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ANEK [815]
3 years ago
14

What is atomwhat is atom​

Chemistry
2 answers:
Anna11 [10]3 years ago
7 0
An atom is a chemical that you cannot see but helps you live and breathe
Elanso [62]3 years ago
6 0

Answer:

<em>An</em><em> </em><em>atom</em><em> </em><em>is</em><em> </em><em>a</em><em> </em><em>chemical </em><em>substance </em><em>which</em><em> </em><em>exist </em><em>freely </em><em>in</em><em> </em><em>natu</em><em>re</em><em> </em><em>without </em><em>any</em><em> </em><em>reaction </em><em>.</em>

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What mass of hydrogen will be produced by the reaction of 67.3 g of tin with excess water according to the following reaction?
Crank

Answer:

Mass of hydrogen produced =2.28 g

Explanation:

Given data:

Mass of tin = 67.3 g

Mass of hydrogen produced = ?

Solution:

Chemical equation:

Sn + 2H₂O    → SnO₂+ 2H₂

Number of moles of Sn:

Number of moles = mass/ molar mass

Number of moles = 67.3 g/ 118.71 g/mol

Number of moles = 0.57 mol

Now we will compare the moles of tin with hydrogen from balance chemical equation.

                             Sn             :               H₂

                              1               :                2

                          0.57             :               2×0.57 = 1.14

Mass of hydrogen:

Mass = number of moles ×molar mass

Mass = 1.14 mol × 2 g/mol

Mass = 2.28 g

6 0
3 years ago
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