3 years ago

Please help me with chem, it would be very appreciated!

1 answer:

5 0

To determine the shapes of molecules, we must become acquainted with the Lewis electron dot structure. Although the Lewis theory does not determine the shapes of molecules, it is the first step in predicting shapes of molecules. The Lewis structure helps us identify the bond pairs and the lone pairs.

Please mark BRAINLIEST.

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Which of the following happen because of an increase in thermal energy/temperature? (Select all that apply)

swat32

A b c , i think ...

7 0

3 years ago

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HRISTINA HERRERA: Attempt 1

Lunna [17]

Answer:

7.5 g of hydrogen gas reacts with 50.0 g oxygen gas to form 57.5 g of water.

Explanation:

Here we have the check if the mass of the reactants is equal to the mass of the products.

Reactants

$7.5+50=57.5\ \text{g}$

Products

$57.5\ \text{g}$

The data is consistent with the law of conservation of matter.

Reactants

$50+243=293\ \text{g}$

Products

$206+97=303\ \text{g}$

The data is not consistent with the law of conservation of matter.

Reactant

$17.7+34.7=52.4\ \text{g}$

Products

$62.4\ \text{g}$

The data is not consistent with the law of conservation of matter.

Only the first data is consistent with the law of conservation of matter.

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3 years ago

This is the process where fossil fuels, forests, or other carbon-containing substances are burned, adding more carbon dioxide to

sattari [20]

The process where fossil fuels, forests, or other carbon-containing substances are burned, addin more carbon dioxide to the air is the combustion.

Some examples of combustion are:

Fossil fuel:

Carbon + O2

C + O2 -> CO2

Forests (wood)

Wood = cellulose = [C6H10O5]n

[C6H10O5]n + 6nO2 = 6n CO2 + 5n H2O

So, in general the combustion of organic matter produces CO2 and water.

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3 years ago

40 liters is equal to?<br> A. 40 cm3<br> B. 40 m3<br> C. 4,000 ml

9966 [12]

B I think sorry if I’m wrong

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How much energy is released if a sample loses 0.001 kg mass through radioactive decay?

stealth61 [152]

Explanation:

because the energy it can't be calculated