3 Ca3 (PO4)2 + 4 CaO
So we can see that there are 3 Ca3 (Ca3, Ca3, Ca3), which means you multiply the subscript by the coefficient, meaning 9 Ca. Then we see (PO4)2, which means that there are two PO4 (PO4, PO4) so we multiply the subscript 2 by the subscript 4 on O to equal 8 O, and we multiply the subscript 2 by the subscript 1 on P (the 1 is not written) to equal 2 P.
So far we have 9 Ca, 8 O, and 2 P.
One last term, 4 CaO (means CaO, CaO, CaO, CaO) which translates to 4 Ca and 4 O.
Add them all together and you get (9+4=13) 13 Ca, (8+4=12) 12 O, and 2 P
9.
Which element is most likely to conduct heat and electricity?
A. Na B. Ca C.P D. Ne
Answer:
A. Na
Explanation:
Sodium is a good conductor of electricity and heat because it has only one electron in its valence shell.
i hope this helps :)
Answer:
C.) P
Explanation:
I believe this is correct, lmk if it's not.
Which atmospheric layer is represented by F? What are its characteristics?
Answer:
Ionosphere.
Explanation:
The atmospheric layer that is represented by F is known as IONOSPHERE.
The characteristics of Ionosphere
1. It is considered to be located in the upper layer of the earth's atmosphere due to the location of region F.
2. It is ionized by solar radiation that contains an electrical charge.
3. It functions as a reflector. This can be observed in radio waves broadcasting.
What determines whether a material melts or burns when heated?
The combustion temperature of a material determines whether a material melts or burns
Materials whose combustion temperatures are lower than their melting point gets burnt instead of melting, because before the temperature of the material is raised up to the melting point temperature, the materials gets combusted at a lower temperature known as the combustion temperature
Melting is physical change and is controlled by the physical property ( melting point ) while burning is chemical change which is irreversible.
Hence we can conclude that The combustion temperature of a material determines whether a material melts or burns
what kind of change is heating of mercuric oxide?
Answer:
Chemical change.
Explanation:
When it is heated it decomposes into mercury and oxygen gas. The mercury oxide reactant becomes the silver color of mercury. Hence, a color change can be noticed throughout the reaction.
Answer:
chemical change
Explanation:
About how many times longer than modern humans have hooved mammals lived on earth?
Answer:
I think it should be about maybe the times of the dinosaurs
also I think 23 to 16 billion years
Explanation:
No explanation sorry if im wrong
Mammals are the animals of the vertebrate group with the presence of the mammary gland. About 16-23 billion years ago hooved animals lived before humans.
What are hoofed mammals?Hoofed animals or mammals the even and odd-toed ungulates that have toes in their feet region used to balance their body weight. They have a nail-like case known as a hoof.
Hoofs protect the feet area and enable fast running in mammals. Some examples of hoofed mammals are a cow, zebra, antelope, moose, horse, deer, etc.
Therefore, humans evolved in the Oligocene Epoch and the mammals in the Cretaceous or the Jurassic period.
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_______ dm^3 = 4.0 L
Answer:
[tex]4dm^{3}[/tex]
Explanation:
1dm^3 is equal to 1L.
Calculate the number of nitrogen atoms in 20.9 grams of nitrogen.
Answer:
N=5.47×10^23
Explanation:
n=
[tex]n = \frac{m }{ar} [/tex]
N=n×la
What happens when chromium nitrate is added to distilled water
Answer:
It does not react with water, but reacts with most acids
Explanation:
Answer:
It doesn't react with water, but reacts with most acids
Find the mass of 11.37 mol of BaO. Round to the nearest whole number.
Answer:
1,354
Explanation:
How does understanding how to affect the rate of reactions add value to your life? Why is this important for you to understand?
Answer:
because if you do not react to anything you will be a misarable old lady with 5 cats sitting on you .
Explanation: bascially you cant live without reacations to life
What characterizes a system at equilibrium?
O A. The system is changing at an even rate.
B. The system has stopped changing.
O C. The system cannot undergo change.
D. There is no net change to the system.
Answer:
D. There is no net change to the system
Explanation:
Equilibrium means "equal". In a chemical system, changes occur in substances called the reactants to produce another substance called the products. These changes from reactants to products and vice versa occur at an uneven rate until EQUILIBRIUM is reached.
In other words, equilibrium is attained when the reactants and products are formed at an equal or constant rate i.e. There is no net change to the system. For example, in the chemical system below:
A + B ⇌ C + D
This system is said to be at "EQUILIBRIUM" if the rate of reaction of the reactants (A and B) is equal to that of the products (C and D). That is, there is no net change (difference) in the reaction rate.
Which of the following defines the wavelength of a wave?
Answer:
where is the questions........
Answer:Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave. Description: Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave).
Someone help please!
Answer:
D
Explanation:
When water evaporates from plants what is it called
Answer:
photosynthesis
Explanation:
I think
6. What does a numerical subscript following a set of parentheses in a chemical
formula mean?
A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical formula.
As an example, calcium hydroxide is [tex]\bold { Ca(OH)_2 }[/tex] . The subscript (2) indicates that calcium hydroxide contains two hydroxide ions.
Therefore, A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical formula.
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The melting of a glacier is an example of the interactions among which of Earth's spheres? geosphere, troposphere, cryosphere atmosphere, geosphere, cryosphere atmosphere, asthenosphere, biosphere hydrosphere, asthenosphere, atmosphere
Answer:
The melting of a glacier is an example of interaction among;
Hydrosphere, asthenosphere, atmosphere
Explanation:
The melting of a glacier is an example of the interactions among the Earth's cryosphere and hydrosphere
The cryosphere is described as the portions on Earth where water appears in solid (frozen) form such as glaciers, frozen grounds, snow covered land, sea ice, ice sheets, river ice, ice caps, etc.
The hydrosphere is all the forms water on a planet including, ice, liquid water and water vapor, therefore, the cryosphere is a part of the hydrosphere
The geosphere comprises the Earth's interior, including the asthenosphere, which is fluid and hot and therefore spread heat through both conduction and convection to the hydrosphere that raises the ocean temperatures and lead to glacier melting
The green house effect in the atmosphere results in global warming that raises the average temperature of the Earth which in turn raises the temperature of the oceans and the troposphere, resulting in melting of a glacier
Therefore, the melting of a glacier is an example of interaction among the hydrosphere, asthenosphere, and, atmosphere
How would an apple, potato, and onion all taste the same?
A) plugging your nose
B) Chewing on mint gum in intervals
C) eating them at the same time
Answer:
A) plugging your nose
This is because of your olphactory bulb being blocked. This is the series of nerve endings in your nose, that not only allows you to smell, but to taste at the same time.
What is the role of consumers in a free market economy?
Match the landform to its description.
caldera
made of pieces of lava
volcanic soil
material fills in valleys
cinder cone
bowl-shaped depression
shield volcano
wide summit, gentle slope
lava plateau
rich in nutrients
Answer:
cinder cone: made of pieces of lava
shield volcano: wide summit, gentle slope
volcanic soil: rich in nutrients
caldera: bowl shaped depression
lava plateau: material fills in valleys
Explanation:
it’s right
Answer:
Caldera, Bowl-Shaped depression
Shield volcano, Wide summit, Gentle slope
Lava plateau, Material fills in valleys
Volcanic soil, Rich nutrients
Cinder Cone, Made of pieces of lava
Explanation:
Got it right on edge
Please help, thank you! Match each organism with the correct description.
1. algae
2. rabbit
3. tiger
4. human
5. bacteria
<><><><><><><><><><><><><><><><>
A. producer
B. omnivore
C. decomposer
D. primary consumer
E. carnivore
Answer:
1. A
2. D
3. E
4. B
5. C
Explanation:
1. Plants are known as producers since they produce energy for themselves through photosynthesis.
2. The rabbit is a primary consumer since it’s herbivore and only feeds on producers for energy.
3. The tiger is a carnivore, and preys on other consumers for energy.
4. A human is an omnivore since it can gain energy from both producers and consumers.
5. Bacteria are know as decomposers since such category of organisms break down other organisms to gain energy.
Which of the following changes are classified as physical changes?
-dissolving sugar in hot tea
-petrifying wood
-cutting an apple into smaller pieces
-carving wood
-Oburning wood
complete combustion of wax take place in____ zone of a candle flame
Answer:
Non-luminous
Explanation:
Complete combustion of wax take place in non-luminous zone of a candle flame
You have two samples, one is calcite and the other is halite.
How would you differentiate between without using any equipment?
A- Colour
B- Specific gravity
C- Hardness
D- Cleavage
Answer:
c
Explanation:
You can differentiate between calcite and halite without using any measuring equipment based on: C. Hardness.
What is a mineral?A mineral can be defined as a form of naturally occurring, inorganic solid substance that is typically characterized by a crystal structure.
The properties of a mineral.In Science, the properties that can be used to identify and differentiate two or more minerals include the following:
LusterStreakHardnessIn conclusion, hardness is a mineral property that can be used to differentiate between calcite and halite without using any measuring equipment.
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Lead from a car battery has been detected in a lake far from where the battery was discarded. How did the lead get there?
Answer:
The way that lead got to the river is by transportation through soil. When the battery got buried it was still leaking and it moved through the pores of soil and was able to travel very far away to the lake.
Explanation:
Describe the natural processes which remove carbon dioxide from the atmosphere
Answer:
Explanation:
The process is photosynthesis as plants need carbon dioxide and humans need oxygen so plants release oxygen which humans breath/take in and plant/trees take in carbon dioxide which humans release.
The natural process which removes carbon dioxide from the atmosphere is photosynthesis.
What is photosynthesis?
It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.
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please I don’t get this at all someone help
A confined quantity of a gas has a pressure of 2.50 atm and a temperature of -22⁰C. What is the new pressure if the temperature is increased to 22⁰C?
a. 2.1 atm
b. 2.5 atm
c. 2.94 atm
d. 3.41 atm
Answer:
C Ian sure2.94atm
Explanation:
I am low student
helpppp PLSSSSSSSSSSS
Answer:
I think 213g
Explanation:
Im not that smart in stuff based in this subject but I think its right but If anyone knows for sure fact check me plz....
Where on the periodic table are metalloid elements most likely found?
A Along the stairstep line
B. Among the lanthanides and actinides
C. At the bottom
D. On the left side
D on the left side because if you look st periodic table it shows were most of the medallions are founf
Answer:
its the right side ik its not an option on here but its the right side on some
Explanation:
trust me
All living organisms are composed of
I need help on this, i'll give 30 pts for brainliest
Answer:
All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.
Explanation:
Answer:
All living organisms are composed of one or more cell
Explanation:
hope this helps, please mark brainliest