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3 years ago

I need help pls and thank you

Chemistry

1 answer:

nydimaria [60]3 years ago

3 0

It’s 1 mark k/u thanks

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This reason would mainly be because the "earth would have moderate temperature" as more Venus does not. When having the correct answer moderate temperature, this would allow for the water to be supplied. But, as for it not to have the correct and moderate temperature, this would then allow for it not to have to supply of water.

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4 years ago

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Wine goes bad soon after opening because the ethanol in it reacts with oxygen gas from the air to form water and acetic acid , t

Fynjy0 [20]

Answer:

7.00 g

Explanation:

There is some information missing. I think this is the complete question:

<em>Wine goes bad soon after opening because the ethanol CH₃CH₂OH in it reacts with oxygen gas O₂ from the air to form water H₂O and acetic acid CH₃COOH, the main ingredient of vinegar. What mass of ethanol is consumed by the reaction of 4.86g of oxygen gas? Round your answer to 3 significant digits.</em>

<em />

First, we have to write the balanced equation.

CH₃CH₂OH + O₂ ⇒ CH₃COOH + H₂O

Then, we can establish the following relations:

The molar mass of O₂ is 32.0 g/mol
The molar ratio of O₂ to CH₃CH₂OH is 1:1
The molar mass of ethanol is 46.1 g/mol.

The mass of ethanol that reacts with 4.86 g of oxygen is:

$4.86gO_{2}.\frac{1molO_{2}}{32.0gO_{2}} .\frac{1molEt}{1molO_{2}} .\frac{46.1gEt}{1molEt} =7.00gEt$

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3 years ago

Thomson's plum pudding model of the atom was most directly replaced or refuted by

andriy [413]

Answer:

A. Rutherford's discovery that atoms contain a nucleus

Explanation:

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HC1 solution is mostly water. NaOH solution is mostly water. When 50mL of HC1 is mixed with 50mL of NaOH, what is the final mass

elixir [45]

Since water has a density of about 1g/mL, and we are assuming HCl and NaOH are mostly water, the total mass of the 2 solutions is 100 g.
Due to the conservation of mass, the mass of product must equal the total mass of reactant, therefore the final mass must also be 100 g.

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4 years ago

Name two physical properties of gold.

Olin [163]

Answer:

All of the above.

Explanation:

Gold is yellowish it is soft and malleable and also very dense.

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