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Leokris [45]
3 years ago
12

HELP!!! What has 5 valence electrons and is in period 3 on the periodic table?

Chemistry
1 answer:
Leona [35]3 years ago
7 0

Answer:

-182

+281

116ueuehehheue

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How many moles of HCl are present in 0.70 L of a 0.63 M HCl solution?
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a block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. it has a mass of 213 g. what is its density? a. 638 g/cm3 b.
Juliette [100K]
Volume = 3 cm × 3cm × 3cm
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Mass  =  213 g

Density  =  \frac{MASS}{VOLUME}
 
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svetlana [45]

Answer:

0.0761.

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Explanation:

Hello!

In this case, since the writing of numbers in standard notation given the scientific notation requires adding zeros to the left of the first nonzero digit, for the first number, we need to add two zeros as seven is the third digit position:

0.0761.

Next, we need to add three zeros as 5 would be the fourth digit:

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What does an electricity neutral atom have the same number of?
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d) protons and electrons.

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