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3 years ago

PLEASE PLEASE HELP Calculate the mass of 3.4 moles of nitric acid (HNO3)

1 answer:

6 0

Molar mass of nitric acid (HNO3) =atomic mass of hydrogen + atomic mass of nitrogen +3x atomic mass of oxygen . The molar mass of nitric acid (HNO3) is 63.0144 gram per mole, but you have 3.4 moles. Therefore; the answer is 63.0144 g/mole x 3.4 moles = 214.24896 grams.

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Please help!!<br><br> What colors do acids and bases turn litmus paper?

Yakvenalex [24]

Answer:

acid turns blue litmus red and base turns red litmus blue

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4 years ago

Read 2 more answers

Why do you think that KCl can be used as an effective water softener and also as a drug to kill someone? What is the difference

Archy [21]

Answer: For price-sensitive customers and for customers with no sodium-related health concerns, sodium chloride is an excellent choice. It's effective, inexpensive, easily obtained and usable in any water softener. On the other hand, potassium chloride would be a better choice for other kinds of customers.

Explanation:

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3 years ago

Glucose, C 6 H 12 O 6 , is used as an energy source by the human body. The overall reaction in the body is described by the equa

Rufina [12.5K]

Answer : The mass of $O_2$ required is, 61.82 grams.

Explanation :

First we have to calculate the moles of $C_6H_{12}O_6$

$\text{Moles of }C_6H_{12}O_6=\frac{\text{Given mass }C_6H_{12}O_6}{\text{Molar mass }C_6H_{12}O_6}=\frac{58.0g}{180g/mol}=0.322mol$

Now we have to calculate the moles of $O_2$ .

The balanced chemical equation is:

$C_6H_{12}O_6(aq)+6O_2(g)\rightarrow 6H_2O(l)+6CO_2(g)$

From the balanced reaction we conclude that

As, 1 mole of $C_6H_{12}O_6$ react with 6 mole of $O_2$

So, 0.322 moles of $C_6H_{12}O_6$ react with $0.322\times 6=1.932$ moles of $O_2$

Now we have to calculate the mass of $O_2$

$\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2$

Molar mass of $O_2$ = 32 g/mole

$\text{ Mass of }O_2=(1.932moles)\times (32g/mole)=61.82g$

Therefore, the mass of $O_2$ required is, 61.82 grams.

7 0

3 years ago

Two forces are acting on an object. One force is pulling 5 newtons to the left,

tia_tia [17]

The net force is the vector sum of the two forces, since they’re acting in opposite directions one is negative (left) so
-5 + 7 = 2 to the right
Magnitude is 2
Direction is right

8 0

2 years ago

Which is the best description of activation energy?

Naddik [55]

The activation energy is the energy that must be present before for a reaction is to occur. it can be altered and lowered by the use of a catalyst that offers an alternative pathway with a lower activation energy.

hope that helps :)

7 0

4 years ago