All categories

3 years ago

An isotope of iron has 28 neutrons. If the atomic mass of the isotope is 54, how many protons does it have?

Chemistry

2 answers:

Crazy boy [7]3 years ago

5 0

26 because you need to do 54-28=26
The atomic mass number is the number of protons AND neutrons together.

elena-14-01-66 [18.8K]3 years ago

4 0

An isotope is a varying in the neutrons because the protons NEVERRRR change!!

54 - 28 = <span>26
</span>
Answer: 26

You might be interested in

What is the central conflict in "Ellen foster"?

photoshop1234 [79]

major conflict. Ellen continually suffers abuse by her neglectful caretakers and searches for a stable home and loving family. rising action. Ellen is placed in a number of temporary homes, all of which are unhappy, and she longs for a home where she is loved and cared for.

7 0

3 years ago

Given the chemical reaction: Hg2+(aq) + Cu(s) + Hg(s) + Cu2+(aq)

Pavel [41]

Answer: When the reaction reaches equilibrium, the cell potential will be 0.00 V

Explanation:

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

The equilibrium is dynamic in nature and the reactions are continuous in nature. Rate of forward reaction is equal to the rate of backward reaction.

The standard emf of a cell is related to Gibbs free energy by following relation:

$\Delta G=-nFE^0$

The Gibbs free energy is related to equilibrium constant by following relation:

$\Delta G=-2.303RTlog K$

For equilibrium $\Delta G=0$

Thus $0=-nFE^0$

$E^0=0$

Thus When the reaction reaches equilibrium, the cell potential will be 0.00 V

5 0

3 years ago

Why a finely powdered sample should be used in a melting point measurement?

lapo4ka [179]

because it a essential for good heat transfer

6 0

3 years ago

A solid substance turns directly into a gas. Which term describes this change?

igomit [66]

Sublimation.

Since evaporation is liquid into gas, melting is solid into liquid and deposition is the geological process where sediments are added to land forms.

8 0

3 years ago

Read 2 more answers

Its difficult to measure the volume of gas. Why??

SVEN [57.7K]

Answer:

Its difficult to measure the volume of gas because its hard to make sure its only a uniform layer of gas in what ever youre measuring in it.

Explanation:

hope it help u

4 0

3 years ago