Answer:
a. 94 g of Mn
b. 0.239 g of He
c. 6.69ₓ10⁻⁸ g of N
d. 1.14ₓ10⁻⁶ g of U
Explanation:
This is the way to make the conversions:
Number of atoms → Moles of element → grams
We begin from the information that: 1 mol of atoms has 6.02×10²³ (NA) atoms
Let's convert all the numbers to amount of moles (number of atoms / NA)
a. 1.03 x 10²⁴ of Mn / 6.02×10²³ = 1.71 moles of Mn
b. 3.60 x 10²² of He / 6.02×10²³ = 0.0598 moles of He
c. 2.88 x 10¹⁵ of N /6.02×10²³ = 4.78ₓ10⁻⁹ moles of N
d. 2.88 x 10¹⁵ of U /6.02×10²³ = 4.78ₓ10⁻⁹ moles of U
We convert the moles to mass (moles . molar mass)
a. 1.71 moles of Mn . 54.94 g /1mol = 94 g of Mn
b. 0.0598 moles of He . 4 g /1mol = 0.239 g of He
c. 4.78ₓ10⁻⁹ moles of N . 14 g /1mol = 6.69ₓ10⁻⁸ g of N
d. 4.78ₓ10⁻⁹ moles of U . 238.03 g /1mol = 1.14ₓ10⁻⁶ g of U
It is part of oceans, air, rocks, soil and all living things. Carbon doesn't stay in one place. It is always on the move! In the atmosphere, carbon is attached to oxygen in a gas called carbon dioxide.
Hope this helps.
ecological. i hope this helps!!!!
Answer/Explanation:
f is the number of waves produced by a source per second, it is measured in hertz (Hz). T is the time it takes for one complete oscillation, it is measured in seconds. All waves, including sound waves and electromagnetic waves, follow this equation. A radio wave has a time period of 0.0000003333333 seconds.
Answer:
1.01 amu
Explanation:
Published atomic mass = 1.00797amu => 1.01 amu (3 sig-figs)