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alekssr [168]
3 years ago
9

Why is a solution not a pure substance

Chemistry
1 answer:
Firlakuza [10]3 years ago
8 0
It is not a pure substance, because a solution are mixed chemicals in a way that the molecules are not bonded with one another. Thus, separating them from compounds and elements, which are pure substances.
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Someone help please :)
zlopas [31]

6.79 x 10⁶

<h3>Further explanation  </h3>

Scientific Notation consists of 2 parts  

1. the first part: the first digit followed by the decimal point  

2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point  

To add/subtract, the exponents must be the same and then add/subtract the coefficient

  • convert the largest exponent

\tt 7.2\times 10^6\rightarrow 72\times 10^5

  • subtract the coefficients

\tt =(72-4.1)\times 10^5\\\\=67.9\times 10^5\rightarrow 6.79\times 10^6

7 0
3 years ago
Is 2H2 + O2=2H2O a balanced equation
Mnenie [13.5K]

Explanation:

Yes, the equation is balanced. There are the same number of Hydrogen (H) and Oxygen (O) atoms on both sides of the equation.

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3 years ago
Pure water at 25°C has a pH of<br> (1) 1 (2) 5 • (3) 7<br> (4) 14
Marysya12 [62]

Answer:

7. .........................

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Margaret [11]

Answer: 30.27 g

Explanation:

Since the silver is in units of atoms, we have to use Avogadro's number and molar mass.

Avogadro's number: 6.022×10²³ atoms/mol

Molar Mass: 107.87 g/mol

Now that we have everything we need, we can convert atoms to grams.

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3 0
3 years ago
What does the model represent
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The model represents Photosynthesis. Light, carbon dioxide, and water are the reactants. The products will be Sugar and Oxygen. Photosynthesis releases oxygen and glucose. Which is the energy that living things need to survive.
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