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Ira Lisetskai [31]
3 years ago
9

The formation of the moon may have caused the Paleozoic extinction.

Chemistry
2 answers:
nadya68 [22]3 years ago
4 0

Answer:False:)

Explanation:

vaieri [72.5K]3 years ago
3 0
The answer is False. The formation of the moon did not cause the Paleozoic extinction. The moon formed during the Precambrian era.
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True or false
Ivanshal [37]

Answer:

true because of the elements

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3 years ago
If 97.7 ml of silver nitrate solution reacts with excess potassium chloride solution to yield 0.326 g of precipitate, what is th
BlackZzzverrR [31]

The complete balanced chemical reaction is written as:

AgNO3 + KCl ---> AgCl + KNO3 

where AgCl is our precipitate

 

So calculating for moles of AgCl produced: MM AgCl = 143.5 g/mol

moles AgCl = 0.326 g / (143.5 g/mol) = 2.27 x 10^-3 mol

we see that there is 1 mole of Ag per 1 mole of AgCl so:

moles Ag = 2.27 x 10^-3 mol

 

The molarity is simply the ratio of number of moles over volume in Liters, therefore:

Molarity = 2.27 x 10^-3 mol / 0.0977 L

<span>Molarity = 0.0233 M</span>

4 0
3 years ago
The number 4012 has how many significant figures?​
grandymaker [24]

Answer:

8 figures.

Explanation:

3 0
3 years ago
Is Columns of elements in the periodic table are called periods correct in the underlined sentence
SSSSS [86.1K]
I don't know sorry I really need point
6 0
3 years ago
An unknown substance has a density of 56 g/cm3. Its volume is 3.5 cm.
postnew [5]

Answer:

<h3>The answer is 196 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 56 × 3.5

We have the final answer as

<h3>196 g</h3>

Hope this helps you

3 0
3 years ago
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