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3 years ago

One of the main goals of environmental science is to help humans use the environment in a way that is economically profitable.

Chemistry

1 answer:

kkurt [141]3 years ago

5 0

Answer:

true this is correct its your econimically

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22. A flask containing 450 mL of 0.50 M H2SO4 was accidentally knocked to the floor. How many grams of NaHCO, do you need to put

Dvinal [7]

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

To calculate the moles of a solute, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}\text{Volume of solution (in L)}}$

We are given:

Volume of sulfuric acid = 450mL = 0.45 L (Conversion factor: 1 L = 1000 mL)

Molarity of the solution = 0.5 moles/ L

Putting values in above equation, we get:

$0.5mol/L=\frac{\text{Moles of sulfuric acid}}{0.45L}\\\\\text{Moles of sulfuric acid}=0.225mol$

For the given chemical reaction:

$H_2SO_4(aq.)+2NaHCO_3(aq.)\rightarrow Na_2SO_4(aq.)+2H_2O(l)+2CO_2(g)$

By Stoichiometry of the reaction:

1 mole of sulfuric acid reacts with 2 moles of sodium bicarbonate.

So, 0.225 moles of sulfuric acid will react with = $\frac{2}{1}\times 0.225=0.45mol$ of sodium bicarbonate

To calculate the mass of sodium bicarbonate, we use the equation:

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

Moles of sodium bicarbonate = 0.45 moles

Molar mass of sodium bicarbonate = 84.007 g/mol

Putting values in above equation, we get:

$0.45mol=\frac{\text{Mass of sodium bicarbonate}}{84.007g/mol}\\\\\text{Mass of sodium bicarbonate}=38g$

Hence, the correct answer is Option D.

7 0

3 years ago

What is 123 lbs in kg?

yarga [219]

1 lbs ----------- 0.453592 kg
123 lbs -------- ??

123 x 0.453592 / 1 => 55.7919 kg

6 0

3 years ago

Read 2 more answers

One main difference between a Prokaryotic cell and an Eukaryotic cells is __________.

Brilliant_brown [7]

Answer:

The Eukaryotic cell has a nucleus

Explanation:

Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.

6 0

3 years ago

T or F? The force of attraction between a positive and negative electric charge decreases quickly as the distance between them i

agasfer [191]

False, The attraction would get stronger.

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2 years ago

before phase change: molecules move around each other 15. The medicine in the diagram above has molecules that are moving around

Likurg_2 [28]

Answer:

89 pills

Explanation:

because it is

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3 years ago