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seraphim [82]
3 years ago
6

What does the number 7 mean in the following example-73Li?

Chemistry
1 answer:
Pavlova-9 [17]3 years ago
4 0

Answer:

7 is the mass number of li and 3 is the atomic number

a 3

b 7

c 3

d 4

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400 liters of a certain gas is collected at STP. What will the volume be at 273 C and 190 torr pressure?
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3 years ago
The radioactive decay of a certain sample produced 846 disintegrations per minute. exactly 3.00 days later, the rate of decay wa
Margarita [4]

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\boxed{\text{1.81 da}}

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\ln \dfrac{846}{269} = k \times 3.00\\\\\ln3.145 = 3.00k\\1.146 = 3.00k\\\\k =\dfrac{1.146}{3}\\\\k = \text{0.382 /da}\\

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3 years ago
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