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3 years ago

Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant figures.

Chemistry

1 answer:

NISA [10]3 years ago

5 0

Answer:

102.0 g/mol

Explanation:

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If ammonia were formed from dalton's simplest formula of one atom of each element, what would he have concluded about the relati

baherus [9]

He would have concluded that the order of operations would be different. This therefore would affect the periodic table's order.

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3 years ago

What is the mass of a sample of alcohol (specific heat = 2.4 J/gC), if it requires 4780 J of heat to raise the temperature by 5.

insens350 [35]

The mass of a sample of alcohol is found to be = m = 367 g

Hence, it is found out that by raising the temperature of the given product, the mass of alcohol would be 367 g.

Explanation:

The Energy of the sample given is q = 4780

We are required to find the mass of alcohol m = ?

Given that,

The specific heat given is represented by = c = 2.4 J/gC

The temperature given is ΔT = 5.43° C

The mass of sample of alcohol can be found as follows,

The formula is c = $\frac{q}{mt}$

We can drive value of m bu shifting m on the left hand side,

m = $\frac{q}{ct}$

mass of alcohol (m) = $\frac{4780}{(2.4)( 5.43)}$

m = 367 g

Therefore, The mass of the given sample of alcohol is

m = 367g

It requires 4780 J of heat to raise the temperature by 5.43 C in the process which yields a mass of 367 g of alcohol.

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3 years ago

Give examples of five polymers that are manufactured using technological processes

matrenka [14]

Plastics, paints, rubber, foams, adhesives, sealants, varnishes and many more.

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3 years ago

How many mols are present in 5.24 x 1024 atoms of Carbon tetra fluoride?

Free_Kalibri [48]

Answer: 5.44×10226.022140857(74)×1023⋅mol−1.

Explanation: So the answer is approx. 0.10⋅mol

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2 years ago

When 1 mole of carbon is burned, carbon dioxide is produced, and 393 kilojoules (kJ) of energy are released. If this reaction is

EleoNora [17]

The energy of 393 kJ is released as heat. Then, the container will experience an increase of temperature and, given that it is sealed, also an increase of pressure.

The increase of temperature results from the heat developed during the reaction.

The increase of pressure results from the fact that that the solid carbon will become gaseuos carbon dioxide. This gas will occupy a larger volume than the solid carbon and also this elevation of the temperature will make the pressure of the gas inside the container increase.

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3 years ago