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Tanya [424]
3 years ago
6

Answer this ASAP please!! Question: How many magnesium atoms does magnesium oxide need? (Science) (ONLY ANSWER IF YOU KNOW WHAT

IT IS)

Chemistry
1 answer:
aliina [53]3 years ago
7 0

Answer:

40.3 for the unit that represents the minimum amount of magnesium oxide I beilieve.

Explanation:

Magnesium atoms are heavier than oxygen atoms, so we expect more than 50% of magnesium in the weight composition. Taking just one atom of Mg and one atom of O you will get a mass of 16.0 + 24.3 = 40.3.

Hope this helps! Please tell me if you have any questions :))

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What is the density of an<br> object that has a mass of<br> 120 g and volume of 5 ml?
Viktor [21]

The density of an  object ρ = 24 g/ml

<h3>Further explanation</h3>

Given

mass of an object = 120 g

volume = 5 ml

Required

The density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

Input the value :

ρ = 120 g : 5 ml

ρ = 24 g/ml

3 0
3 years ago
The volume of a sample of gas at 273 K is 200. liters. If the volume is doubled at constant pressure, what will be the new tempe
gayaneshka [121]

Answer:

New temperature = 546 K

Explanation:

Given that,

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We need to find the new temperature if the volume is doubled.

The relation between temperature and volume is direction. If volume is doubled, it means the temperature gets also doubled.

New temperature of the gas = 2(273) = 546 K

8 0
3 years ago
Which atmospheric layer is closest to Earth's surface?
Sedaia [141]

Answer:

The answer is the troposphere

Explanation:

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5 0
3 years ago
What is the mass of 10.0 cm the 3rd power of water
yKpoI14uk [10]

If you mean cubic cm, then it will be about 10 grams

5 0
4 years ago
The reaction of 56 gram of iron in the laboratory produces 14.1 grams of iron. What is the theorical amount of Fe moles produce
IceJOKER [234]

Answer:

0.252 moles

Explanation:

Since 14.1 g of iron is produced and the molar mass of iron is 55.85 g, the number of moles of iron produced is gotten from

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So, n = m/M

n = 14.1 g/55.85 g/mol

n = 0.252 moles of Fe.

So, the theoretical amount of Fe moles produce in the reaction is 0.252 mol

5 0
3 years ago
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