Using the periodic table determine the number of neutrons in 16O

Answer:

B

Explanation:

Answer:

David R. Ashbaugh

Explanation:

David R. Ashbaugh is a Canadian police officer known for his extensive research on the friction ridge identification, introducing for the first time the use of the term ridgeology in forensic identification and the ACE-V methodology.

Answer:

The mass is 20, 89 grams of He.

Explanation:

We calculate the weight of 1 mol of He, from the atomic weight of each element obtained from the periodic table: Weight 1 mol He= 4, 0020602 g. 1 mol He-----4, 0020602 g. 5,22 mol He---x= (5,22 mol He x4, 0020602 g)/ 1 mol He= 20, 89 g

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The mass of 5.22 mol of He will be 20.84 grams.

We have 5.22 mol of He.

We have to calculate its Mass.

Helium is a chemical element with the symbol He and atomic number 2. It is a gas which is colorless, odorless, tasteless, non-toxic, inert and monatomic.

According to the question -

Number of moles of Helium = 5.22 mol

Now, I mole of Helium will have its mass equal to its Atomic weight. Therefore -

Mass of 1 mole of He = 4.002602 g

So, the mass of 5.2 mol of He will be = 5.2 x 4.002602 = 20.84 grams

Hence, the mass of 5.22 mol of He will be 20.84 grams.

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Answer:

Because the equilibrium constant is only at constant at temperature. Changing the temperature changes the Ka.

Answer:

For things that we can not directly observe, we can use indirect observation – which studies the consequences of an action or process. For example, we cannot see the Earth's magnetic field, but we detect it by its effect on a compass.

Answer:

the atom has changed in many ways, we have found sizes, masses, electrons, neutrons, and more.

Explanation: