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Iteru [2.4K]
3 years ago
13

Question 2 2 points) Which of the atoms shown has an atomic number of 42 1 2 4 7

Chemistry
1 answer:
vaieri [72.5K]3 years ago
7 0

Answer:

4 is the answer

Explanation:

i am not sure for this question

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A Chemical Reactions Takes Place When
lina2011 [118]

Answer:

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation:

6 0
3 years ago
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What is the volume of a piece of aluminum if the mass is 150g and the density.is 2.70 g/cm3
zepelin [54]

Answer:

The answer is

<h2>55.56 cm³</h2>

Explanation:

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

volume =  \frac{mass}{density}  \\

From the question

mass of aluminum = 150 g

density = 2.7 g/cm³

The volume is

volume =  \frac{150}{2.7}  \\  = 55.5555555...

We have the final answer as

<h3>55.56 cm³</h3>

Hope this helps you

3 0
3 years ago
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How many liters of a 0.0550 M NaF solution contain 0.163 moles of NaF?
Kobotan [32]

Answer : The volume of solution will be 2.96 liters.

Explanation :

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

In this question, the solute is NaF.

Now put all the given values in this formula, we get:

0.0550M=\frac{0.163mole}{\text{Volume of solution (in L)}}

\text{Volume of solution (in L)}=\frac{0.163mole}{0.0550M}

\text{Volume of solution (in L)}=2.96L

Therefore, the volume of solution will be 2.96 liters.

3 0
3 years ago
PLEASE HELP A woman travels to Canada where milk is sold in liters. She wants to buy enough milk at the grocery store to last 5
mars1129 [50]

Answer:

About 2 liters

Explanation:

Since 1 gallon equals 3.785 liters, you figure out how many liters per week she uses by 3.785 x 0.75 which is 2.83875. Then divide that by 7 which is 0.405535 liters per day. Then multiply that by 5 days which is 2.027 liters in 5 days.

8 0
4 years ago
Provide the names of 2 stars that are dimmer than the Sun and provide their absolute magnitude and type of star.
Softa [21]

Explanation:

Epsilon Eridani - 3.72

61 Cygni AB - 4.80

5 0
3 years ago
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