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3 years ago

Calculate the mass number of an atom that has 92 protons and 108 neutrons

1 answer:

6 0

What element would have 73 protons and 108 Neutrons?

Because there are 73 Protons and that equals the Atomic Number .. what is the element that is 73 as its atomic number?

Tantalum

Because we know that there are 73 Protons and 108 Neutrons ..we could do this 73+108 = 181

So its name is Tantalum-181

hope this helps.

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HELPPPP PLEASEEEE

Rama09 [41]

1.025 moles of NaCl are present in a solution with a molarity of 8.20M and 125 mL of solution. Details about molarity can be found below.

<h3>How to calculate molarity?</h3>

The number of moles of a solution can be calculated by multiplying the molarity of the solution by its volume. That is;

no of moles = molarity × volume

According to this question, a solution has a molarity of 8.20M and volume of 125 mL of solution.

no of moles = 8.20 × 0.125

no of moles = 1.025moles

Therefore, 1.025 moles of NaCl are present in a solution with a molarity of 8.20M and 125 mL of solution.

Learn more about number of moles at: brainly.com/question/14919968

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6 0

2 years ago

1. Cancer is a disease in which cells

levacccp [35]

Answer:

1. a

2. a.

3. b.

4. a.

5. c.

6. b.

7. a.

8. c.

Explanation:

7 0

3 years ago

Which type of medium do S waves travel through

stiv31 [10]

P Waves: Compressional waves that travel through the Earth. Fastest waves. S Waves: Shear waves travel through the solid part of the Earth.

I hope this helps

8 0

3 years ago

BRAINLIEST

NikAS [45]

Answer:

The correct answer is 6.31 M

Explanation:

The molecular weight (MM) of NaOH is calculated as follows:

MM(NaOH) = Molar mass Na + Molar mass O + Molar mass H

= 23 g/mol + 16 g/mol + 1 g/mol

= 40 g/mol

We need the MM to convert from grams to moles. The molarity (moles of solute per liter of solution, in mol/L) can be calculated by dividing the mass into the volume in liters (195 ml = 0.195 L) and then multiplying by the MM as follows:

M = 49.24 g/0.195 L x 1 mol/40 g = 6.31 mol/L = 6.31 M

5 0

4 years ago

Read 2 more answers

For questions #14 – 17, write an equation for the reaction of magnesium chloride and sodium oxide to produce magnesium oxide wit

solniwko [45]

14. $MgCl_{2} + Na_{2}O$

Both are ionic compounds and therefore oxidize to certain states. Mg has an oxidation state of +2, Cl has an oxidation state of -1, Na has an oxidation state of +1, and O has an oxidation state of -2.

15. $MgO + NaCl$

Using the same oxidation states, you write the formulas of your products.

16. $MgCl_{2} + Na_{2}O -\ \textgreater \ MgO + 2NaCl$

You know that you must have the same number of elemental atoms on one side of the reaction as you do on the other. With this balanced equation, you see that both the left and right sides have 1 Mg, 2 Cl, 2 Na, and 1 O.

As a bonus, you can also add in the states of the compounds:

$MgCl_{2} (aq) + Na_{2}O (aq) -\ \textgreater \ MgO (s) + 2NaCl (aq)$

17. This is a double replacement reaction (also called a metathesis reaction, or a double displacement reaction), because one element within one compound basically switches places with the element in the other compound. It is also a precipitation reaction, because a precipitate (MgO) is formed.

Hope this is helpful!

6 0

3 years ago

Read 2 more answers