christinachavez081
02.04.2020 •
Chemistry
I NEED AND ANSWER ASAP! PLEASE HELP ME!! I'M BEGGING!
1) 1.78L of a gas is at 37.5 C. At what temperature would the volume of the gas increase to 2.55 L?
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Ответ:
19.948 mol.
Explanation:
Knowing that every one mole of a substance contains Avogadro's no. of molecules (NA = 6.022 x 10²³).Using cross multiplication:
1.0 mole → 6.022 x 10²³ atoms of He.
??? mole → 12.013 x 10²⁴ atoms of He.
∴ The no. of moles of are in 12.013 x 10²⁴ atoms of He = (12.013 x 10²⁴ atoms of He) (1.0 mole) / (6.022 x 10²³ atoms of He) = 19.948 mol.