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Rom4ik [11]
2 years ago
12

The force of gravity between a planet and its moon is 371 N. If the planet has a mass of 4*10^ 22 kg and the moon has a mass of

5*10^ 5 kg what is the distance between their centers ?
Chemistry
1 answer:
lawyer [7]2 years ago
8 0

Answer: Its the universal law of gravitation

Explanation:

The force between two objects, due to their masses, is called the gravitational force ... Example 1:What is the gravitational force between the Earth and the Moon? ... The sun has a mass of 2.0 x 1030 kg and a radius of 7.0 x 105 km. ... the Earth and Mars is 8.7 x 1016 N. The distance between the two planets is 5.5 x 1010m.

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1 year ago
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A higher temperature of fresh concrete results in a __________ hydration of cement.
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Answer:

more rapid

Explanation:

A higher temperature of fresh concrete results in a more rapid hydration of cement. This causes reduction in the setting time of the cement, also known as accelerated setting of the cement.

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2 years ago
If 3.18 x 10^23 atoms of iron react with 67.2 L of chlorine gas at STP, what is the maximum
spin [16.1K]

84.34 grams of grams of iron (III) chloride that can be produced is maximum because Fe is the limiting reagent in this reaction and chlorine gas is excess reagent.

Explanation:

Balanced chemical equation:

2 Fe + 3 Cl2 → 2 FeCl3​

DATA GIVEN:

iron =  atoms

mass of chlorine gas = 67.2 liters

mass of FeCl3 = ?

number of moles of iron will be calculated as

number of moles = \frac{total number of atoms}{Avagaro's number}

number of moles = \frac{3.18 x 10^23}{6.022x 10^23}

number of moles = 0.52 moles of iron

moles of chlorine gas

number of moles = \frac{mass}{molar mass of 1 mole}

Putting the values in the equation:

n = \frac{67200}{70.96}               (atomic mass of chlorine gas = 70.96 grams/mole)

   = 947.01 moles

Fe is the limiting reagent so

2 moles of Fe gives 2 moles of FeCl3

0.52 moles of Fe will give

\frac{2}{2} = \frac{x}{0.52}

0.52 moles of FeCl3 is formed.

to convert it into grams:

mass = n X atomic mass

         = 0.52 x 162.2                   (atomic mass of FeCl3 is 162.2grams/mole)  

<h3>           = 84.34 grams         </h3>
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How many moles of N2 are essential for generating 0.08 moles of Li3N in the given reaction?6Li N2 2Li3N
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<span>08 moles Li3N * 1mole N2/2moles Li3N = 0.04 </span>
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