Answer:
Day and Night
Explanation:
Google :)
If the molecules of two different substances have a similar size but the molecules of one substance are polar while the molecules of the other substance are nonpolar, what is most likely true about the substances? A. The polar substance has a lower boiling point than the nonpolar substance. B. The nonpolar substance has a lower boiling point than the polar substance. C. Both substances have similar volatilities. D. Both substances have similar solubilities
Answer:
B. The nonpolar substance has a lower boiling point than the polar substance
Explanation:
i just took the test review on edge 2020 and i got it right :)!! so sorry this answer is a little late ::
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:
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
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.
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
1. Using prefixes, name this molecule: H20.
Answer:
water
Explanation:
the scientific answer would be hydro but it also means water
Beryllium has an atomic number of 4 and an atomic mass of 9. How many neutrons does Beryllium have?
Answer:5
Explanation:
f.
piall IL WILT
What is octet? Why is it inactive?
Answer:
Join here if u r a girl owu-bqfx-fvq
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:
Please help me answer these true or false chemistry questions!! 33 points!!
1) Galium's (Ga) electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1 = TRUE OR FALSE
2) Galium has two valence electrons = TRUE OR FALSE
3) Iridium electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d7 = TRUE OR FALSE
4) Iridium (Ir) has two valence electrons = TRUE OR FALSE
5) Oxygen's orbital notation is 1sX 2sX 2pX// = TRUE OR FALSE
6) Scandium's (Sc) orbital notation is 1s2 2s2 = TRUE OR FALSE
7) Carbon (C) noble gas abbreviation is [Rn] 7s2 = TRUE OR FALSE
8) Neon's (Ne) noble gas abbreviation is [Xe] 6s2 4f6 = TRUE OR FALSE
9) Lithium's noble gas abbreviation is [He] 2s1 = TRUE OR FALSE
10) The long form electron configuration of Iodine ion with a -1 charge (I^-1) is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 = TRUE OR FALSE
11) Iodine ion with -1 charge is isoelectronic with Neon = TRUE OR FALSE
12) Calcium ion with +2 charge's (Ca^+2) electron configuration is 1s2 2s2 2p6 3s2 3p6 = TRUE OR FALSE
13) Calcium ion with +2 charge is isoelectronic with Argon (Ar) = TRUE OR FALSE
14) Helium's Electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 = TRUE OR FALSE
15) Helium is isoelectronic with Xenon (Xe) = TRUE OR FALSE
16) The neutral 1s2 2s2 2p6 3s2 3p5 atom is Cl = TRUE OR FALSE
17) The atom with the -1 charge and the electron configuration 1s2 2s2 2p6 3s2 3p6 is Cl-1 = TRUE OR FALSE
18) The atom with the -3 charge and the electron configuration of 1s2 2s2 2p6 3s2 3p6 is P^-3 = TRUE OR FALSE
19) The quantum number for Chlorine ion with -1 charge is (3, 1, +1, -1/2) = TRUE OR FALSE
Thanks to anyone that answers!!
Answer: 1) True
2) False 4)False 5)True
Explanation: I took a test that had similar questions
What is an atom? Is it stable? Give reasons to support your answer.
HELP ME PLEASE ILL MARK BRAINLEST
Answer:
Tissues And Organ Systems I Have Answered This Question Before-
Explanation:
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.
Who is Gregor Mendeſ, and what did he
discover about traits?
Answer:
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Through his careful breeding of garden peas, Gregor Mendel discovered the basic principles of heredity and laid the mathematical foundation of the science of genetics.
Explanation:
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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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
Energy for this ecosystem originally comes from
A. water
B. consumers
C. sunlight
D. plants
Answer:
sunlight is the answer i think
For strontium chloride, the light released when electrons transition between energy levels has a wavelength of 630 nm. Calculate:
the wavelength in meters
the frequency in Hertz
the Energy in Joules
Based on its position in the table, with which other element do you think calcium might react?
A. Sulfur
B. Fluorine
C. Nitrogen
Answer: sulfer
Explanation:
what compound has a molar mass of 72.67g/mol???
Answer:
oxygen? but that's not a compound that's an element
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 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
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
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.
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.
HELP ILL MATK YOU AS BRAINLEST
Answer:
Tissues And Organ Systems
Explanation:
gram mass formula of glycine
Answer:
75.07 g/mol
Explanation:
75.07 g/mol
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 ....
