All categories

3 years ago

This one is actually 30 points chem quesitons

Chemistry

1 answer:

GuDViN [60]3 years ago

5 0

Answer:

The answers to your questions are below:

Explanation:

Question 31 Silicon and sulphur, because they are in the same period (3)

Question 34 the third option, density is not in the table

Question 37 group 1A alkali metals

Question 38 group 1A, oxygen group

Question 39 They are metalloids

You might be interested in

Chem help please. i cant figure out this problem

xxTIMURxx [149]

11 a- ions would exist in the solution, they can carry charges.

B-solids that are neutral, they wouldn't conduct much of a current.

3 0

3 years ago

Use the image below to help you answer this question: Your friend has a red laser pointer. What would happen to the light coming

Lorico [155]

Answer:

the light would be less bright

Explanation:

6 0

3 years ago

What is the mission statement for the ankeny substance abuse project?

Katyanochek1 [597]

The Ankeny Substance Abuse Project (ASAP) is a nonprofit alliance of Ankeny area volunteers representing businesses, churches, civic groups, families, public agencies and other organizations dedicated to fostering a safe community free from illicit drugs and alcohol abuse.

Hope this helps.

3 0

3 years ago

Salt water can be desalinated by distillation. How much energy is needed to convert 175 g of salt water at 28.0 °C to water vapo

Vinil7 [7]

Answer:

$\Delta H=4.63x10^{5}J=463kJ$

Explanation:

Hello,

In this case, we find the following states:

a. Liquid salt water at 28.0 °C.

b. Liquid salt water at 102.5 °C.

c. Vapor salt water at 102.5 °C.

The first process (1) is to heat the liquid water from 28.0 °C to 102.5 °C and the second one (2) to vaporize the liquid salt water. In such a way, each process has an amount of energy that when added, yields the total energy for the process as shown below:

$\Delta H=\Delta H_1+\Delta H_2\\\Delta H=mCp\Delta T+m\Delta _VH\\\Delta H=175g*5.19\frac{J}{g*K}*(375.65K-301.15K)+175g*2.26\frac{kJ}{g} *\frac{1000J}{1kJ} \\\Delta H=4.63x10^{5}J=463kJ$

Best regards.

4 0

3 years ago

You get a can of soda from the vending machine and your “friend” maliciously shakes it when you’re not looking. You open the can

vaieri [72.5K]

Physical Change because a new substance was not created and if it was a chemical change, a new substance would have to be created.

8 0

3 years ago

Read 2 more answers