What is the total number of nitrogen atoms in 0.25 mole of no2 gas?

1.5*10^23 atoms

Explanation:

What is the total number of nitrogen atoms in 0.25 mole of no2 gas?

mole is the amount of a substance. Its is calculated as mass of a substance over molecular mass(g/mol).

it contains 1 avogadro constant

1 mol=6.02*10^23 avogadros constant

0.25mol=x

so cross and multiply to get the value of x

6.022140857( 74 ) × 10 ^23

0.25*6.022*10^23

nitrogen atoms in such a molar quantity of nitric oxide,

1.5*10^23 atoms

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

answer: i dont know the answer but this might

explanation:

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