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Darya [45]
3 years ago
15

ASAP PLEASE

Chemistry
1 answer:
dimaraw [331]3 years ago
6 0
The mass of Hydrogen is 2 g/mol
The mass of Helium is 4 g/mol
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What statement best explains how life functions a unicellular organism are carried out?​
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Answer:

The structures in the cell work together to perform its life functions

Explanation:

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What is the density of a liquid that has a mass of 27g and a volume of 30mL?
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  • Answer: 7 g/cm to the third power
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3 years ago
One difference between mixtures and pure substances is that
defon

Answer:

The mixture is made up of different atoms and pure substance is made up of same type of atom.

The main difference is that mixture can be separated into its component by physical mean while pure substances can not be separated by physical process

Explanation:

Mixture:

  • The properties of the mixture are not same and contains the properties of all those component present in it.
  • it is a combination of one or more Pure substances and can be separated by simple physical methods.
  • it have varying boiling and melting point

Examples are:

  • mixture of salt and sand
  • Salt water is mixture of water and NaCl and can be separated by physical mean.
  • Alloys: its a mixture of different metal
  • Air: mixture of gases

Pure Substance:

Pure substances are those made of same type of atoms all elements and compounds are pure substances.

  • it can not be separated by simple physical mean
  • it have very constant and consistent melting and boiling point

Examples are:

  • Water : contain only water molecule
  • All elements: all elements are pure substance made of same atoms
  • All compounds: can not be separated by physical mean.

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A plane mirror is useful for seeing:
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C. A nearly identical image.
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True or false: the most easily ionizable elements are the most electronegative.
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<span>False, This is because when you can easily ionize and atom or the chances of it being ionizable are quite high, it means that that particular atom have very low ionization potential that is the reason why it was easily ionizable An atom with a high ionization power and a firmly negative electron fondness will both pull in electrons from different particles and oppose having its electrons taken away; it will be an exceedingly electronegative molecule.</span>
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2 years ago
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