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Kisachek [45]
3 years ago
15

There are two atoms of hydrogen and one atom of oxygen in one molecule of water . How many atoms of hydrogen are there in 51 mol

ecules of water ?
Mathematics
1 answer:
Alex777 [14]3 years ago
8 0

If there are two hydrogen atom molecules in one atom of water you'd do 51 times 2, getting you 102 hydrogen atoms in 51 water molecules.

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You need a 75% alcohol solution. On hand, you have a 1125 mL of a 90% alcohol mixture. How much pure water will you need to add
Alex777 [14]
\bf \begin{array}{lccclll}
&amount&concentration&
\begin{array}{llll}
concentrated\\
amount
\end{array}\\
&-----&-------&-------\\
\textit{90\% sol'n}&1125&0.9&(1125)0.9\\
\textit{water}&x&0&0x\\
-----&-----&-------&-------\\
mixture&y&0.75&0.75y
\end{array}

so.. whatever "x" is, we know 1125 + x = y
and whatever the alcohol concentration yield may be, we know

(1125)(0.9) = 0.75y

(1125)(0.9) = 0.75y   <--- solve for "y", that's how much the final amount of milliliters will be

how much pure water was added? subtract 1125 from that, or y - 1125


5 0
3 years ago
Compare 1.3 and 1 and 3/5
Ratling [72]
1 and 3/5 is bigger 
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8 0
3 years ago
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Anon25 [30]
The answer is 10.2……
7 0
2 years ago
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a large bottle of juice contains 500 mL of juice a medium bottle contains 70% as much juice as a large bottle how many millimete
Alexeev081 [22]

Answer:

350ml

Step-by-step explanation:

We know that a large bottle of juice has 500ml and a medium bottle contains 70% of the large bottle. We can determine how many milliliters of juice is in the medium bottle:

500\cdot{0.7}=350

The medium bottle contains 350ml of juice.  

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Answer:

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