Answer:
+2
Explanation:
Elements in group 2A have 2 valence electrons in their outer shell, so when they bond with other atoms, they are most likely to give away these 2 electrons. With 2 electrons gone, the ion will have a positive charge (since there are now more protons than electrons in the atom).
Which of the following is the most accurate description of chemical energy? A. The energy released by heat in a chemical reaction B. The energy in the motion of the substance C. The energy stored in the chemical bonds of a substance D. The energy that is absorbed in a chemical reaction
Answer:
The answer is A The energy released by heat in a chemical reaction
Explanation:
if the energy of an electron goes farther from the nucleus,it's energy ____. plss help me po
Explanation:
As you go farther from the nucleus, electrons at higher levels have more energy, and their energy increases by a fixed, discrete amount. Electrons can jump from a lower to the next higher energy level if they absorb this amount of energy.
Which structure represents nonane?
ОА.
Н
---
H-C-H
т
Н
ОВ.
H H
1 т
н-с-с-Н
1
Н Н
Ос.
Н
H
H H
т
H-C— С
1
H H
H
І
СЕН
1
Н
Н
Н
OD.
Н
1
Н
Н
H
T
Н
Н Н H
І т
H-C— С—
т
Н H Н
І
С
1
Н
1
H
І
Н
Н
С— г-н
1
Н H
Reset
Next
Explanation:
i don't understand what you wrote, but nonane is C9H20
select three of the following compounds that are ionic
Explanation:
Ionic compounds are compounds formed by the bonding of a metal with a non metal.
A. NO2
This is not an ionic compound because N and O are non metals.
B. CaCl2
This is an ionic compound because Ca is a metal and Cl is a non metal.
C. KI
This is an ionic compound because K is a metal and I is a non metal.
D. CO2
This is not an ionic compound because C and O are non metals.
E. H2O
This is not an ionic compound because H and O are non metals.
F. NaCl
This is an ionic compound because Na is a metal and Cl is a non metal.
Identify the reaction type and the products. Al+F2 ->
Answer:
redox and AlF2
Explanation:
X
What period are
the elements
that have an
outer layer O in?
Answer:
carbon
Explanation:
second (n = 2) shell, more specifically its 2s and 2p subshells.
Do you believe humans are responsible for global warming or do you believe this is part of a natural cycle of Earth, like periodic ice ages?
Answer:
If I had to choose I think it would be humans fault.
Explanation:
To think that we are the reason for global warming and everything would make the next person a little insulted but when you think about it a long time ago when there was not many technological advancements there was not complains of global warming or anything until recently. Temperatures are starting to rise and more and more pollution is filling our atmosphere. As it could be true that it might not be entirely our fault as humans I think we took a major part in it.
Hope this helps :)
Hey everyone! Trying to figure out the name for this question. If you could help me, that would be amazing!
help asap select three of the following compounds that are ionic
Answer:
d, e and a
Explanation:
I hope you get it right
Four groups of students were each asked to create table listing two elements and two compounds. Only one group’s table was correct. Which group’s table is correct? [Can someone just please answer]
0.450 gram of Fe contains how many atoms?
Answer:
0.450 grams of Fe contains 4.85*10²¹ atoms
Explanation:
Molar mass is the mass of one mole of a substance, which can be an element or a compound.
In this case, the molar mass of iron Fe is 55.85 g / mole. Then you can apply the following rule of three: if by definition of molar mass 1 mole of Fe contains 55.85 grams, then how many moles will contain 0.450 grams?
[tex]amount of moles of Fe=\frac{0.450 grams*1 mole}{55.85 grams}[/tex]
amount of moles of Fe=8.06*10⁻³ moles
On the other hand, Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.
Then you can apply the following rule of three: if by definition of Avogadro's Number 1 mole of Fe contains 6.023*10²³ atoms, 8.06*10⁻³ moles how many atoms does it contain?
[tex]amount of atoms=\frac{8.06*10^{-3}moles*6.023*10^{23}atoms }{1 mole}[/tex]
amount of atoms= 4.85*10²¹ atoms
0.450 grams of Fe contains 4.85*10²¹ atoms
What do you think is hotter, a blue flame or a red flame, explain why?
Answer:
Blue Flame
Explanation:
Because, flames consists of photons which can be defined as quantum of energies of varying freq. and wavelengths in the electromagnetic spectrum, blue has higher freq than the red colour. Thus, energy is directly proportional to energy which makes the blue flame hotter than the red flame.
a = 10 m/s - 5 m/s
5S
Answer:
what is the formula?
Explanation:
moles in 72 grams of NaHCO3
Answer:
0.857075413470408 moles
Explanation:
hope this helps!
Is the process represented below an example of a physical or a chemical
change?
CO2(s) —» CO2(g)
Atoms of a solid substance are motionless.
A) True
B) False
how much thermal energy does a cup of coffee have
Answer:
a lot that's why it's really hot
PLEASE HELP Name and define the subatomic particles that are part of an atom. How do they differ from each other? How do these differences contribute to the properties of atoms and molecules?
Answer:
Explanation:
The nucleus is made of protons and neutrons. The protons define element and have a positive charge. Neutrons have no charge. Atoms also have a cloud of electrons surrounding the nucleus. Electrons are negatively charged. The transferring/removal of electrons determines the charge.
The atom consists of 3 subatomic particles:
Protons: They are positively charged particles present in the nucleus of an atom.Electrons: They are negatively charged particles present in the orbits around the nucleus of an atom.Neutrons: They are neutral particles present in the nucleus of an atom.An atom can be defined by its properties:
Atomic number: It is equal to the number of protons present in a neutral atom.Mass number: It is equal to the sum of number of protons and number of neutrons.Charge: If an atom does not lose or gain any electron, it is a neutral atom. If it loses electrons, it attains a positive charge and if it gains electrons, it attains a negative charge.Thus, we can conclude that protons define the atomic number, neutrons define mass number and electrons define charge on an atom.
Learn more about subatomic particles here: https://brainly.com/question/13303285
Where is the energy found in sugar molecules?
Answer:
it is stored in the covalent bonds between the atoms
Explanation:
Examine the diagram shown. Which are the correct labels for continental plates 1 and 2?
2
equator
1
1 = Antarctic, 2 = African
1 = Indo-Australian, 2 = Eurasian
1 = North American, 2 = Pacific
1 = South American, 2 = Antarctic
Answer:
Australian and eurasian
Explanation:
Why have rainforest plants adapted to be a different shape and size than desert plants?
A
because rainforest plants are only raised in zoos
B
because in a rainforest environment, adaptation can happen overnight
с
because rainforest plants and desert plants need to store the same amount of
water
because the rainforest environment is different than the desert environment
Answer:
option D is correct answer of this question
option D is correct answer of this questionbecause the rainforest environment is different than the desert environment
option D is correct answer of this questionbecause the rainforest environment is different than the desert environment hope it will help
The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.
Adaption of the rainforest plants to the different shapes and size?
It can be like:
Drip tips - where plants contains leaves with pointy tips.Buttress roots - These contain large roots that have ridges that develop a large surface area. Epiphytes - It lives on the branches of trees high up in the canopy.hence, The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.
learn more about rainforest plants here: https://brainly.com/question/2170925?referrer=searchResults
Help please I have 10 min.
ASAPPPP EASY!!!!!!!!!!
Why do you think that some farmers may not want to adopt organic farming practises?
Answer:
The most important constraint felt in the progress of organic farming is the inability of the government policy making level to take a firm decision to promote organic agriculture. willingness on the part of the farming community.
Explanation:
Answer:
because there expensive
What is the percent composition of oxygen in CsHSO2

Answer:
72.71 %
Explanation:
CO2. % C = 12.01/44.01 = 0.2729= 27.29% (we will divide 0.2729 with 100 to take the percentage). % O = 32.00/44.01 =0.7271 =72.71 %O in CO2.
Balance the following equation..
Answer:
CH4+4Cl2=CCl4+4HCI
Explanation:
It's been a while since i've done one of these, but I believe this is right. Hope this helps!
HELP ASAP!!!
Which of the following is a function of the cell membrane?
Producing energy
Creating new cells
Eliminating of waste
Replacing damaged cells
1. What is a trend in space?
Answer:
zero gravity pogs (very big brain answer)
6. The arrows in the force diagrams represent the various forces acting on a box. The box starts out at rest.
Which diagrams match this description- Starts moving to the right?
A
B.
C.
D.
8)
How many molecules are there in 230 grams of CoCl2?
Answer:
1.07x10^24
Explanation:
thats the answer
Therefore, the number of mole will be 1.065 × [tex]10^{24}[/tex].
What is mole?
A mole is the quantity of a substance containing 6.023 x [tex]10^{23}[/tex] particles of that substance. The mole is really the SI unit for a substance's quantity.
It is given that, mass of 230 gram of CoCl2.
Moles = mass / molar mass
Put the value of given data in mole formula.
Moles = 230 / 129.8
Moles = 1.77
It is known that, 1 mole = 6.02 × [tex]10^{23}[/tex] molecule.
Hence, 177 moles = 6.02 × [tex]10^{23}[/tex] × 1.77 = 10.65 × [tex]10^{23}[/tex] .
Therefore, the number of mole will be 1.065 × [tex]10^{24}[/tex].
To know more about mole.
https://brainly.com/question/19922822
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6.
A crystal of the purple compound potassium manganate (VII) is placed at the bottom
of a beaker of water and the beaker left until there
is no further change. What will be
observed?
A a uniformly purple solution.
B
a purple layer below a colourless layer.
С a colourless layer below a purple layer.
D a deep purple layer below a pale purple layer.
Sec 3/KPT and SMS/2021
Page 2 of 3
Answer:
I don't know
Explanation:
sorry i just need point to ask so i have comment