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2 years ago

How is the melting point of a substance recorded

Chemistry

1 answer:

GrogVix [38]2 years ago

6 0

1. slowly heat stubstance.

2. once the substance is at the most liqued state take the temp. that's the melting point of that subtance.

hope that helps, any other questions feel free to DM me dont wate your points. :)

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2H2 + O2 --> 2 H2O + How many moles of oxygen is required to produce 13.3 moles of water?

LenKa [72]

Answer:

Explanation:

Let the number of moles of oxygen = x

2H2 + O2 --> 2 H2O

x 13.3

Since the balance number for oxygen is 1 and the balance number for water is 2, you must set up a proportion. (Those balance numbers represent the number of moles).

1/x = 2 / 13.3 Cross Multiply

2*x = 13.3 Divide both sides by 2

2x/2 = 13.3/2

x = 6.65

You need 6.65 moles of oxygen.

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1 year ago

The harmonic law would suggest that Neptune will take how much time to orbit the Sun than Mercury?

Delicious77 [7]

The harmonic law would suggest that Neptune will take a longer amount of time to orbit the sun than Mercury. That's what I think anyways

8 0

2 years ago

Read 2 more answers

Calculate the equilibrium constant for the reaction using the balanced chemical equation and the concentrations of the substance

Oliga [24]

Answer:

4.75 is the equilibrium constant for the reaction.

Explanation:

$CO(g)+H_2O(g)\rightleftharpoons CO_2(g)+H_2(g)$

Equilibrium concentration of reactants :

$[CO]=0.0590 M,[H_2O]=0.00600 M$

Equilibrium concentration of products:

$[CO_2]=0.0410 M,[H_2]=0.0410 M$

The expression of an equilibrium constant is given by :

$K_c=\frac{[CO_2][H_2]}{[CO][H_2O]}$

$K_c=\frac{0.0410 M\times 0.0410 M}{0.0590M\times 0.00600 M}$

$K_c=4.75$

4.75 is the equilibrium constant for the reaction.

3 0

2 years ago

Graphite, an allotrope of carbon, is converted into cubic diamond through a process that may take a billion years or longer.

andriy [413]

Answer:

The given statement is true.

Explanation:

The given statement is true.

As per an estimate, to convert graphite into diamond nearly 1 billion to 3.3 billion years of time is required.

Graphite converts into diamond when high-pressure is applied deep in the earth core.

5 0

2 years ago

Draw a mechanism for the first step of the reaction between methyllithium (CH3Li) and acetone. Then answer the two multiple choi

pogonyaev

Answer:

See the attached image

Explanation:

The first step is the production of the carboanion in the $CH_3Li$ compound. We will get the negative charge on the methyl group and the positive charge in the Li atom.

Then the carboanion can attack the acetone. The double bond of the oxo group would delocalized upon the oxygen, generating a positive charge in the carbon that can be attacked by the carboanion formaiting a new C-C bond.

8 0

3 years ago