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mestny [16]
3 years ago
8

Give the formula for heptafluorine tricarbide

Chemistry
1 answer:
SCORPION-xisa [38]3 years ago
6 0

Answer:

RnMxF7y− or RnMxF7y

Explanation:

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After the industrial revolution, the dark colored bark caused which kind of peppered moths to flourish
jeka57 [31]
It would be C) the dark colored peppered moths.
x
5 0
3 years ago
Read 2 more answers
A measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.
UNO [17]

Answer:Concentration is a measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.

Explanation:

4 0
3 years ago
First: Calculate the number of moles of Kool-Aid powder needed to make 100mL of a 0.1M solution.
morpeh [17]
For this question, we can use the molarity formula, which is as follows:

Molarity= \frac{moles}{Liters}

We know that we want a 0.1M solution in 100 mL, so we can plug those into the equation to find the number of moles required:

0.1M= \frac{moles}{0.1L}
moles=0.01

So now we know that the number of moles of the Kool-Aid powder is 0.01. We also know that the chemical formula for this powder is C_{12}  H_{22}  O_{11}.

We can find the molar weight of this powder by taking the atomic weight from the periodic table and multiply it by the number of atoms in the compound. Let's find the molar weight of the powder:

Find the atomic weight of carbon:

C=12.01 g

There are 12 C's, so we multiply by 12:

12.01g*12=144.12g

Then we have 22 H's, each having an atomic weight of 1.008g:

1.008g*22=22.18g

And finally there are 11 O's, each with an atomic weight of 15.99g:

15.99g*11=175.89g

Then we add up all of the weights:

144.12g+22.18g+175.89g=342.19g  -> So we know that the molar weight of the Kool-Aid powder is 342.19g.

Now we can find the amount of grams that we need for the desired solution as follows:

\frac{342.19g}{1mol}* \frac{0.01mol}{1}=3.42g

So now we know that we need 0.01 moles of the powder, and we need 3.42g of the powder to make the desired solution.
7 0
3 years ago
If 4.50 g of (nh4)2so4 is dissolved in enough water to form 250. ml of solution, what is the molarity of the solution?
natima [27]
The molarity of a solution is the number of moles of a substance in one liter of that substance. 
The molar mass of ammonium sulfate (NH4)2SO4 is 132.14 grams/mole
Calculate the moles of ammonium sulfate:
(4.50 grams)/(132.14 grams/mole) = 0.0341 moles of ammonium sulfate
convert mL to Liters 250. mL becomes 0.250 liters
Take the number of moles over the number of liters
0.0341 moles / 0.250 liters = 0.136 molar or 0.136M = molarity of the solution
8 0
3 years ago
What is the molar mass of Disodium sulfide nonahydrate
Scilla [17]

Answer:

240 g/mol

Explanation:

We'll begin by writing the chemical formula of Disodium sulfide nonahydrate. This is illustrated below:

The molecular formula of disodium sulfide nonahydrate is Na₂S.9H₂O

Finally, we shall determine the molar mass of disodium sulfide nonahydrate, Na₂S.9H₂O. This can be obtained by adding the individual molar mass of the element present in the compound as illustrated below:

Molar mass of Na₂S.9H₂O = (23×2) + 32 + 9[(2×1) + 16]

= 46 + 32 + 9[2 + 16]

= 46 + 32 + 9[18]

= 46 + 32 + 162

= 240 g/mol

Thus, the molar mass of disodium sulfide nonahydrate, Na₂S.9H₂O is 240 g/mol

7 0
3 years ago
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