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3241004551 [841]
3 years ago
11

Need help with chemistry questions

Chemistry
1 answer:
Misha Larkins [42]3 years ago
6 0

Answer:

1. 1.34g

2. 1.19g

3. 0.49g

Explanation:Please see attachment for explanation

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vivado [14]

Answer:

Your hypothesis is an educated guess of what the end results of an experiment will be, using what you already know about your experiment you are going to conduct. So when you receive your final results, if your hypothesis is correct, or even somewhat correct then you know that it is supported by your results. For example, if I were to conduct the Coca-Cola and Mentos experiment, I could make a hypothesis that the Coca-Cola will have a bigger eruption when I add more than one Mento to the bottle due to a higher amount of a chemical with the addition of each mento. When I receive my results that the eruption was bigger each time, I know that my results supported my hypothesis.

Explanation:

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Flauer [41]

A- Eat more beans

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3 years ago
What are the spectator ions in this equation?
dangina [55]

The given question is incomplete. The complete question is :

What is the net ionic equation for the following reaction?

H_2CrO_4+Ba(OH)_2

Answer : The spectator ions are Ba^{2+} and CrO_4^{2-}

Explanation:

Neutralization is a chemical reaction in which an acid and a base reacts to form salt and water.

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

2H^+(aq)+CrO_4^{2-}(aq)+Ba^{2+}(aq)+2OH^-(aq)\rightarrow Ba^{2+}(aq)++CrO_4^{2-}(aq)+H_2O(l)

The ions which are present on both the sides of the equation are barium and chromate ions. and hence are not involved in net ionic equation.

Hence, the net ionic equation is H^++OH^-\rightarrow H_2O

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JJ Thomson discovered electrons using the cathode ray. Electrons are negatively charged particles that orbit around the nucleus of an atom. Finding out that there was a negative charge to balance out the positive charge. This later helped develop Hund's Rule and the Pauli Exclusion Principle.
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