassius [24]3 years ago

5 0

Answer: The mass of sodium nitride required is 35.4 grams.

Explanation:

We are given:

Volume of gas = 11.5 L

At STP:

22.4 L of volume is occupied by 1 mole of gas

So, 11.5 L of volume will be occupied by = $\frac{1}{22.4}\times 11.5=0.513mol$ of sodium nitride

To calculate the mass for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of sodium nitride = 69 g/mol

Moles of sodium nitride = 0.513 moles

Putting values in above equation, we get:

$0.513mol=\frac{\text{Mass of sodium nitride}}{69g/mol}\\\\\text{Mass of sodium nitride}=(0.513mol\times 69g/mol)=35.4g$

Hence, the mass of sodium nitride required is 35.4 grams.

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The molecular weight of hemoglobin can be calculated using osmotic pressure

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where

π = osmotic pressure

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R = gas constant = 0.0821 L atm / mol K

T = temperature = 25°C = 25 + 273 K = 298 K

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2 years ago

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alexira [117]

In cell biology, the cytoplasm is the material or protoplasm within a living cell, excluding the cell nucleus. It comprises cytosol (the gel-like substance enclosed within the cell membrane) and the organelles – the cell's internal sub-structures. All of the contents of the cells of prokaryote organisms (such as bacteria, which lack a cell nucleus) are contained within the cytoplasm. Within the cells of eukaryote organisms the contents of the cell nucleus are separated from the cytoplasm, and are then called thenucleoplasm. The cytoplasm is about 80% water and usually colorless.[1]

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3 years ago

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True. Although nuclear energy itself is renewable, the material (uranium) used in nuclear power plants is not.

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3 years ago

The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the

weqwewe [10]

Answer:

The pressure increases by a factor of four.

Explanation:

Let's consider a gas at a given temperature and pressure (T₁, P₁). The absolute temperature of a gas is increased four times (T₂ = 4 T₁) while maintaining a constant volume. We can assess the effect on the pressure (P₂) by using Gay Lussac's law.

P₁/T₁ = P₂/T₂

P₂ = P₁ × T₂/T₁

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2 years ago

Crime scene investigators keep a wide variety of compounds on hand to help with identifying unknown substances they find in the

Sergio039 [100]

So 100 g of this substance has 63.57 g of carbon, 6 g of hydrogen, 9.267 of nitrogen, and 21.17 of oxygen. I need to have them all in moles (n). You can find the molar mass (M) of each element in a periodic table.

n = m/M
63.57 g C -> 63.57 g C/12.01 g/mol = 5.29 moles C
6 g H -> 6 g C/1.008 g/mol = 5.95 moles H
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So the minimum formula has this rate:

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Now you should divide all those numbers by the smallest one (1.32):

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Now it looks a lot more like a molecular formula… but we still have fractions.

Let’s multiply all numbers by 2:

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Now they are all whole numbers!

So the minimum formula is C8H9NO2

The minimum formula is not always equal to the molecular formula… but in this case, I found there is a molecular formula with this same numbers, and it’s called acetaminophen.

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3 years ago

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