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SVETLANKA909090 [29]
2 years ago
5

See pic pls dont take a long time pls

Chemistry
2 answers:
REY [17]2 years ago
6 0
Drifte cook is right
IgorLugansk [536]2 years ago
3 0
Answer
The group of students is incorrect. Boiling water is NOT a chemical change. The group incorrectly identified it as a chemical change because the water changed to steam and bubbles.

Boiling water is a physical change to steam and bubbles but it is still water. The steam puts itself into the air as evaporation. The opposite of evaporation is condensation, when water vapor condenses back into tiny droplets of water.

A chemical change is when something changes and becomes a new substance or property, like burning wood.

A physical change is when the appearance or form of the substance changes but the kind of substance doesn’t, just like the boiling water.
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write a skeletal equation for the following reaction: An aqueous solution of barium nitrate and an aqueous solution of sodium su
belka [17]

Answer: skeletal equation : Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow NaNO_3(aq)+BaSO_4(s)

The products are sodium nitrate and barium sulphate.

balanced equation :  Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow 2NaNO_3(aq)+BaSO_4(s)

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

The skeletal equation is:

Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow NaNO_3(aq)+BaSO_4(s)

The balanced chemical equation is:

Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow 2NaNO_3(aq)+BaSO_4(s)

7 0
3 years ago
What volume would 8.01×1022 molecules of an ideal gas occupy at STP?
Nataly_w [17]

Explanation:

8.01 \times  {10}^{22}  \times  \frac{1}{6.02 \times  {10}^{23} }  \times  \frac{22.4}{1}  = 2.9804

5 0
3 years ago
1. A gas has a pressure of 799.0 mm Hg at 50.0 degrees C. What is the temperature at standard Pressure?
larisa [96]

Answer:

A = 674.33mmHg

B = 0.385atm

Explanation:

Both question A and B requires the application of pressure law which states that the pressure of a fixed mass of gas is directly proportional to its temperature provided that volume is kept constant.

Mathematically,

P = kT, k = P / T

P1 / T1 = P2 / T2 = P3 / T3 =.......= Pn/Tn

A)

Data:

P1 = 799mmHg

T1 = 50°C = (50 + 273.15) = 323.15K

P2 = ?

T2 = 273.15K

P1 / T1 = P2 / T2

Solve for P2

P2 = (P1 × T2) / T1

P2 = (799 × 273.15) / 323.15

P2 = 674.37mmHg

The final pressure is 674.37mmHg

B)

P1 = 0.470atm

T1 = 60°C = (60 + 273.15)K = 333.15K

P2 = ?

T2 = 273.15K

P1 / T1 = P2 / T2

Solve for P2,

P2 = (P1 × T2) / T1

P2 = (0.470 × 273.15) / 333.15

P2 = 0.385atm

The final pressure is 0.385atm

7 0
3 years ago
Read 2 more answers
Hey can anyone help me please?​
Bingel [31]

Answer:

D

Explanation:

D is the answer

4 0
4 years ago
Read 2 more answers
Can anyone please tell me the answer?​
cricket20 [7]

Answer:

1=4

2=2

3=hydrogen bonding

4=SO2 is reduced to Sulphur

Explanation:

<h2>I am trying my best okay.</h2>
8 0
3 years ago
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