Examine each of the following pie charts. Which one shows the correct makeup of Earth's atmosphere?


A
A


B
B


C
C


D
D

Answer:

Answer A

Explanation:

atmosphere is made up of approx 78% N and 21% O2

Please, I need this now.
Drag each label to the correct location on the image.
Match each situation to the circuit diagram that represents it.

A 6.39L balloon filled with gas is warmed from 239.3K to 305.9K. What is the volume of the gas after it is heated?

which of the following changes different colours in alkalis,acids,and neutral substances?

A red litmus paper
B Blue litmus paper
C universal indicator
D all of the above​

Anyone know this? Cuz I don’t this one is

Based on the Law of Conservation of Mass, what's the minimum amount of Magnesium that will react with 32g of Oxygen to produce 80.6g of Magnesium Oxide?​

a
Scientists have observed that the average surface temperature of the Earth has been increasing. This increase has
affected the oceans. Glaciers and ice sheets melt, and water from this melting process becomes part of the oceans.
The increasing temperature of the Earth's surface also warms ocean waters. As a result, the volume of the oceans
expands. These two events affect sea level.
What would happen to sea level if the average surface temperature trend that was observed since the 1960s
continues?
A) Sea level will rise, then will suddenly fall.
B) Sea level will remain the same.
C) Sea level will continue to fall.
D) Sea level will continue to rise.
Please select the best answer from the choices provided
O A
OB
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Which two organisms are most likely to be competitors?

chipmunk, cow
snake, hawk
snake, badger
chipmunk, badger

please help I'm stuck on this!
What effect does sunlight have on CO2 molecules?

sodium oxide can react with water to produce sodium hydroxide. in the reaction, how many moles of sodium hydroxide will be produced.

Using the notation just described, represent a cell based on the following reaction:

ClO3−(aq)+3Cu(s)+6H+(aq)→Cl−(aq)+3Cu2+(aq)+3H2O(l)

Pt is used as an inert electrode in contact with the ClO3− and Cl− .

Drag the appropriate labels to their respective targets. For neutral species, leave the pink target blank.

Denzel has a flask containing a mixture of rocks, soil, iron filings and salt. He needs to separate the four components of the mixture. Create a method to successfully separate each of the components of the mixture. HINT: use their physical and/or chemical properties.

what are the products for the following equation?

ZnBr2 + F2 -> ​

A sample of an ideal gas has a volume of 2.22 L at 284 K and 1.11 atm. Calculate the pressure when the volume is 1.95 L and the temperature is 305 K.

Which list of phases of H2O is arranged in order of increasing entropy

PLEASE HELPPPPP I WILL GIVE BRAINLIEST!!!!!
How many grams of ammonium sulfate can be produced if 2500.0 g of H2SO4 react with excess NH3 according to the equation 2NH3(aq) + H2SO4(aq) → (NH4)2SO4(aq)? Calculate the percent yield if 3100 g (NH4)2SO4 were actually produced.
-Calculate the theoretical yield of ammonium sulfate.
-Calculate the percent yield for the associated question
-Write the unit for the theoretical yield (see related question)

4. What is the movement of blood through your blood vessels called?
circulation
digestion
nervous

What’s the answer for this?

complete and balance the following equation b. Br2 + Nacl​

state 3 commercial uses of oxygen​

What are 3 types of insects that belong to Phylum ?

1. In sheep, a gene with two alleles decides wool color. The allele for white wool is

dominant to the allele for black wool. If two heterozygous sheep mate, what

percentage of the sheep will have white wool? Record your answer as a

percent.

White wool

Black wool

HINT: Create a Punnett square on scratch paper to determine the answer.

Which of the following helps explain why experiments involving speed and velocity are important? (1 point)
Experiments involving speed and velocity are important because they have not been investigated much and scientists still do not fully understand how speed and velocity are related
Experiments involving speed and velocity are not important because they have already been thoroughly investigated by scientists and there is nothing more to learn.
Repeated experiments with airplanes and how their velocity changes as a result of environmental conditions like wind can help scientists develop a model for flight paths and launch times to
minimize fuel usage
O Repeated experiments that change motivational foods for tortoises on tracks can help scientists determine preferred eating habits

How many moles of water (H20) are produced when 2 moles of KMnO, react with plenty of HCI? Show work if can will give most points :) !!

How many moles of lead chloride pbCl2, will be produced if 10.0 moles of Orion chloride FeCl33 reacted

Pots A and B both have plain soil, bean seeds, and the same amount of light. Pot B receives more water (see table). After 50 days the plants are measured. Based on the data, which of the following conclusions can NOT be drawn from the data table?




A plant that receives more water will have more mass

The amount of water a plant receives affects its growth

The taller a plant is, the more mass it has

A plant that receives more water will grow t

What is the equilibrium constant for the reaction at 644 K ?

In 1-2 sentences, describe what happens to atoms of a compound when a chemical reaction occurs​

Question 6 of 10
What does it mean when a reaction is spontaneous?
O
A. The reaction requires added energy.
B. The reaction goes to completion.
C. The reaction occurs rapidly.
O O
D. The reaction happens by itself.
SUBMIT

What is the name of an isotope with 23 protons and 25 neutrons?
Select one:

Cadmium

Vanadium

Chromium

Manganese

Is god real I don’t really no but say yes