7. Suppose 104 g of hydrogen peroxide (H2O2) decomposes as shown, and all of the O2 gas is collected (dry) in a balloon at 1.00 atm and 25°C. Find the balloon volume.
2H,0(aq) → 2H, O(1) + O2(g)
A) 18.7L
B) 37.4L
C) 6.27 L
D) 3.14 L
E) 74.8 L

petroleum? coal maybe?

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.