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2 years ago

If the molar mass is 144 g/mol what is the molecular formula? valproic acid

1 answer:

8 0

The molecular formula of valproic acid is C8H16O2. The molar mass of a substance is the sum of the atomic mass of the elements involved in a compound. For valproic acid, we calculate the molar mass as follows:

C = 8 x 12 g/mol
H = 1 x 16 g/mol
O = 2 x 16 g/mol
----------------------
144 g/mol

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A piece of unknown metal with mass 68.6 g is heated to an initial temperature of 100 °C and dropped into 84 g of water (with an

V125BC [204]

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Explanation:

8 0

3 years ago

The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene

frez [133]

The atomic mass of carbon is 12.011 g/mol.
The atomic mass of hydrogen is 1.00794 g/mol.

This means the molar mass of CH is

$12.011+1.00794=13.01894 \text{ g/mol}$

Dividing the given molar mass by this, $\frac{104.1}{13.01894} \approx 8$

This means the molecular formula is $\boxed{\text{C}_{8}\text{H}_{8}}$

7 0

1 year ago

How does intertia affect gymnastics

Olegator [25]

Inertia is resistance to changes in motion. Which means if you are at rest it takes an external force to get you moving. And once you are moving it takes an external force to change the direction of that motion.

For a person doing gymnastics the point that is subject to the above statement is her center of mass (roughly her belly button) . 

So for example, once you launch into the air, gravity is the only significant force on you. It keeps you from traveling out into space by pulling you down and the trajectory of your belly button is a parabola. Now there is nothing you can do with your muscles (internal forces) to change that trajectory, even though you can do twists & turns about the center of mass. The height and range of the parabolic trajectory is determined by the angle & speed at which you initially launch yourself.
_____________________________________________________________
inertia is one of newtons laws of motion so an object in motion tends to remain in motion until another force acts upon it that is what newton said when you are doing a back hand spring it is easier to keep going then to stop
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Hope this helps!!! :D
I love gymnastics!!!!

6 0

2 years ago

The acetylene tank contains 35.0 mol C2H2, and the oxygen tank contains 84.0 mol O2.

harkovskaia [24]

Answer:- As per the question is asked, 35.0 moles of acetylene gives 70 moles of carbon dioxide but if we solve the problem using the limiting reactant which is oxygen then 67.2 moles of carbon dioxide will form.

Solution:- The balanced equation for the combustion of acetylene is:

$2C_2H_2(g)+5O_2(g)\rightarrow 4CO_2(g)+2H_2O(g)$

From the balanced equation, two moles of acetylene gives four moles of carbon dioxide. Using dimensional analysis we could show the calculations for the formation of carbon dioxide by the combustion of 35.0 moles of acetylene.

$35.0molC_2H_2(\frac{4molCO_2}{2molC_2H_2})$

= $70molCO_2$

The next part is, how we choose 35.0 moles of acetylene and not 84.0 moles of oxygen.

From balanced equation, there is 2:5 mol ratio between acetylene and oxygen. Let's calculate the moles of oxygen required to react completely with 35.0 moles of acetylene.

$35.0molC_2H_2(\frac{5molO_2}{2molC_2H_2})$

= $87.5molO_2$

Calculations shows that 87.5 moles of oxygen are required to react completely with 35.0 moles of acetylene. Since only 84.0 moles of oxygen are available, the limiting reactant is oxygen, so 35.0 moles of acetylene will not react completely as it is excess reactant.

So, the theoretical yield should be calculated using 84.0 moles of oxygen as:

$84.0molO_2(\frac{4molO_2}{5molO_2})$

= $67.2molCO_2$

7 0

3 years ago

Read 2 more answers

Based on this diagram, which type of stars would belong to spectral class M and have the

mixas84 [53]

Answer:J , the answer is super giants

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2 years ago