Question

The rms speed of helium in ms (atomic mas
4.0g mol-') at 400K is
1) 1580 2) 15.8 3)28 4)158​

Answer 1

Answer:option 1 well aproximal answer is 1580

Explanation:use the formula √3RT /√m where R= universal gas constant =8.13 J/K.mol and T is temp in Kelvin upon substitution I get the value as 1577 which u rounded off to 1580 BTW use a calculator it's much easier but don't get used it too much