All categories

3 years ago

all of the following are physical properties of matter except _____. a. melting point b. color c. mass d. ability to rust

Chemistry

2 answers:

maw [93]3 years ago

7 0

Answer: d. ability to rust

Explanation: Physical Properties are those properties which does not alter the composition of the substance , which does not changes the mass and in which the chemical identity of the species is retained.

These properties are also known as observable as these can be easily identifies by observation itself.

Out of the given composition, color is most certainly the physical property . Melting point and mass also gets counted in the physical property.

Ability to rust does not include in the physical property as it changes the chemical identity of the species, thus it is always named under the chemical properties.

elena-s [515]3 years ago

3 0

Color because rust and melting is a chemical property since it changes form

You might be interested in

For the following systems at equilibrium

inna [77]

Answer:

1. CaCO3(s) <=> CaO(s) +CO2 (g) Delta H = +178 kJ/mol

Since Delta H is positive, it means the reaction is endothermic

a. An increase in temperature will will shift the equilibrium position to the right, thus forming more products

b. A decrease in the temperature will shift the equilibrium position to the left, thus forming more reactants

2. PCl3(g) + Cl2(g) <-> PCl5 (g) Delta H= -88 kJ/mol

From the above, Delta H is negative which implies exothermic reaction.

c. Increasing the temperature will shift the equilibrium position to the left, thus forming more reactants.

d. Decreasing the temperature will shift the equilibrium position to the right, thus forming more products

7 0

4 years ago

Calculate the pH of the cathode compartment solution if the cell emf at 298 K is measured to be 0.660 V when (Zn^2+)=0.22 M and(

yaroslaw [1]

Answer:

pH = 2.059

Explanation:

At the Cathode:

The reduction reaction is:

$2H^+ + 2e^- \to H_2 \ \ \ \mathbf{E^0_{red}= 0.00 \ V}$

At the anode:

At oxidation reaction is:

$Zn \to Zn^{2+} +2e^- \ \ \ \mathbf{E^0_{ox} = 0.76 \ V}$

The overall equation for the reaction is:

$\mathbf{Zn + 2H^+ \to Zn^{2+} + H_2}$

The overall cell potential is:

$\mathbf{E^0_{cell}= E^0_{ox} + E^0_{red}}$

$\mathbf{E^0_{cell}= 0.76 \ V +0.00 \ V}$

$\mathbf{E^0_{cell}= 0.76\ V}$

Using the formula for the Nernst equation:

$E = E^0 - ( \dfrac{0.0591}{n})log (Q)\\$

where;

E = 0.66

(Zn^2+)=0.22 M

Then

$0.66 =0.76- ( \dfrac{0.0591}{2})log \bigg ( \dfrac{[Zn^{2+} ] PH_2}{[H^+]^2} \bigg )$

$0.66 =0.76- 0.02955 * log \bigg ( \dfrac{0.22*0.87}{[H^+]^2} \bigg )$

3.4 = log ( 0.1914) - 2 log [H⁺]

3.4 = -0.7180 - 2 log [H⁺]

3.4 + 0.7180 = - 2 log [H⁺]

4.118 = - 2 log [H⁺]

pH = log [H⁺] = 4.118/2

pH = 2.059

8 0

3 years ago

Compute the sugar content in an 8 oz sample of a soft drink. If the sugar content as per label on the product =10g per 100ml.

Nataly_w [17]

Answer:

$m_{sugar}=23.7g\ sugar$

Explanation:

Hello,

In this case, we can first compute the volume of the sample in mL from the ounces:

$8oz*\frac{29.5735mL}{1oz} =236.6mL$

Thus, with the volume of the sample, we can compute the amount of sugar given the 10 g of sugar per 100 mL of soft drink as shown below:

$m_{sugar}=236.6mL*\frac{10g\ sugar}{100mL}\\ \\m_{sugar}=23.7g\ sugar$

Best regards.

6 0

3 years ago

7. Reproduce the following sentences as indicated in brackets. a. Urmila always goes to temple, .................... ? (Supply t

Tema [17]

Answer:

a. Urmila always goes to the temple, doesn't she?

b. Was the baby playing with the doll?

c. When will Peter start a business?

d. They have not finished the work yet.

e. She told me that her brother knows me.

f. Sita was married by Ram.

Explanation:

A. In grammar, a question tag is a very short clause at the end of a statement which changes the statement into a question. For example, in 'She said half price, didn't she?' , the words 'didn't she' are a question tag.

B. Interrogative questions/sentences often have to get a yes/no answer.

C. The "next year" will be the answer to that question. U need to ask when.

D. The have not done the work yet, therefore the answer would change from "not finish" to "have not finished"

E. Indirect speech is speech which tells you what someone said. It's like the game "telephone" indirect speech is what you tell someone else, what another person said, or what someone else tells you what another person said.

F. Passive voice means that a subject is a recipient of a verb's action.

4 0

2 years ago

How many grams of KCl are present in 55.0 mL of 2.10 M KCl?

sergiy2304 [10]

Answer:

none of the above is the answer

4 0

4 years ago

Read 2 more answers