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dem82 [27]
3 years ago
13

1. What is the first element on the periodic table?

Chemistry
2 answers:
Elena L [17]3 years ago
7 0
Hydrogen as it has only 1 proton and therefore only an atomic mass of 1...
hram777 [196]3 years ago
4 0
The first element is Hydrogen
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Answer:

It's mileage is 5.95 km per liter.

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If the half life of a radioactive isotope is 4000 years, how much would be left in a fossil after 4000 years
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5 0
3 years ago
Which equation is derived from the combined gas law? StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFrac
ioda

Answer:

\frac{V_!}{T_1} =\frac{V_2}{T_2}

Explanation:

hello,

the combined gas law equation is given as;

\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}

This combined gas law is gotten from the combination of Charles' law, Boyle's law and the Pressure law.

At constant pressure(this means the pressure is unchanged or fixed and this means the pressure is eliminated), we have:

\frac{V_1}{T_1} = \frac{V_2}{T_2}

At constant volume(we eliminate the volume since it is fixed or unchanged), we have;

\frac{P_1}{T_1} = \frac{P_2}{T_2}

At constant temperature (we also eliminate temperature), we have

P_1V_1 = P_2V_2.

thus from the options provided in the question the right answer will be

\frac{V_!}{T_!} = \frac{V_2}{T_2}

4 0
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Answer:

HARDNESS

Explanation:

hope this helps

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