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lions [1.4K]
3 years ago
12

Please help me! U will get a 30 points!

Chemistry
1 answer:
Rudiy273 years ago
4 0

Answer:

C

Explanation:

The stem and leaves need sunlight to undergo photosynthesis, they will grow in such a way until they receive some sunlight.

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Atomic number , protons and electrons have the same value / their value is same .

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A 32.8 g sample of gas occupies 22.414 L at STP. What is the molecular weight of this gas?
olasank [31]

Answer:

32.8g/mole

Explanation:

Given parameters:

Mass of sample of gas = 32.8g

Volume  = 22.4L

Unknown:

Molecular weight  = ?

Solution:

To solve this problem we must understand that at rtp;

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Number of mole of the gas  = 1 mole

 Now;

   Mass  = number of moles x molecular weight

    molecular weight  = \frac{mass}{molecular weight}    = \frac{32.8g}{1mole }      = 32.8g/mole

8 0
2 years ago
1. Fluorine-21 has a half-life of approximately 5 seconds. How much of a 200 gram sample would remain after 1 minute.
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Answer:

Fluorine-21 has a half-life of approximately 5 seconds. How much of a 200 gram sample would remain after 1 minute.

1/4096

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