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Chemistry

1 answer:

earnstyle [38]3 years ago

4 0

Answer:

I think the answer to this question is chemical reactions

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Explain why you think learning about the rock cycle will help us better understand the world around us.

Karolina [17]

Answer:

You can learn about common things happening to the environment that aren't good. Such as erosion, and the effects it has on the land surrounding it.

Explanation:

3 0

3 years ago

When acid (X) reacts with base (Y) to produce Mg3(PO4)2- what are X and Y

kow [346]

Mg3(PO4)2 - Mg²⁺ forms base

PO4³⁻ forms acid

Ma(OH)2 is a base(Y).

H3PO4 is an acid(X).

3Mg(OH)2 + 2H3PO4 ---> Mg3(PO4)2 + 3H2O

7 0

4 years ago

(a) a 0.2 m potassium hydroxide solution is titrated with a 0.1 m nitric acid solution. (i) balanced equation: (ii)what would be

Stells [14]

$\text{KOH} (aq) + \text{HNO}_3 (aq) \to \text{KNO}_3 (aq) + \text{H}_2\text{O} (l)$

The solution shall contain only $\text{KNO}_3 (aq)$ (and water) at the equivalence point. Both potassium hydroxide and nitric acid exist as strong electrolytes. As a result, $\text{KNO}_3 (aq)$ , the salt derived from a reaction between the two species would undergo hydrolysis of a negligible extent. This neutralization reaction therefore be neutral at the equilibrium point.

The question states that the solution is "titrated with a ... nitric acid solution" indicating that $\text{HNO}_3$ is added to the initially-basic solution. PH value of the solution would keep decreasing as the volume of the acid added increases. The final solution would be acidic as it contains not only water and $\text{KNO}_3 (aq)$ , but some $\text{HNO}_3$ as well. Bromothymol blue would therefore demonstrates a yellow color, the color it present in an acidic solution, at the end of the titration.

5 0

3 years ago

what is the anode material used in the extraction of aluminium by electrolysis and why it needs to be changed at interval

pishuonlain [190]

Answer:

the anode material is graphite(replaceable graphite rods).

The oxygen gas burns away the anode as Carbon dioxide therefore the anode must be replaced continuously.

3 0

3 years ago

A sample of gas A has a molar mass of 4 grams while a sample of gas B has a molar mass of 16 grams. Which statement holds true?

jeka94

I believe the closest possible answer to this question are:Gas A effuses faster than gas B.The molar mass is directly proportional to the rate of effusion.Thank you for your question. Please don't hesitate to ask in Brainly your queries

4 0

4 years ago

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