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2 years ago

Which compound will give positive Tollen's test?

1 answer:

5 0

Tollen's test is an organic test that determines whether the sample is an adehyde or not. When aldehydes are present, the reaction forms a silver compound which refers to the other name of Tollen's as silver mirror test. The aldehyde among the choices is C. pentanal

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Which of the following is a characteristic of all chemical changes?A. A different state of matter is produced. B. Some mass is c

blagie [28]

Letter A is the characteristic of all chemical change

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2 years ago

Every day, each person in Canada throws out about 2.2 kg of garbage. If the population of Canada is 31 900 000, the total mass o

krok68 [10]

Answer:

70 180 000 kg

Explanation:

We can solve this problem by multiplying the amount of garbage each Canadian throws out each day (2.2 kg) by the number of Canadians:

2.2 kg/person * 31 900 000 persons = 70 180 000

Thus according to this problem, all Canadians throw out 70 180 000 kg of garbage each day.

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3 years ago

If you have 3.8 grams of NaCl, how many moles of NaCl do you have?

Andre45 [30]

You will have 0.06502087426717999 moles of NaCl with 3.8 grams. 1 gram= 0.0171107563861

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2 years ago

Help!!!!!!<br> I'm using plato

Masja [62]

Answer:

Freezing

Melting

Condensation

Evaporation

Sublimation

Deposition

Explanation:

From the diagram,

(1) Liquid⇒Solid (Freezing)

Freezing: This is the process by through which a substance change from liquid to solid.

(2) Solid⇒Liquid (Melting)

Melting: This is a process through which a substance change from solid to liquid

(3) Liquid⇒gas (Evaporation)

Evaporation: This is a process through which a substance change from liquid to gas.

(4) gas⇒Liquid (Condensation)

Condensation: This is a process through which a substance change from gas to liquid

(5) Solid⇒gas (Sublimation)

Sublimation: this is a process through which a subtance change from solid to gas

(6) gas⇒solid (Deposition)

Deposition: This is a process through which gas transform into solid.

6 0

3 years ago

Consider the following system at equilibrium. CaCO3(s) Double headed arrow. Ca2 (aq) CO32â€""(aq) The addition of which compound

Dominik [7]

The compound that has been capable to shift the equilibrium with common ion effect has been $\rm \bold{Na_2CO_3}$ . Thus, option D is correct.

The complete equation for the decomposition of calcium carbonate has been:

$\rm CaCO_3\rightleftharpoons Ca^2^+\;+\;CO_3^2^-$

The equilibrium has been the state in the reaction, when the number of products and has been equivalent to the number of reactants. The increase or decrease in the concentration of any of the reactant or product results in the shift in the equilibrium.

For the given reaction, the addition of Calcium or carbonate ions to the solution results in the increase in the product concentration with the common ion effect, and thereby shifts the equilibrium condition.

The ions liberated by the following compounds has been:

$\rm CCl_4\;=\text{not dissolved}\\CO_2\;+\;H_2O\leftrightharpoons CO_3^-\;+\;H^+\\CuSO_4\leftrightharpoons Cu^2^+\;+\;SO_4^2^-\\Na_2CO_3\leftrightharpoons 2\;Na^+\;+\;CO_3^-$

The compound, that has been capable of liberating the carbonate ions in the medium has been $\rm \bold{Na_2CO_3}$ . Thus, it results in the shift of the equilibrium due to common ion effect. Hence, option D is correct.

For more information about common ion effect, refer to the link:

brainly.com/question/4090548

6 0

2 years ago