Given the reaction that occurs in an electrochemical cell:

Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)

During this reaction, the oxidation number of Cu changes from

A) 0 to +2

B) 0 to –2

C) +2 to 0

D) –2 to 0

Answer:

c) +2 to 0

Explanation:

SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge

Cu(s) is a solid metal and they have no charge, therefore it is zero

Copper undergoes Oxidation (gain of electrons)

⚠️ILL MARK BRAINLIEST!⚠️


What is the speed of light? If light travels 31% slower in fiber optic line, how fast does light travel through the line?

Which feature forms when magma cools beneath Earth's surface?


Geysers


Calderas


Batholiths


Vents








Note- Meant to put it for Geography my bad

What does this diagram represent?

A) a turbine
B) a motor
C) an electromagnet
D) a generator

Hello i need help with #2

these days cloths made out of a mixture of synthetic fiber and natural fibers are more popular than those made purly out of synthetic fiber. Discuss the reason for this

PLEASE HELP ASAP
Avanti works in a bookstore. She has four books and is going to place them in two stacks. The diagram above shows the books before they touch. Use the information in the diagram to answer the question.
How did the temperatures of the four books compare before they touched?

1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL

a) The formula of a compound is AB. If the valency of B is 3, what will be the valency of A? b) Baking soda is a white solid and has the formula NaHCO3. How many of each type of atoms are there in it?

I need this answer before 7 can anyone help me please!

Help RRLY EASY I JUST DONT UNDERSTAND

Please help im in a rush and im at therapy so i need to finish this


What is a mixture?

Atomic symbols cannot be used to communicate...

A.the size of an atom.

B.the charge of an atom.

C.the number of neutrons.

D.the number of protons

DOES a single population have a lot of genetic diversity in it when it is always reproducing together?

Henry is in the community investigating sources of chemical energy for his science experiment. Select the best examples of chemical energy Henry can use.

A. A gas station and people playing hopscotch
B. A squirrel eating acorns and a fire burning
C. Someone reading a book and eating a sandwich
D. Someone sliding down the slide and someone drinking water

What are some of the benefits of hydropower? select all that apply

Select 3 correct answer(s)
Question 2 options:

It can also provide flood control and water supply


It is renewable and reliable


It can prevent fish from swimming upstream


It reduces the amount of carbon dioxide released into the atmosphere during energy production

Most cells have a(n) in the center of the nucleus which stores materials to make ribosomes.

Scientists have discovered a colony of potential organisms on the Planet Moby and named them "Maxoids." Read the information below that scientists have gathered on Maxoids and decide whether Maxoids are living or nonliving things. Explain how you came to this conclusion.

Through testing and observation, scientists have recorded the following characteristics of Maxoids. Maxoids reproduce via sexual reproduction. One parent carries the Maxoid eggs for 12 weeks before they hatch. After hatching, juvenile Maxoids continue to grow for seven months. To acquire energy for growth, Maxoids consume a peculiar liquid substance native to the planet Moby. The Maxoids' cells use this energy, as well as large amounts of water, to carry out important functions. The Maxoids are sensitive to changes in internal temperature. Sometimes they dig holes and lay in them to cool down if they get too warm.

If you freeze 5 mL of water into ice and then let it melt, how much water will you have?
None
5 mL
10 mL
Unlimited

piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap

The diagram below represents a beaker of water being heated by a flame. The arrows represent heat transfer occurring in the beaker.
Which process is represented by the arrows in the diagram?
1. condensation
2. conduction
3. convection
4. radiation

I need help with this science question that I didn't do yesterday and is now missing can you help? Convection (____________ of the liquid metal) in the Outer Core creates the Earth’s magnetic field.Thanks if you do help you get 10 points.I can't find regular science that's why it says chemistry.

Which of the following correctly lists the parts of the water cycle?

1. Evaporation, condensation, temperature, precipitation, collection
2. Condensation, build-up, runoff, precipitation, collection
3. Runoff, precipitation, evaporation, melting, condensation
4. Evaporation, condensation, precipitation, runoff, collection

Part A: ____ objects are more dense
Part B: ____ Objects are less dense

How is the momentum of an object determined?
What happens every time one of the boys playing ping pong hits the ball?
How could the boy playing ping pong keep from hitting the ball off the table?
I GIVE 20 PTS PLS HEELP

The table shows the specific heat of four substances. The substances are exposed to the Sun for the same length of time. Arrange them in order beginning with the substance that will heat up the fastest.

water dry sand wet sand rock

What is the name given to this group of elements?

a.
halogens
c.
transition metals
b.
alkali metals
d.
noble gases

which of the following statements beast describe how the organelles cycle carbon through the biotic and abiotic factors of an ecosystem .

How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)

a. The atom’s volume increases.

b. The atom’s mass increases.

c. The atom becomes positively charged.

d. The atom becomes negatively charged.

Please help me with this I will give out extra points with the brain thing if you help me with this science question 1/7 image below. I promise

Please help me por favor :'(