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Maksim231197 [3]
3 years ago
9

A.Which non-metal is essential for our life and all living beings inhale it during breathing?

Chemistry
2 answers:
vodomira [7]3 years ago
6 0

Answer:

A. oxygen

B. chlorine

2. iodine

(a) because aluminium is a soft malleable metal. it can be made to in sheets to form thin wrapping sheets. also, it does not react with food items.

(b) because metals are good conductors of heat and electricity. the immersion rod needs electric supply to get heated and to heat liquids.

(c)  they're kept in kerosene to keep them from coming in contact with oxygen and moisture as they react to form their hydroxides.

4. Magnesium is a metal. Metals react with oxygen to form metallic oxides. So Magnesium oxides are basic in nature. But nonmetals react with oxygen to form nonmetallic oxides. These oxides differ from metallic oxides because they are acidic in nature. Nonmetallic oxides react with water to form acids. Therefore, Sulphur dioxide is acidic in nature. Magnesium oxide is basic in nature.

5. Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper carbonate and copper hydroxide. It's acidic in nature.

Mandarinka [93]3 years ago
5 0

Answer:

2.A

Explanation:

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Examine MSDS for hydrogen peroxide 3% and hydrogen peroxide 30% from the same manufacturer. Compare the information contained in
Natasha2012 [34]

Answer:

sample response:

The chemical is the same but the concentration is different.

The chemical is more dangerous in its highly concentrated form.

Although the chemicals are the same, they require different handling procedures. Therefore specific information should be available for each.

Explanation:

:) Edge 2020

4 0
3 years ago
How many moles of KCIO3 most decompose to form 13.0 moles of potassium chloride?
Elden [556K]

Answer:

13 moles of KClO₃ will decompose to gives 13 moles of KCl.

Explanation:

Given data:

Moles of potassium chloride = 13.0 mol

Moles of KClO₃ = ?

Solution:

Chemical equation:

2KClO₃ → 2KCl + 3O₂

Now we will compare the moles of KCl  with KClO₃.

                     KCl         :           KClO₃

                      2            :             2

                      13           :            13

So 13 moles of KClO₃ will decompose to gives 13 moles of KCl.

6 0
4 years ago
Why is a match being struck a physical change
JulsSmile [24]
Cuz the match can burn and turn in to ash so when it burn and turn in to ash you can't do nothing with the ash hop that make since
3 0
4 years ago
Question 2 The metal molybdenum becomes superconducting at temperatures below 0.90K. Calculate the temperature at which molybden
LenKa [72]

Answer:

Temperature at which molybdenum becomes superconducting is-272.25°C

Explanation:

Conductor are those hard substances which allows path of electric current through them. And super conductors are those hard substances which have resistance against the flow of electric current through them.

As given, molybdenum becomes superconducting at temperatures below 0.90 K.

Temperature in Kelvins can be converted in °C by relation:

T(°C)=273.15-T(K)

Molybdenum becomes superconducting in degrees Celsius.

T(°C)=273.15-0.90= -272.25 °C

Temperature at which molybdenum becomes superconducting is -272.25 °C

5 0
4 years ago
Which products are the result of a neutralization reaction? (1 point)
Nata [24]

Answer:

B) water and salt is the result of neutralization reaction

3 0
3 years ago
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