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Arte-miy333 [17]
3 years ago
14

Express 250,000 mL in liters. A) 0.25 L B) 2,500 L C) 25 L D) 250 L

Chemistry
2 answers:
goblinko [34]3 years ago
6 0

Answer:

d: 250 L

Explanation:

elena-s [515]3 years ago
5 0
D) 250l
Explanation :
250,000/1000
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How many moles of ethanol C2H6O, are in a 10.0g sample​
Brrunno [24]

Answer: 0.217 mol

Explanation:

To find the amount of moles in a 10 g sample, we need the molar mass of ethanol.

Molar Mass: 46.07 g/mol

Now that we have the molar mass, we can find moles.

10.0 g*\frac{1mol}{46.07g}=0.217 mol

We know that there are 0.217 mol in a 10.0 gram sample.

6 0
3 years ago
MgBr2 + NaCl -> MgCl2 + NaBr is the reaction between magnesium bromide and sodium chloride. What type of reaction is this?
valkas [14]

Answer:

Synthesis

Explanation:

I just did the test and got it right!!

4 0
3 years ago
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A chemist prepares hydrogen fluoride by means of the following reaction:
natita [175]

Answer:

39.3%

Explanation:

CaF2 + H2SO4 --> CaSO4 + 2HF

We must first determine the limiting reactant, the limiting reactant is the reactant that yields the least number of moles of products. The question explicitly says that H2SO4 is in excess so CaF2 is the limiting reactant hence:

For CaF2;

Number of moles reacted= mass/molar mass

Molar mass of CaF2= 78.07 g/mol

Number of moles reacted= 11g/78.07 g/mol = 0.14 moles of Calcium flouride

Since 1 mole of calcium fluoride yields two moles of 2 moles hydrogen fluoride

0.14 moles of calcium fluoride will yield 0.14×2= 0.28 moles of hydrogen fluoride

Mass of hydrogen fluoride formed (theoretical yield) = number of moles× molar mass

Molar mass of hydrogen fluoride= 20.01 g/mol

Mass of HF= 0.28 moles × 20.01 g/mol= 5.6 g ( theoretical yield of HF)

Actual yield of HF was given in the question as 2.2g

% yield of HF= actual yield/ theoretical yield ×100

%yield of HF= 2.2/5.6 ×100

% yield of HF= 39.3%

4 0
3 years ago
The molecular mass of the compound is 132 amu. What is the molecular formula?
densk [106]
C6H12O3 is a molecular formula that contains 54.5% C, 9.1% H, and 36.4% O and <span>has a molar mass 132 amu. </span>
4 0
3 years ago
Who's theory states that atoms are made up of empty space with electrons around a positively charged mass?
emmasim [6.3K]
That would be Rutherford's Theory.
5 0
2 years ago
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