Match the following definition to the type of solution it describes. unsaturated solution
saturated solution
supersaturated solution

A.
The amount of solute dissolved is less that the maximum amount the solution can hold.
B.
The amount of solute dissolved is the maximum amount the solution can hold.
C.
The amount of solute dissolved is more than the usual maximum amount.

Answers

Answer 1

Answer:

The following definition to the type of solution it describes are

unsaturated solution: A. The amount of solute dissolved is less that the maximum amount the solution can hold.
saturated solution: B. The amount of solute dissolved is the maximum amount the solution can hold.

supersaturated solution: C. The amount of solute dissolved is more than the usual maximum amount.

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Which of the following statements is true? a. Ag(s) reacts spontaneously with 1 M H+(aq). b. Ag(s) reacts spontaneously with Ni2+. c. Ag(s) reacts spontaneously with 1 M NO3– in 1 M H+(aq). d. Ni2+ reacts spontaneously with 1 M H+(aq) to form H2. e. Ni2+ reacts spontaneously with H2(g).

Answers

Answer:

Correct answer is a. Ag(s) reacts spontaneously with 1M H+(aq).

Explanation:

A charasteristic of metals is that they lose easily electrons, cations tends to gain electrons to react and anions tends to lose or share electrons to react.

If you want to make a chemical reaction you must to mix a reagent that tends to lose electrons with other that tends to gain them.

In the statement (a) we have a metal that loses electrons and a cation that can obtain them, so is the right answer.

note that the other optios have :

b) Metal with metal cation, not react beacause left a medium of reaction.

c) Both loses electrons

d) Both tends to gain electrons.

If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over?Unbalanced equation: Ca + HCl → CaCl2 + H2

Answers

Answer:

2.53 grams of hydrogen gas will be produced and 12.2 many grams of the excess reactant i.e. calcium will be left over.

Explanation:

$Ca + 2HCl\rightarrow CaCl_2 + H_2$

Moles of calcium = $(62.8 g)/(40 g/mol)=1.57 mol$

Moles of HCl = $(92.3 g)/(36.5 g/mol)=2.53 mol$

According to reaction, 2 moles of HCl reacts with 1 mole of calcium :

Then 2.53 moles of HCl will recat with :

$(1)/(2)* 2.53 mol= 1.265 mol$ of calcium.

As we can see moles of calcium are in excessive amount. Hence calcium is an excessive reagent.

Moles of calcium left unreacted =1.57 mol - 1.265 mol =0.305 mol

Mass calcium left unreacted = 0.305 mol × 40 g/mol =12.2 g

Since, calcium is an excessive reagent HCl is limiting reagent and the amount of hydrogen gas produced will depend on HCl .

According to reaction, 2 moles of HCl gives 1 mole of hydrogen gas.

Then 2.53 moles of HCl will give:

$(1)/(2)* 2.53 mol= 1.265 mol$ of hydrogen gas.

Mass of 1.265 mol of hydrogen gas = 1.265 mol × 2 g/mol = 2.53 g

2.53 grams of hydrogen gas will be produced and 12.2 many grams of the excess reactant i.e. calcium will be left over.

Answer:

2.55 g of hydrogen

12.17 g calcium.

to nearest hundredth.

Explanation:

The balanced equation is:

Ca + 2HCl ---> CaCl2 + H2

Using the atomic masses

40.078 g Ca react with 72.916 g of HCl to give 2.016 g HCl

The ratio of Ca to HCl in the above is 1 to 1.81935

so 62.8 g Ca reacts with 62.8 * 1.81935 = 114.245 g HCl

so there is excess of Ca in the given weights.

Therefore the mass of Hydrogen produced

= (2.016 / 72.916) * 92.3

= 2.552 g of hydrogen gas.

The mass of calcium required to produce 2.552 g of hydrogen is:

(2.552 / 2.016) * 40.078

= 50.73 g

So the excess of calcium is 62.8 - 50.73

= 12.17 g.

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b. 4
c. 8
d. 10
e. 13

Answers

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Answers

The one on the left is an animal cell and the one on the right is a plant cell, the answer is chloroplast

Answer:

A.) Chloroplast

Explanation:

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