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Lilit [14]
3 years ago
8

Two chemical reactions are shown. Which statements is true?

Chemistry
1 answer:
Marizza181 [45]3 years ago
7 0

Answer:

The answer is b

Explanation:

they both are decomposition

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A mole is a name for a specific number of things. What is the value of a mole? write the number using scientific notation. By wh
vesna_86 [32]

The value of a mole is 6.022 ×10^{23}. The other name of mole is Avogadro's number.

The mole is define as  6.022 ×10^{23} of the chemical unit like atoms , molecules, ions or others.It is very convenient unit because of huge numbers o f atoms, molecules or others. This is very important unit used by chemist.

One mole = atomic Mass of atoms / molecular mass of molecule

Example: one mole of sodium = 23 g = atomic mass

Learn about chemical unit

brainly.com/question/10997426

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7 0
1 year ago
What the approximate mass of 24cm of silver, if the density is 10.5 g/cm
Alona [7]
Use equation density = mass/volume
Known/Given

d= 10.5g/cm^3
v= 24.0 cm^3

Use that equation i just mentioned...
Solution
Rewrite the formula as the forumla for solving density into mass

Which is... mass = 10.5g/cm^3 × 24.0cm^3 = 252g

So thats the answer
252g

Hope i could help
8 0
3 years ago
Manganese forms several oxides when combined with oxygen. One of the oxides (Oxide 1) contains 63.2% of Mn and another oxide (Ox
Nina [5.8K]

Explanation:

Defining law of definite proportions, it states that when two elements form more than one compound, the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.

A. One of the oxides (Oxide 1) contains 63.2% of Mn.

Mass of the oxide = 100g

Mass of Mn = 63.2 g

Mass of O = 100 - 63.2

= 36.8 g

Ratio of Mn to O = 63.2/36.8

= 1.72

Another oxide (Oxide 2) contains 77.5% Mn.

Mass of oxide = 100 g

Mass of Mn = 77.5 g

Mass of O = 100 - 77.5

= 22.5 g

Ratio of Mn to O = 77.5/22.5

= 3.44

Therefore, the ratio of the masses of Mn and O in Oxide 1 and Oxide 2 is in the ratio 1.72 : 3.44, which is also 1 : 2. So the law of multiple proportions is obeyed.

B.

Oxide 1

Mass of Mn per 1 g of O = mass of Mn/mass of O

= 77.5/22.5

= 3.44 g/g of Oxygen.

Oxide 2

Mass of Mn per 1 g of O = mass of Mn/mass of O

= 77.5/22.5

= 3.44 g/g of Oxygen.

3 0
3 years ago
Which of the following represents a chemical change?
Snezhnost [94]
The answer is B.) Freezing of water
3 0
3 years ago
PLEASE HELPPPP!!! IM BEING TIMED
Mrac [35]

Answer:

B)

Explanation:

This should be the correct answer, lmk if it's not

8 0
2 years ago
Read 2 more answers
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