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Zielflug [23.3K]
2 years ago
13

(3 x 104) (4 x 1023)

Chemistry
2 answers:
Ksivusya [100]2 years ago
3 0

Answer:

1 x 10^28

Explanation:

  • this what the scientific notati0N
Soloha48 [4]2 years ago
3 0

Answer:

1276704

Explanation:

Do what is in parenthesis first then multiply them together.

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How is the atomic mass of an element calculated? A. by determining the number of electrons in the outer orbital B.by determining
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By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.

7 0
3 years ago
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An antacid tablet contains 640.0 mg of magnesium oxide per tablet.
Salsk061 [2.6K]

Answer:

317.6 mL

Explanation:

Step 1: Write the balanced neutralization equation

MgO + 2 HCl ⇒ MgCl₂ + H₂O

Step 2: Calculate the mass corresponding to 640.0 mg of MgO

The molar mass of MgO is 40.30 g/mol. The moles corresponding to 640.0 mg (0.6400 g) of MgO are:

0.6400 g × (1 mol/40.30 g) = 0.01588 mol

Step 3: Calculate the moles of HCl that react with 0.01588 moles of MgO

The molar ratio of MgO to HCl is 1:2. The moles of HCl are 2/1 × 0.01588 mol = 0.03176 mol

Step 4: Calculate the volume of 0.1000 M HCl that contains 0.03176 moles

0.03176 mol × (1 L/0.1000 mol) = 0.3176 L = 317.6 mL

3 0
3 years ago
What happens to the area of the world off the coast of Peru
joja [24]

Answer:The Peruvian west coast bordering the Pacific Ocean is a long desert strip that stretches from the departments of Tumbes in the north bordering Ecuador, to Tacna in the south bordering Chile for a total length of 1,555 miles or 2,500 km. The average temperature from December to April is 25 to 28C or 53 to 59F and the average temperature from May to November is 12 to 15C or 53 to 59F.

The coast covers about 10% of the territory but is home to more than 50% of the population. Large cities such as Lima, the capital, Trujillo, Chiclayo and Tacna are located in the coast. Cities along the coast are the center of economic activity attracting people from the interior of the country looking for economic prosperity.

idk hope this helps !!!!

5 0
3 years ago
Please help me answer this
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Answer:

1.01

Explanation:

you have to trust me

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1 year ago
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Calculate with the correct number of significant figures 2.0 x 10^5 x 3.00 x 10^8
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Answer:

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3 years ago
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