Chemistry Middle School

____CaSO 4 , ____O2 +____CaS

____CaSO 4 , ____O2 +____CaS

Answers

Answer 1
1 CaSO4, 2 O2 + 1 CaS :)
Answer 2
1CaSO4 —> 2O2 + 1Cas

This way the number of atoms of each element/compound is the same for the reactants and products

Related Questions

Melvin is exploring the different kinds of changes that can happen to substances. After reading about the kinds of changes that occur, he saw some rust on a pipe that was going into his house. What kind of change is the formation of rust?

A.reactant
B.physical
C.chemical

Answers

Answer:

It is B. physical.

Explanation:

The rust on the pipe is something causes by something, which mean it is physical. Hope this helped you out!!

Have a wonderful day! :D

I think it’s c because when ever it rains it make medal rust

Answer please 10 points science queasy

Answers

Answer:

B

Look up cumulonimbus clouds it looks like b

I believe the answer would be B. Cumulonimbus looks mostly like that.

Beginning
1
Nutrients are absorbed by blood in tiny blood vessels.
2
Mechanical digestions using teeth, and chemical digestion using saliva.
3
#
Mechanical digestion using organ walls, and chemical digestion using acids.
4
Water is removed from unused food, which is then compressed.
End

Answers

Answer:

yeah it is

Explanation:

what rhe ebenja

Help! Quicklyyyy! Easy science thing.

Answers

Answer:

A year too late..

Explanation:

Help me with this please! Do not say "I don't know" to get my points!!!!!!! It is not helpful and disrespectful. THANKS!

Answers

no- and na- nano5

na- and na+ nana2

hope this helps

Explanation:

Why do you think the Na+ ion is smaller than a neutral Na atom? Why do you think the Cl - ion is larger than a neutral Cl atom?

Answers

Answer:

Na+ ion is smaller than a neutral Na atom in the ion there was one more proton which will attract electron bring it closer to the center making the atomic radius smaller. Therefore making a Na+ ion is smaller than a neutral Na atom Explanation:

yes

Please help me with this question

Answers

Answer:

B

Explanation:

Why does the Earth spin faster at the equator than the poles?

a
Due to the temperature differences on Earth, the land/sea near the equator goes at a faster rate. The Earth spins faster there only during the summer months.
b
The Earth is much wider at the equator than at the poles. It must cover a larger distance in the same amount of time (24 hours).
c
Due to the tilt of the Earth on its axis, the equator gets more sunlight -- therefore making it spin faster.

Answers

Answer:

Specifically, Earth rotates faster at the Equator than it does at the poles. Earth is wider at the Equator, so to make a rotation in one 24-hour period, equatorial regions race nearly 1,600 kilometers (1,000 miles) per hour. Near the poles, Earth rotates at a sluggish 0.00008 kilometers (0.00005 miles) per hour.

HELP PLEASEEE
How do we know what is inside the Earth? (How do we know the Earth has layers?)

(if you put a random answer for the points i will report)

Answers


Scientists know about the layers of the earth by sending sound waves through the earth. Because layers of different densities will allow sound waves to travel through them differently, we can study the sound waves to understand the layers of the earth.
Scientist use special technology to figure out what is inside of the Earth

This mountain top is covered with trees. A forestry company wants to remove the trees for lumber.

Which will most likely happen to the rocks on the mountain if the trees are removed?
A. Wind and rain will begin to erode the rocks and the mountain will flatten over time. B. New trees will grow back very quickly and the mountain rocks will not be changed. C. The mountain will quickly become much smaller without the protection of the trees.
D. The mountain will grow as additional sedimentary rocks are formed.

Answers

I think it's A

Explanation:

I don't really got an explanation i just have the feeling

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The Dust Bowl was a time In the 1930s when prairie states in the Midwest had farmlands torn apart by wind erosion and storms. This disaster caused food shortages and financial hardship. What practice is most helpful to prevent another similar tragedy?

A. no-till farming to allow roots to hold soil together
B. over watering of fields to keep soil wet
C. terrace farming by putting walls up on hills
D. agricultural reform to change the types of crops planted

Answers

D. I might be wrong but I learned this a while ago

Answer:

C

Explanation: The dust bowl killed many crops resulting to low nutrients

Answer please 10 points

Answers

Answer:

water

Explanation:

Answer:

Water

Explanation:

Most of the Earth is covered with water, so water is the substance.(H20)

Summarize the Natural Processes of weathering ,erosion, and deposition

Answers

Answer:

I won’t do it in paragraph form cuz it will look very choppy but here you go:

Weathering is when the weather itself changes something, like when a metal bike gets rusty after sitting outside for a long time, or when a plant grows out of concrete.

Erosion is when something gets eroded away at. Like when something has water or wind is flowing against it so much that it changes shape. This is how canyons are made.

Deposition is when a gas turns into a solid, removing energy and skipping the liquid step (frost forming on car window)

Weathering : Weathering is the breaking down or dissolving of rocks and minerals on Earths surface.

Erosion : In earth science, erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location (not to be confused with weathering which involves no movement).

Deposition : Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.

Hope this helps

\Which type of graph would best represent data from this experiment: Which sport is most popular? Question 2 options:
A. Bar graph
B. Circle graph
C. Line graph

Answers

Answer:

bar graph and line graph

Circle graph because you can see all the different sports and the percentages of how popular they are in a circle

can you please help. I don't know how to do it.

Answers

The area used to be covered by an ocean

Which two factors that influence weather are caused by the uneven heating of
Earth's surface by sunlight?
A. The formation of ocean currents that carry cold or warm water
B. The curving of an ocean current's path as Earth rotates
C. The formation of convection currents in the atmosphere
D. The curving of an air current's path as Earth rotates

Answers

B, sorry if i am wrong.
I guess it C. The formation of convection currents in the atmosphere

Which of these is not considered a pure substance?
An atom
A mixture
An element
A compound

Answers

Answer:

A mixture is not a pure substance.

A compound because it is mixed with more then one thing which means it’s not pure

Is there a relationship between cohesion and volume?

Answers

Cohesion is the attraction of water molecules to stick to each other, technically there would be a relation to cohesion and volume because the more the water droplets come together the more volume there is. But, volume is how much space a substance occupies so the actual definition of the two words is different.

I need help with the question in the photo!!

Answers

Answer:

a semi-crystalline structure is formed, which holds the water molecules apart, making ice less dense than liquid water, such that it floats. This means that it insulates the water beneath, allowing organisms in the liquid water to survive. Cohesion is the tendency of molecules within a substance to ‘ stick together

explanation:

The person is right btw

at least two examples
of Chemical Formula

Answers

Explanation:

Rotting, withering, heat and light emission, precipitate formation, gas evolution, or a change of appearance.

Answer:

h20 (water duh)

C9H13N (Amphetamine)

C6h1206 (glucose)

In a __________________ reaction, elements are not changed, just rearranged. Small amounts of energy take place.
a. Endothermic
b. Exothermic
c. Nuclear
d. Chemical

Answers

D. Chemical.
In a chemical reaction, elements are not changed, just rearranged. Small amounts of energy take place.

When an apple falls from a tree, when does gravity act on the apple?

Answers

Gravitation Potential energy is converted into the Kinetic Energy, when it just reaches the ground. Some amount of energy is wasted in sound and heat energy when it strikes the ground. When the apple falls from the tree, it has some gravitational potential energy due to its height.
it has potential energy once it drops from the tree and a gravitational pull

The pictures show a large star statute when it was placed in front of the observatory, and the star five years later.

image

What best explains happened to the star statue?

A. weathering by low temperatures
B. erosion by high temperatures
C. weathering by wind and rain
D. erosion by wind and rain

(SORRY THE IMAGE DIDNT LOAD)

Answers

Answer:

kjklllllllllllllllllll

Explanation:

jl              m        

How should Point 2 on the Land Breeze diagram be labeled?
a
Cool air, high pressure
b
Cool air, low pressure
c
Warm air, high pressure
d
Warm air, low pressure

Answers

B because when it so cold it gose up and then they is no perssure

Please helpp!!!!!!!!
If the pattern of ions shown here for galena is expanded in every direction, how many sulfide ions would surround each lead ion? How many lead ions would surround each sulfide ion?

Answers

Answer:

the answer is the earths crust because those are the icons surrounded each sulfide.

Explanation:

hope this helps!!! i love science/cemistry

the atomic number of an element is the number of ______ plus the number of _____ found in the element's nucleus.

Answers

Answer:

protons and electrons

Explanation:

The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom. To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number.

1. Protons 2. Neutrons?

PLEASE HELP ME ITS DUE IN 1 HOUR PLZZZ

Answers

I can’t use evidence from the picture but the green slime from the pond that they are talking about is called Algae, which is alive and can grow quickly with sunlight or any other source of energy such as water and carbon dioxide. Hope this helps!!
I can tell me and you have chemistries

What reaction type is MgCl2 ---> Mg + Cl2 ?
a. Synthesis
b. Single Replacement
c. Double Replacement
d. Decomposition

Answers

Answer:

A.Synthesis

Explanation:

What reaction type is MgCl2 ---> Mg + Cl2 ?

a. Synthesis

b. Single Replacement

c. Double Replacement

d. Decomposition

Answer

A. Synthesis.

A sorry if I’m wrong

Definition: Water that falls to the ground as rain

Answers

Precipitation.
That’s the answer

Where does energy for all living things come from FIRST

Answers

Answer:

The Sun is the major source of energy for organisms and the ecosystems.

Explanation:

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Joshua makes $50,000 a year and pays 24% of their income in taxes. Zoey makes 90,000 a year and pays 28% of their income in taxes. What type of tax structure explains this difference?O ProgressiveProportionalCFlatRegressive How does our Snow White story teach us about beauty definitions today? What is the danger in comparing ourselves to others? Why was the Rosetta Stone so important to understanding Ancient Egypt.1.It allowed archeologists to learn how Egyptians kept time2.It allowed archeologists to translate hieroglyphics and Demotic writing so we understand Egyptian language3.It allowed archeologists to learn the kind of paper and writing utensils Egyptians used need help what the awnser is.b - 6 = 21 Solve the equation: 5 + 2(3 + 2x) = x + 3(x + 1) Solve for the value of n.(9n)(8n+8) One brother says of his younger brother: Two years ago, I was three times as old as my brother was. In three years time, I will be twice as old as my brother. How old are they each now?Good Luck!! Find the length x.5X45PLS THIS IS ERGENT Zhang Industries budgets production of 220 units in June and 230 units in July. Each unit requires 1.5 hours of direct labor. The direct labor rate is $12.40 per hour. The indirect labor rate is $19.40 per hour. Compute the budgeted direct labor cost for July. Definition: Water that falls to the ground as rain PLS HURRY 25 POINTS AWNSER ASAP!!!!What was significant about the Battle of Kings Mountain?It was the first major battle fought in the Southern colonies.It was the final battle of the war and the ultimate defeat of the British.It was the first in a series of battles that led to Britain losing the war.It was the first time a battle was fought in the North Carolina colony. If the area of a semicircle is 77cm then find its perimeter. Identify the moon phase pictured belowIDENTIFY There are 120 students and 23 teachers going on a class trip. The buses used for the class trip hold at most 45 passengers. How many buses will be needed? Need help pls if you can A river current has a velocity of 5 km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. How can the velocity of the boat relative to the shore be calculated?a.by subtracting the river current vector from the boats velocity vectorb.by dividing the river current vector by the boats velocity vectorc.by multiplying the vectorsd.by adding the vectors In otters, the allele for brown fur (B) is dominant over the allele for silver fur (b). Two brown otters mated and a silver pup (baby otter) was born. What were the genotypes of the parents? find the domain of the graphed function please help me write in exponential notation ASAP A cyclist tide his a bike at a speed of 27 miles per hour. What is this speed in miles per minute? How many miles will the cyclist travel in 15 minutes? Do not round your answers