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3 years ago

Which statement describes the masses of the particles that make up an atom?

1 answer:

6 0

The mass of the atom is equal to the sum of the number of protons and the number of neutrons. In a neutral atom, the number of protons is equal to the number of electrons. The atomic number meanwhile of an atom is equal to the number of protons of the atom.

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1. The most important agent of chemical weathering is

Luden [163]

Answer:

sulfur

Explanation:

without sulfur you can not grow any food

4 0

4 years ago

How many electrons are there in an atom of carbon?

Mashutka [201]

Answer:

if its a neutral atom there should be 6 electrons because there are 6 protons

Explanation:

8 0

3 years ago

A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How man

Effectus [21]

Answer:

2.3 g NaCl

Explanation:

Given the concentration of the NaCl solution = 0.92% (w/v)

It means that 0.92 g of NaCl is present in 100 mL of water.

Thus,

100 mL of water contains 0.92 g of NaCl

To find, amount of NaCl in 250 mL of water

So,

1 mL of water contains $\frac {0.92}{100}\ g$ of NaCl

250 mL of water contains $\frac {0.92}{100}\times 250\ g$ of NaCl

<u>2.3 g of NaCl is present in 250 mL of this solution.</u>

8 0

3 years ago

A student is able to lift 500N weight by applying 100N. What is the mechanical advantage of a simple machine?

Semmy [17]

Explanation:

Load=500N

Effort=100N

Now,

We have,

Mechanical advantage= Load / effort

= 500/100

Therefore, mechanical advantage is 5.

5 0

3 years ago

Determine the value of x and write the complete chemical formula of the hydrate

Annette [7]

In order to determine the formula of the hydrate, [Anhydrous Solid⋅xH2O], the number of moles of water per mole of anhydrous solid (x) will be calculated by dividing the number of moles of water by the number of moles of the anhydrous solid (Equation 2.12.

7 0

3 years ago