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just olya [345]
3 years ago
7

1. Naturally occurring europium (Eu) consists of two isotopes was a mass of 151 and 153. Europium- 151 has an abundance of 48.03

% and Europium-153 has an abundance of 51.97%. What is the atomic mass of europium?​
Chemistry
2 answers:
sergejj [24]3 years ago
3 0
The atomic mass of Europium is 152 amu

Work:
151(0.4803) = 72.52 amu
153(0.5197) = 79.5 amu
72.5 + 79.5 = 152 amu
Mazyrski [523]3 years ago
3 0
34 percent would mean sudden and careful passing
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98.56 dm^3 of oxygen at STP would be required to react completely with 38.8g of propane.

<u>Given that :</u>

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