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Semmy [17]
3 years ago
15

The boiling point is the temperature at which (2 points) Select one: a. A solid becomes a liquid b. A liquid becomes a gas c. A

gas becomes a solid d. A solid becomes a gas
Chemistry
1 answer:
Anit [1.1K]3 years ago
7 0
The answer is B..............
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How many milliliters of concentrated hydrochloric acid solution (36.0% HCl by mass, density = 1.18 g/mL) are required to produce
poizon [28]
W=0.360
p=1.18g/mL
pH=2.12
v=14.0 L
M(HCl)=36.46 g/mol
v₀-?

1) pH=-lg[H⁺]

    [H⁺]=c(HCl)=10^(-pH)

    n(HCl)=v[H⁺]=v*10^(-pH)

2) n(HCl)=m(HCl)/M(HCl)=wv₀p/M(HCl)

3) v*10^(-pH)=wv₀p/M(HCl)

    v₀=v*10^(-pH)M(HCl)/(wp)
  
    v₀=14.0*10^(2.12)*36.46/(0.360*1.18)=9.115 mL


Approximately 9.1 mL of concentrated solution required.




3 0
4 years ago
4. Assuming the reaction below is at equilibrium, which of the following changes will drive the reaction to the left? C(s) + O2(
shepuryov [24]

Answer:

Increasing temperature

Explanation:

C(s) + O_2(g) \leftrightharpoons CO_2(g)

Enthalpy of the reaction = -393.5 kJ/mol

Negative sign implies that reaction is exothermic.

Effect of change in reaction condition is explained by Le chateliers principle.

According to Le chateliers principle, if the reaction conditions of a reversible reaction in a state of dynamic equilibirum is changed, the reaction will move in a direction to counteract the change.

1. Increasing the temperature

Forward reaction is exothermic that means temperature increases in forward direction. Backward reaction will be endothermic and so there is decrease in temperature in backward direction or in left direction.

On increasing temperature, reaction will be move in direction to counteract the increased temperature, therefore reaction will move in left direction.

2. Adding O2

If O2 is added, then reaction will move in a direction in which its get consumed. So, reaction will move in forward direction or in right direction.

3. Removing C (s)

Le Chatelier's principle does not apply on solids, so removal of C(s) does not affect the equilibrium.

4 0
4 years ago
Read 2 more answers
Choose the statement that best describes the titration from which this data was collected
kherson [118]
I think the correct answer is the first option. The analyte was an acid but and the titrant is a base since from the graph the initial pH of the solution is at an acidic pH when  there is still no titrant added.
4 0
3 years ago
How many neutrons are in a typical silicon atom?<br> A. 15<br> B. 14<br> C. 28<br> D. 42
Aleksandr [31]
Silicon (Si) atomic mass is 28.085.
To find the mass number of most common isotope we need to round atomic mas to wholes.
28.085≈28 is atomic mass
Atomic number(number of protons) is an ordinal number of an element in the Periodic Table.
 For silicons it is 14.
Mass number=number of protons(atomic number)+number of neutrons.
Number of neutrons=Mass number - Number of Protons(atomic number)
Number of neutrons= 28 - 14 = 14

Correct answer is B.14

7 0
3 years ago
What happens when you break earphones into smaller pieces
Vadim26 [7]

Answer:

Well its not gonna work anymore and you will be able to all the wires in the earphones!

Explanation:

6 0
4 years ago
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