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3 years ago

Which temperature is coldest??

Chemistry

1 answer:

svp [43]3 years ago

8 0

The lowest temperature is the coldest.

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Alla [95]

Answer:

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3 years ago

If there is 5 atoms of oxygen in the reactant, how many oxygen atoms must be in the product

tiny-mole [99]

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3 years ago

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]

Answer: The correct answer is Option D.

Explanation:

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.

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3 years ago

What depends on public opinion and support? A. regulations at a local level B. enforcement of laws C. success of a policy D. rev

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i believe the answer is success of a policy. if this was correct please mark brainliest and lmk if you have any more questions x

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4 years ago

Diabetes mellitus is characterized by too much glucose buildup in the blood. In _________________ diabetes, this is because the

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The best answer is b) yess it’s b try it it’s the best one I’m pretty sure

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3 years ago