All categories

2 years ago

Which equation is balanced? “Hint...count the atoms of each element. Only compare like elements!

Chemistry

1 answer:

lisabon 2012 [21]2 years ago

8 0

Answer:

2Mg + O2 = 2MgO

Explanation:

Al + 3F2 = AlF3 ..... F has 6 on the left and 3 on the right.

Na + F2 = 2NaF ..... Na has 1 on the left and 2 on the right.

2Al + 3O2 = Al2O3 .... O has 6 on the left and 3 on right.

You might be interested in

A 44% wt/wt solution of H2SO4 has a density of 1.343g/ml. What mass of H2SO4 is 60ml of this solution?

horsena [70]

<u>Answer:</u> The mass of sulfuric acid present in 60 mL of solution is 34.1 grams

<u>Explanation:</u>

We are given:

44 % (m/m) solution of sulfuric acid. This means that 44 grams of sulfuric acid is present in 100 grams of solution.

To calculate volume of a substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of solution = 1.343 g/mL

Mass of solution = 100 g

Putting values in above equation, we get:

$1.343g/mL=\frac{100g}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{100g}{1.343g/mL}=77.46mL$

To calculate the mass of sulfuric acid present in 60 mL of solution, we use unitary method:

In 77.46 mL of solution, mass of sulfuric acid present is 44 g

So, in 60 mL of solution, mass of sulfuric acid present will be = $\frac{44g}{77.46mL}\times 60mL=34.1g$

Hence, the mass of sulfuric acid present in 60 mL of solution is 34.1 grams

3 0

3 years ago

A neutral atom of helium has 2 protons and _____ electrons. (Enter a whole number.)

Mariulka [41]

Answer:

2 electrons

Explanation:

Since the atomic structure is at it's neutral state

6 0

2 years ago

A solution is a special mixture where you cannot see the individual substances that are mixed. You look at two bowls of ice crea

Nutka1998 [239]

Wouldn't be a then not c if both were solutions.

3 0

3 years ago

Credible sources always identify the author. Please select the best answer from the choices provided T F

Lostsunrise [7]

This is a true statement because the author can then be further looked into and researched

5 0

3 years ago

Read 2 more answers

Which of the following is an example of erosion under the force of gravity?

taurus [48]

the answer i believe is b:saltation, which is a form of wind erosion

4 0

3 years ago

Which equation is balanced? “Hint...count the atoms of each element. Only compare like elements!​

Which equation is balanced? “Hint...count the atoms of each element. Only compare like elements!