Jerome had read about plate tectonics and the mid-Atlantic ridge. He investigated by reading further, learning that evidence existed to show volcanic activity was happening along the mid-Atlantic ridge. How do the pillow-shaped rocks found there provide evidence that volcanic activity is taking place? A. They form only when molten material cools slowly in warm water. B. They form only along subduction zones in the trenches of the Atlantic. C. They form only when lava erupts above the water when the air is cool. D. They form only when molten material hardens quickly in cold water.
plz anwser this a b c d
browser on for the first question the answer is beaker a .
for the second question it is a (I think),
Explanation:
land heats up faster than water so if there's more water then it will be colder. because it's kind of diluted
The items on the left side of the equation are called the ________________. Coefficient c. Reactants Subscript d. Products
Answer: Reactant
Explanation: Reactants are starting materials and are written on the left-hand side of the equation.
Answer:
reactants
Explanation:
The diagram of a water molecule above has the bond between the hydrogen and the
oxygen labeled. Why does the hydrogen atom and the oxygen atom bond?
A. atoms bond because there is just an attraction between atoms. There is nothing made of matter that holds them together
B. atoms Bond because they produce some thing that makes them stick together. The thing that holds them together is a substance made up of matter
C. atoms bond because the structure of an atom has a part that connects it to another atom that is made of matter
D. Atoms do not bond
Answer: A
Explanation: because of its positive and negative charges
what compound has a molar mass of 72.67g/mol???
Answer:
oxygen? but that's not a compound that's an element
145.8g of Mg contains how many moles?
Gold is considered a precious metal because not only is it relatively rare compared to other metals. It also has a few very useful physical properties. It is able to be bent and rolled into a win
can be flattened into a very thin sheet, and it allows electricity and heat to flow through it very well
What physical properties does gold have that make it valuable,
It is a rare metal that is not easy to find
It is conductive, malleable, ductile
It is soluble in a liquid
It can burn easily when heated
Answer:
B) it is conductive, malleable, and ductile
Name the components of an atom which determines each of the following
quantities
A. Mass of an atom
B. Charge of an atom
Answer:
answer is Proton.
Explanation:
because electron is too heavy and other one has no charge
please help, this is for an important grade i really need this..
Answer:
B.
You won't be able to see it cause the dark part of the moon is facing the Earth and isn't receiving any sunlight from the sun
need help with this.
please help i will mark brainliest which helps bring up youre rank
Answer:
push or pull
Explanation:
what are the two kinds of electricity?
1.positive and negative
2.weak and strong
3.north and south
4. current and static
Answer:
4.Current and static electricity
Explanation:
HELP ILL MATK YOU AS BRAINLEST
Answer:
Tissues And Organ Systems
Explanation:
what is the chemistry of acid and base
Answer:
Of what?
Explanation:
But uhh: An acid is a substance that donates protons or accepts a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.
gram mass formula of glycine
Answer:
75.07 g/mol
Explanation:
75.07 g/mol
True or False Hydrogen is amable used to in limpa
Answer:
False
Explanation:
Answer:
false
Explanation:
false
Energy for this ecosystem originally comes from
A. water
B. consumers
C. sunlight
D. plants
Answer:
sunlight is the answer i think
Match the term with its description. (4 points)
1.
Heterogeneous
2.
Colloid
3.
Homogeneous
4.
Emulsion
a.
A mixture in which microscopically insoluble particles are suspended throughout another substance
b.
A mixture in which two or more liquids are mixed that normally are not mixable
c.
Mixture that has its different components mixed unevenly within the substance
d.
Mixture that has its different components mixed evenly within the substance
Answer:
2B, 1A, 3D, 4C, because of the definitions, they match.
6. What is the number of electrons in an atom that has
20 protons and 17 neutrons ?
A) 37
B) 20 C) 3 D) 17
Answer:
D. 17 electron is your answer
¿Cuáles son las grasas e hidróxidos más efectivos en la elaboración de jabón?
Answer:
Las sales ideales para la saponificacion es la combinacion de grasas complejas con muchas cadenas de trigliceridos y de la soda caustia.
Explanation:
Un ejemplo de estos son la grasa vacuna o la aceite de cocina de consumo tradicional y la soda caustica que es el hidroxido de sodio.
Juntos estos dos productos forman el proceso de saponificacion.
How could sinking a ship to create an artificial reef address the problem?
A.
More divers would come to the area to explore both reefs.
B.
Many divers would go to the artificial reef instead of the natural reef.
C.
There would be more places for new species to enter the ecosystem.
D.
There would be fewer places for marine organisms to live.
Answer:
C. There would be more places for new species to enter the ecosystem.
Explanation:
The Shipwrecks established artificial reefs that address the problem of a natural reef.
The artificial reefs provide a stable growing area for corals, and habitat for fishes and new organisms along with food sources that is found in natural reefs. This helps to increase the growth of marine life.
Hence, the correct answer is "C. There would be more places for new species to enter the ecosystem."
In chemistry experiment it is determined that 4.2 moles of aluminum oxide are needed to completely react with a sample of sodium. How many molecules of aluminum oxide are there in 4.2 moles? After an experiment, 35.6 g of carbon were recovered. How many moles of carbon is this?
Answer:
Aluminium Oxide = 2.5×10²³ molecules
Carbon = 2.96 moles
Explanation:
1 mole of aluminium oxide contains 6.02× 10²³ molecules, hence 4.2 moles will contain 4.2 ×6.02×10²³ molecules
for carbon, number of moles = Mass/ Molar Mass = 35.6/12.01 = 2.96 mole
If I start with 25.0 grams of lead (II) nitrate and 15.0 grams of sodium iodide, what is the limiting reactant?
Answer:
Pb(NO3)2- Lead NitrateNaI - Sodium IodidePb(NO3)2+2NaI−→PbI2+
2
N
a
N
O
3
Moles of Lead(II) Nitrate =
m
a
s
s
/
m
o
l
a
r
m
a
s
s
= 25.0 grams//(207.20 xx 1 + 14.01 xx 2 + 16 xx 6
= 25.0 grams//331.22
= 0.075 moles
Moles of Sodium Iodide
= 15//(22.99+126.9)
= 15//149.89
= 0.100 Moles
Limiting Reagent in this case is Lead(II) Nitrate
Ratio of Moles of Lead Nitrate to Sodium Nitrate
1:2
Ratio of "moles" of lead nitrate to Sodium Nitrate
0.075 : x1
2
=
0.075
x
x
=
2
×
0.075
x
=
0.150
Thus that means 0.150 moles of Sodium NitrateTo calculate mass of Sodium NitrateSince we know that Moles =
M
a
s
s
/
M
o
l
a
r
M
a
s
s
Thus Mass = Moles×Mola
r
MassMolar Mass of NaNO3
Na - 22.99N - 14.01O - 3(16) = 4885g/molThus, Mass = 0.150×85
Mass = 12.75
Thus, 12.75g of Sodium Nitrate can be formed
As per the balanced reaction of lead nitrate and sodium iodide, one mole of lead nitrate requires 2 moles of sodium iodide. The number of moles of sodium iodide is 0.1 moles and that of lead nitrate is 0.075. 0.075 moles requires 0.15 moles of NaI but it is deficient. Thus, NaI is the limiting reactant.
What is limiting reactant?A limiting reactant in a reaction is the one with fewer number of moles or insufficient to completely react with the reagents. Thus it determines the yield of the products.
Here the balanced equation of the reaction is:
[tex]\rm Pb (NO_{3})_{2} + 2NaI \rightarrow 2 NaNO_{3} + PbI_{2}[/tex]
Two moles of sodium iodide is required for one mole of lead nitrate.
The molar mass of NaI = 149.89 g/mol
molar mass of lead nitrate = 333.2 g/mol
Number of moles of 25 g of lead nitrate = 25 /333.2 = 0.075 moles
Number of moles of NaI in 15 g = 15 / 149.89 = 0.10 moles.
The number of moles of NaI required to react with 0.075 moles = 0.075 × 2 = 0.15 (since one mole need 2 moles of NaI)
We have only 0.1 moles of NaI. Hence NaI is the limiting reactant.
To find more on limiting reactant, refer here:
https://brainly.com/question/14225536
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balance these equations
Answer:
2 Pb(NO3)2 = 2 PbO + 4 NO2 + O2
2 KNO3 = 2 KNO2 + O2
4 Al + 3 O2 = 2 Al2O3
60KI + 3H20 + 40O3 → 60KOH + 30I2 + 30O2
2 FeCl3 + SO2 + 2 H2O = 2 FeCl2 + 2 HCl + H2SO4
Check if its right
Explanation:
2Pb(NO3)2=2PbO+4NO2+ O2
4KNO3=4KNO2+2O2
8AL+6O2=4AL2O3...
I tried ....
What is an atom? Is it stable? Give reasons to support your answer.
number of atoms of phosphorus vapour in 100 gm
Answer:
is this question related to give reason?
What is the result of excess nutrients (nitrates) in North Carolina waters?
A.Algae growth is high
B.Algae growth is low
C.Algae growth is moderate
Answer:
A. Algae growth is high
Explanation:
Substances that contains high concentration of nitrates, phosphates etc add nutrients to the water body. This is because organisms like ALGAE consider these compounds nutrients needed for their growth and development. The process whereby these nutrients becomes excessive in a water body is referred to as EUTROPHICATION.
Eutrophication of a water body i.e excessive nutrients like nitrates in a water body like the North Carolina waters being described in this question will lead to rapid and excessive growth of algal species. This increase in algal growth can cause the water body to be low in oxygen content and ultimately become inhabitable by living organisms.
explain how a colored light is produced from an atom.
Answer:
When the atoms of a gas or vapor are excited, for instance by heating or by applying an electrical field, their electrons are able to move from their ground state to higher energy levels. This energy corresponds to particular wavelengths of light, and so produces particular colors of light.
Explanation:
1. Using prefixes, name this molecule: H20.
Answer:
water
Explanation:
the scientific answer would be hydro but it also means water
f.
piall IL WILT
What is octet? Why is it inactive?
Answer:
Join here if u r a girl owu-bqfx-fvq
