Answer:
12.5 g
Explanation:
If element R's half life is 2 minutes then we need to divide 100 g by 1/2 3 times. 100/2 = 50/2= 25/2= 12.5 g.
Hope this helps!
Answer:
Sorry; I am unfamiliar with the details they taught you. I would guess #3, for it allows kinetics to “work on the particles”. #1 makes no sense; what is
“Large”? #2 infers all particles are charged....#4. Seems unclear to me.
Maybe these thoughts will jar your memory.
Explanation:
Answer:
I don't get it is it even a question?
Answer:
63.58 g O
Explanation:
To calculate the mass of O atoms, the number of moles of O atoms are needed and can be calculated as follows:
n (no. of moles) = nA ÷ 6.02 × 10^23
n = 2.393 x 10^24 ÷ 6.02 × 10^23
n = 0.398 × 10^ (24-23)
n = 0.398 × 10^1
n = 3.98moles.
To calculate the mass of Oxygen, we use the following formula:
moles = mass/molar mass
Molar mass of O = 16.
3.98 = m/16
m = 3.98 × 16
m = 63.68grams of Oxygen.
Heat within the asthenosphere creates convection currents (similar to the currents that can be seen in the lava lamp). These convection currents cause the tectonic plates to move several centimeters per year relative to each other.
