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crimeas [40]
3 years ago
11

What volume of methanol should be used to make 1.25 l of a 21.0 by volume solution

Chemistry
1 answer:
Nimfa-mama [501]3 years ago
6 0
Answer:
262.5 mL

Explanation:
21% of 1.25 L volume is methanol, so the amount of methanol is,
0.21 × 1250 mL = 262.5 mL
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According to the law of conservation of mass, if five atoms of hydrogen are used
Zanzabum

Answer:

the law of conservation says the product side will have 5 hydrogen, unless a coefficient is added.

5 0
3 years ago
Name an element which matches the description
ikadub [295]

1) Uranium

2) Carbon in the form of graphite

3) Palladium

Explanation:

1) In the nuclear reactor the fuel is represented by some uranium isotopes which are easily fissionable.

2) Graphite is made from carbon sheets in which there are free electrons that are moving freely so the carbon, in this form, is able to conduct electricity.

3) Commonly inert electrodes are made from platinum (Pt) or gold (Au) metals, because of the propriety of this metals to not interact chemically very easily with various substances.

Learn more:

uranium isotopes

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graphite

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6 0
3 years ago
. For the reaction 2HNO3 + Mg(OH), → Mg(NO3)2 + 2H20, how many grams of magnesium nitrate are produced from 8.00 mol of nitric a
GREYUIT [131]

Mass of Magnesium nitrate produced : 593.2 g

<h3>Further explanation</h3>

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

2HNO₃ + Mg(OH)₂ → Mg(NO₃)₂ + 2H₂0

mol HNO₃ = 8

From the equation, mol ratio of HNO₃ : Mg(NO₃)₂ = 2 : 1, so mol Mg(NO₃)₂ :

\tt \dfrac{1}{2}\times 8=4~moles

Mass Mg(NO₃)₂(MW=148,3 g/mol) :

\tt mass=mol\times MW\\\\mass=4\times 148,3 g/mol\\\\mass=593.2~g

6 0
3 years ago
Haw does an atom change if all of it’s electrons removed
I am Lyosha [343]
The atom becomes positively charged.
Hope this helps!
8 0
3 years ago
Solve using significant figures <br> 8.647 + 45.969
Murrr4er [49]

Answer:

54.616

Explanation:

8.647 + 45.969

or rewrite for easier look:

45.969 +

 8.647 =

54.616

Hope this helped :3

 

5 0
3 years ago
Read 2 more answers
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