All categories

3 years ago

(6, -3) is an example of a _____.

Chemistry

1 answer:

amid [387]3 years ago

8 0

Answer:

it is not clear

but I think you are mean a oxidation state for element or compound ( molecule )

like -4 in [Cr(CO)4]4−

You might be interested in

Deceive the photoelectric effect and explain why it made modifications to the Rutherford model necessary

Anna [14]

Nooooooooooooooooooo

5 0

3 years ago

H2SO4 Found in car batteries. Element Name Number of Atoms

jek_recluse [69]

Answer:

Sulfuric Acid (H₂SO₄) is a compound made from the elements: sulfur, oxygen and hydrogen. One molecule of sulfuric acid is made up of the following atoms:

Hydrogen (H) = 2

Sulfur (S) = 1

Oxygen (O) = 4

Total Atoms = 7

~Hope this helps!~

7 0

3 years ago

Which particles make up to the nucleus of an atmon?

vazorg [7]

The nucleus of an atom is made up of protons and neutrons (two types of baryons) joined by the nuclear force.

5 0

4 years ago

A chemist measures the energy change

Flauer [41]

Answer:

For (1): The correct option is (a)

For (2): The correct option is (a) and 333.6 kJ of heat will be absorbed when 70.9 g of ammonia reacts.

Explanation:

There are 2 types of reactions that are classified based on enthalpy change:

Endothermic reactions: These are the reactions where heat is absorbed by the reaction. The change in enthalpy of the reaction, $\Delta H_{rxn}$ is positive for these reactions.

Exothermic reactions: These are the reactions where heat is released by the reaction. The change in enthalpy of the reaction, $\Delta H_{rxn}$ is negative for these reactions.

For (1):

For the given chemical reaction:

$2NH_3(g)\rightarrow N_2(g)+3H_2(g);Delta H=160kJ$

As the change in enthalpy or heat of the reaction is positive. Thus, the reaction is an endothermic reaction because heat is absorbed by the reaction.

For (2):

When ammonia reacts, some amount of heat will be absorbed by the reaction. Thus, we can say the heat will be absorbed.

The number of moles is calculated by using the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of ammonia = 70.9 g

Molar mass of ammonia = 17 g/mol

Using equation 1:

$\text{Moles of ammonia}=\frac{70.9g}{17g/mol}=4.17mol$

By stoichiometry of the reaction:

If 2 mole of ammonia reacts, the heat absorbed is 160 kJ

So, if 4.17 moles of ammonia reacts, the heat absorbed will be = $\frac{160kJ}{2mol}\times 4.17mol=333.6kJ$

Hence, 333.6 kJ of heat will be absorbed when 70.9 g of ammonia reacts

8 0

3 years ago

(3 x 104) (4 x 1023) = _____

Law Incorporation [45]

Three things. 1. The answer is 1,276,704 2. Please make sure you show work. Plagiarism-free person. 3. This is a math question. Not a chemistry question.

6 0

3 years ago