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Yanka [14]
3 years ago
8

What would indicate that a physical change takes place when copper is drawn into wire

Chemistry
2 answers:
dedylja [7]3 years ago
5 0
The shape of the copper would change. 
kykrilka [37]3 years ago
5 0

Explanation:

A physical change is defined as a change that does not bring any difference in chemical composition of a substance.

For example, shape, size, mass, volume, density, etc of a substance are all physical properties.

So, when copper is drawn into wire then there will occur change in its shape but there will not be any change in its chemical composition.

Whereas when a change in chemical composition of a substance occurs then it is known as a chemical change.

Hence, we can conclude that change in the shape of copper when it is drawn into wire indicates a physical change.

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To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to
uranmaximum [27]

Answer: 63.88 atm

Explanation:

To answer this, we use the formula PV = nRT since the asumption is that the gas has an ideal behavior

where number of mole = 2.60 mol, R(gas constant) = 0.08205746 L atm/K mol,

T = 251 ∘C = (251 + 273) K = 524 K, Volume = 1.75 L

Making Pressure the subject of the formula, we have

P = nRT/V = 2.6 * 0.08205746 * 524/2.75 = 63.88 atm

6 0
3 years ago
For each of the salts on the left, match the salts on the right that can be compared directly, using Ksp values, to estimate sol
diamong [38]

Answer: ksp= 4s³

Explanation:

4 0
3 years ago
What conclusions can you draw about the factors that affect the rate of solution formation?
konstantin123 [22]

The factors that affect the rate of solution formation are capable of either increasing the rate of solution formation or decreasing it.

<h3>Factors that affect the rate of solution formation</h3>

The rate of solution formation from a chemical reaction depends on the following factors:

  • Quantity of solute and solvent: The solute should be in less quantity and solvent should be more in quantity to dissolve the solute. This will enhance the formation of solution

  • The size of the solute particles: When the solute particles are in smaller sizes, they react faster with the solvent to form solutions.

  • The temperature of solvent: In increased temperature, the solute reacts faster with the solvent.

Therefore, the factors that affect the rate of solution formation are capable of either increasing the rate of solution formation or decreasing it.

Learn more about solutions here:

brainly.com/question/23946616

7 0
2 years ago
he standard enthalpies of formation for S (g), F (g), SF4 (g), and SF6 (g) are +278.8, +79.0, -775, and -1209 kJ per mole, respe
JulsSmile [24]

Answer:

+60.54 kJ/mol

Explanation:

The enthalpy of formation of a compound is the sum of the enthalpies of the formation of its constituents and the bond of them. To form a compound, energy must be lost, so, they're negative.

For SF4, the enthalpy is formed by the energy of one S, two F, and 4 S-F bond (Hb):

H = - (278.8 + 4*79.0 + 4*Hb)

-775 = -(594.8 + 4Hb)

594.8 + 4Hb = 775

4Hb = 180.2

Hb = +45.05 kJ/mol

For SF6, the enthalpy is formed by the energy of one S, six F, and 6 S--F bonds (Hb):

H = -(278.8 + 6*79.0 + 6*Hb)

-1209 = -(752.8 + 6Hb)

752.8 + 6Hb = 1209

6Hb = 456.2

Hb = +76.03 kJ/mol

Thus, the energy of S--F bond must be the average of these two:

(45.05 + 76.03)/2 = +60.54 kJ/mol

3 0
3 years ago
How many molecules of atp are produced as a result of glycolysis
Whitepunk [10]

Answer:

2 ATP molecules are produced

8 0
2 years ago
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