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Vika [28.1K]
4 years ago
14

Does a change of phase produce a new substance? Explain. Please help me on this ❤

Chemistry
1 answer:
Brums [2.3K]4 years ago
3 0
Liquid, solid, and gas are all different substances
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In a lab about the activity series, a solution of copper(II)chloride is placed in a test tube with zinc metal. If zinc is higher
Rus_ich [418]

Answer:

A simple displacement reaction is carried out.

Explanation:

Hello,

The statement suggest the following chemical reaction, that is carried out under the conditions it is describing:

CuCl_2(aq)+Zn(s) --> ZnCl_2(aq)+Cu(s)

Now, the bits of copper are formed due the cation displacement that is carried out when Cu(II) cations are exchanged by Zn(II) cations by cause of the chemical reaction, so the Cu stops acting as a cation and comes back to its metallic form.

Best regards.

3 0
4 years ago
Why metals are good conductor of electricity​
HACTEHA [7]

Explanation:

silver is the best conductor

3 0
3 years ago
Read 2 more answers
1. I am in group two period three. What element am I?<br> A Ti<br> B, C<br> C. Ca<br> D. WE
AysviL [449]

Answer:

Ca

Explanation:

5 0
3 years ago
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A 25 gram(m) metal ball is heated to 200C(delta T) with 2330 Joules(q) of energy. What is the specific heat of the metal?
Dominik [7]

Answer:

The specific heat of the metal is 0.466 \frac{J}{g*C}

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

The equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case:

  • Q= 2330 J
  • c= ?
  • m= 25 g
  • ΔT= 200 °C

Replacing:

2330 J= c*25 g* 200 °C

Solving:

c=\frac{2330 J}{25 g* 200 C}

c=0.466 \frac{J}{g*C}

<u><em>The specific heat of the metal is 0.466 </em></u>\frac{J}{g*C}<u><em></em></u>

6 0
4 years ago
Read 2 more answers
Please help need it by 11 tonight!: Express your answer using two significant figures.
Blizzard [7]

Answer:

A. 0.064mol

B. 0.85mol

C. 1500mL

Explanation:

A. Molarity = 0.33M

Volume = 195mL = 195/1000 = 0.195L

Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 0.33 x 0.195

Mole = 0.064mol

B. Molarity = 1.7M

Volume = 500mL = 500/1000 = 0.5L

Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 1.7 x 0.5

Mole = 0.85mol

C. C1 = 12M

V1 = 50mL

C2 = 0.4M

V2 =?

Using the dilution formula C1V1 = C2V2, we find the volume of the diluted solution as follows:

C1V1 = C2V2

12 x 50 = 0.4 x V2

Divide both side by 0.4

V2 = (12 x 50) /0.4

V2 = 1500mL

3 0
3 years ago
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