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2 years ago

What ive learned about heat,sound and light

Chemistry

1 answer:

steposvetlana [31]2 years ago

8 0

Answer:

they are all in parts of our life and we need them each for surviving.

Explanation:

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7. (04wP2-5)Elements with atomic number 21 to 30 are d-block elements.

Katyanochek1 [597]

Answer :

(a) zn

Explanation:

(b) a ligand is an ion or molecule that binds to the central metal atom to form a cordinate complex.
(c)

<h3> above</h3>

3 0

2 years ago

Classify each of the following as energy primarily transferred as HEAT or energy primarily transferred as WORK.

IgorLugansk [536]

number 1 is work number 2 is heat

6 0

3 years ago

A solution is made by dissolving

nikklg [1K]

Answer:

THE MOLARITY IS 2.22 MOL/DM3

Explanation:

The solution formed was as a result of dissolving 37.5 g of Na2S in 217 g of water

Relative molecular mass of Na2S = ( 23* 2 + 32) = 78 g/mol

Molarity in g/dm3 is the amount of the substance dissolved in 1000 g or 1 L of the solvent. So we have;

37.5 g of Na2S = 217 g of water

( 37.5 * 1000 / 217 ) g = 1000 g of water

So, 172.81 g/dm3 of the solution

So therefore, molarity in mol/dm3 = mol in g/dm3 / molar mass

Molarity = 172.81 g/dm3 / 78 g/mol

Molarity = 2.22 mol/dm3

The molarity of the solution is 2.22 mol/dm3

4 0

3 years ago

What would the products of a double-replacement reaction between KBr and CaO be? (Remember: In double-replacement reactions, the

11111nata11111 [884]

ANSWER

$\begin{gathered} \text{ 2KBr }+\text{ CaO }\rightarrow\text{ K}_2O\text{ }+\text{ CaBr}_2 \\ Option\text{ B} \end{gathered}$

EXPLANATION

Given that;

The two reactants are KBr and CaO

Double replacement reaction is a type of chemical reaction that occur when two reactants exchange cations and anions to yield new products.

$\text{ 2KBr + CaO }\rightarrow\text{ K}_2O\text{ + CaBr}_2$

Therefore, the resulting products of the given data are K2O + CaBr2

The correct answer is option B

4 0

1 year ago

What is the name of the state when electrons absorb energy and move to a higher energy level?

Sergeu [11.5K]

Answer:

Excited State

Explanation:

It's when electrons absorb energy and move to a higher level.

4 0

2 years ago

Read 2 more answers

What ive learned about heat,sound and light​

What ive learned about heat,sound and light