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ASHA 777 [7]
3 years ago
11

Is Helium a compound,element, or.mixture

Chemistry
1 answer:
dusya [7]3 years ago
5 0

Answer:

element

Explanation:

we know that helium is a pure substance although helium atoms are sometimes mixed with their isotopes it is still the same element. since there is no other element combined with helium this makes it an element.

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I need help with my math but you can only choose one correct answer​
Anika [276]

Answer:

Explanation:

Decomposition is the answer.

If a compound breaks into two or more parts then it is called decomposition.

7 0
3 years ago
Read 2 more answers
For the reaction ? Ch3oh+? O2 →? Hco2h+? H2o , what is the maximum amount of hco2h (46.0254 g/mol) which could be formed from 6.
saw5 [17]

Answer:- 9.98 grams.

Solution:- The given balanced equation is:

CH_3OH+O_2\rightarrow HCO_2H+H_2O

From this equation, there is 1:1 mol ratio between methanol and formic acid. We start with given grams of methanol and convert them to moles. Then using mol ratio the moles of foramic acid are calculated and finally converted to grams on multiplying by it's molar mass.

The calculations could easily be done using dimensional analysis as:

6.95gCH_3OH(\frac{1molCH_3OH}{32.0419g})(\frac{1molHCO_2H}{1molCH_3OH})(\frac{46.0254gHCO_2H}{1molHCO_2H})

= 9.98gHCO_2H

Hence, 9.98 grams of formic acid can be formed from 6.95 grams of methanol.

8 0
3 years ago
What elements are made from the body
Iteru [2.4K]

Answer:

hydrogen oxygen carbon and nitrogen

6 0
3 years ago
How do you find the oxidation number on an atom
Archy [21]
The atom is 2 with the one in the car in a row
7 0
3 years ago
What are non-examples of physical property?
Svetach [21]

Answer:

examples: mass, density, color, boiling point, temperature, and volume. non examples- anything that's NOT a physical property will be a non-example. emotion is not a physical property. ... property or behavior of a substance when it undergoes a chemical change or reaction.

Physical properties can be observed or measured without changing the composition of matter. ... Color, phase, odor and boiling point are the physical properties. Reactivity with oxygen depends on the chemical nature of object, thus, it is not a physical property.

Explanation:

Hope this helps!

3 0
3 years ago
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