All categories

3 years ago

Which of the following is a change in which the identity of the substance

Chemistry

1 answer:

sergey [27]3 years ago

3 0

Answer:

physical

Explanation:

physical is the answer not chemical

I think so

You might be interested in

I have an unknown volume of gas at a pressure of 0.5 atm and a temperature of 325k if I raise the pressure to 1.2 atm, decrease

Nimfa-mama [501]

Use the Equation of Clapeyron:

$\frac{P_1.V_1}{T_1}=\frac{P_2.V_2}{T_2}\\
\\
\frac{0.5V_1}{235}=\frac{1.2*48}{320}\\
\\
320*0.5V_1=235*1.2*48\\
\\
V_1=\frac{235*1.2*48}{320*0.5}=84.5 liters$

7 0

3 years ago

Care sunt factorii de poluare a aerului?

bulgar [2K]

Answer:

Arderea de combustibili fosili, activități agricole, eșapament din fabrici și industrii, operațiuni miniere și poluarea aerului interior

8 0

3 years ago

A sample of copper absorbs 4.31E+1 kJ of heat, resulting in a temperature rise of 6.71E+1 °C. Determine the mass (in kg) of the

olga2289 [7]

Answer: 1.67 kg

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

$Q=m\times c\times \Delta T$

Q = Heat absorbed= $4.31\times 10^1kJ$ = $43100J$ (1kJ=1000J)

m= mass of substance = ?

c = specific heat capacity = $0.385J/g^0C$

Change in temperature , $\Delta T=T_f-T_i=6.71\times 10^1^0C=67.1^0C$

Putting in the values, we get:

$43100J=m\times 0.385J/g^0C\times 67.1^0C$

$m=1670g=1.67kg$ (1kg=1000g)

Thus the mass (in kg) of the copper sample is 1.67

3 0

3 years ago

Help ASAP 15 points

garri49 [273]

Answer: number 1

Explanation:

6 0

2 years ago

Upvoting all answers !!

kvasek [131]

A covalent bond describes two atoms (most likely nonmetals) that share their valence electrons to satisfy the octet rule. Carbon and oxygen are both nonmetals, and they would share electrons with each other through a bond that is not polar enough to be considered ionic. The answer should be B

4 0

3 years ago

Read 2 more answers