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3 years ago

Can you help me with this question

Chemistry

1 answer:

Digiron [165]3 years ago

3 0

Answer:

lithium is the most reactive alkali metal false as the reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal.

covalent bond is formed due to mutual sharing of electrons true

potassium is most reactive matal in activity series of metals false no lithium is more reactive than potassium

the process in which heat is given on surrounding is exothermic reaction not endothermic reaction

alkyl molecule is formed by removal of one hydrogen atom from alkane molecule true

Explanation:

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4 years ago

What is units we used for measuring the radon gas?

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Answer:

Bq/m3 (becquerels per cubic meter) or pCi/l (picocuries per litre)

Explanation:

The unit of the International System of Units identified to measure radioactive activity is Becquerelio (Bq) and equivalent to one decay per second.

The Curio (Ci) is also a radioactivity unit, which is still being used in some countries. It owes its name to chemists and chemists Pierre and Marie Curie.

It represents the amount of material in which 3.7 × 1010 atoms per second, or 3.7 × 1010 nuclear decays per second, which is roughly the activity of 1 g of 226Ra (isotope of the chemical chemical element).

The equivalence between the two is:

1Ci= 3,7 × 1010Bq

The specific radioactive activity of a radioactive gas such as radon gas is measured per unit volume and measured in Bq/m3 or pCi/l.

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4 years ago

In a chemical equation, which symbol should be used to indicate that a substance is in solution?

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Example :

$2FeCl_3_{(aq)}+2KI_{(aq)}=2FeCl2_{(aq)}+2KCl_{(aq)}+I_2_{(s)}$

If you use the subscript (aq) (=aquaris) , this means that the substance is in a solution.

Subscripts:
-aq-this means that the substance is in a solution
-s-this means that the substance is a solid(or precipitate)
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3 years ago

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Can you help me with this question ​

Can you help me with this question