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Pachacha [2.7K]
3 years ago
5

Water is separated into hydrogen and oxygen gas by electrolysis.

Chemistry
1 answer:
sleet_krkn [62]3 years ago
6 0

Answer:

water is separated into hydrogen and oxygen gas by electrolysis is

Explanation:

both physical change and chemical change:

1) physical properties and form gets changed

2) Chemical change as the entire composition also gets changed

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2. Which of the following is a mixture?
Ganezh [65]

Hey there!

Your answer is D. salt water  

A mixture has more than one substance.

Salt water is made up of multiple different substances, salt (NaCl) and water (H₂O).

Carbon dioxide (CO₂), water vapor (H₂O), and oxygen gas (O₂) are each just one substance.

Hope this helps!

7 0
3 years ago
Which group on the periodic table already stable?
viktelen [127]
The noble gases AKA the column with full outermost valence shells. (Group 18)
7 0
3 years ago
Read 2 more answers
Heat is which of the following???
Sergeu [11.5K]
A measure of thermal energy transferred between two different bodies at different temperatures would be the correct answer. So, the third option.
5 0
3 years ago
A chemist measures the energy change ?H during the following reaction:
Leno4ka [110]

Answer:

(A) endothermic

(A) Yes, absorbed

Explanation:

Let's consider the following thermochemical equation.

2 Fe₂O₃(s) ⇒ 4 FeO(s) + O₂(g)  ΔH = 560 kJ

Since ΔH > 0, the reaction is endothermic.

We can establish the following relations:

  • 560 kJ are absorbed when 2 moles of Fe₂O₃ react.
  • The molar mass of Fe₂O₃ is 160 g/mol.

Suppose 66.6 g of Fe₂O₃ react. The heat absorbed is:

66.6g.\frac{1mol}{160g} .\frac{560kJ}{2mol} =117kJ

5 0
3 years ago
What is a neutralisation reaction? Give two examples.
ozzi

Explanation:

A neutralization is a type of double replacement reaction. a salt is the product of an acid-base reaction and is a much broader term then common table salt.

Example:-

(i) HCl + NaOH ---> NaCl + HOH

(ii) H2SO4 + 2NH4OH ---> (NH4)2SO4 + 2HOH.

7 0
3 years ago
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