2 years ago

Which of these is a base? A. HCI B. Vinegar C. HNO 3 D. Ammonia

Chemistry

2 answers:

Mrrafil [7]2 years ago

5 0

Answer:

ammonia is a base

hope it helps

murzikaleks [220]2 years ago

4 0

Answer:

D. Ammonia

hope it helps

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Oxygen and tin 4 chloride react form chlorine and tin 3 oxide

Deffense [45]

Your question wasn’t very clear, but that isn’t right.

4 0

2 years ago

A 78.0 g sample of an unknown compound contains 12.4 g of hydrogen. what is the percent by mass of hydrogen in the compound?

AleksandrR [38]

Formula to find the percent composition of an element in a compound is $\frac {MolarMassOfElement}{MolarMassOfCompound}*100$ .

Now enter the variables into the formula.

$\frac {12.4}{78.0}*100 = 15.897$ %
Round to 3 significant figures. 15.897% = 15.9%

The answer is 15.9% H

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3 years ago

Read 2 more answers

A student wants to reclaim the iron from an 18.0-gram sample of iron(III) oxide, which

lilavasa [31]

Answer:

$m_{Fe}=12.6gFe$

Explanation:

Hello,

In this case, since we have grams of iron (III) oxide whose molar mass is 159.69 g/mol are able to compute the produced grams of iron by using its atomic mass that is 55.845 g/mol and their 2:4 molar ratio in the chemical reaction:

$m_{Fe}=18.0gFe_2O_3*\frac{1molFe_2O_3}{159.69gFe_2O_3}*\frac{4molFe_2O_3}{2molFe_2O_3} *\frac{55.845gFe}{1molFe_2O_3} \\\\m_{Fe}=12.6gFe$