Answer:
artic is correct please give brainliest please??
How many atoms are in 14 moles of I? Watch your significant figures.
A. 8.4 x 10^24 atoms of l
B. 8.43 x 10^24 moles of l
C. 8.4 x 10^23 atoms of I
D. 8.43 atoms of l
Answer:
may be A, 8.43 × 10........ atoms of l
The process that fuels a star is BEST described as
A)
helium molecules being burned by fire.
B)
fusion of helium molecules to form hydrogen.
C)fission of helium molecules to form hydrogen.
D)
hydrogen molecules being forced together by gravity.
Answer:d
Explanation:
d
Hydrogen molecules being forced together by gravity is what best describes how a star is fuelled.
What is Gravity?This is defined as the the universal force of attraction acting between all matter.
Hydrogen molecules is forced together by gravity which is how stars are fuelled in space thereby making option D the most appropriate choice.
Read more about Stars here https://brainly.com/question/3357478
Bases and acids are _
A. Mixtures
B. Gases
C. opposites
D. The same
Answer:
opposite
Explanation:
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Compounds are ________ substances.
A.)neutral
B.)charged
C.)ionized
D.)non-neutral
Answer:
A.)neutral
because their ions have equal and opposite charges whose resultant charge is zero
i did not mean to publish this ;-;
Answer:
dang
Explanation:
Answer:
hi I guess I got free point s
brainliest and a free hug :)
The mass in a chemical reaction is found in
the energy produced by the reaction
the explosion produced by the chemical reaction
the atoms involved in the chemical reaction
the bonds involved in the chemical reaction
Answer:
C: The atoms involved in the chemical reaction
Explanation:
In a chemical reaction, when we balance it up, the number of moles or atoms on the left side must equal that on the right hand side. And thus, the mass is found in the atoms involved in such chemical reaction.
Which environment is BEST for an organism that sleeps during the day and digs holes in the ground for shelter?
A
What can be used to measure the ph of a substance
How is energy transferred in a chemical reaction
Answer:
Answer
Explanation:
All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy. The law of conservation of energy states that matter cannot be created or destroyed.
What is the molecular geometry of a molecule with 4 outer atoms and 1 lone pair on the central atom?
Answer:
See explanation
Explanation:
The valence shell electron pair repulsion theory states that; the number of electron pairs present on the valence shell of the central atom in a molecule is the final determinant of shape of the molecule.
Based on this theory, the electron domain geometry of a molecule having 4 outer atoms and 1 lone pairs on the central atom should be based on a trigonal bipyramid. The molecular geometry of this molecule is see saw with a bond angle of <90 degrees(axial) and <120 degrees(equatorial).
How many grams of H2O is created from 60 grams of O2?
[2 H2 + O2 —> 2 H2O]
Answer:
67.5 gm H2O
Explanation:
2 H2 = 4 gm
O2 = 32 gm
2 H20 = 36 gm
so 32 gm O2 results in 36 gm H20
32/36 = 60/x x = 67.5 gm
Lysol Power Toilet Bowl Cleaner contains 9.5% hydrochloric acid. Explain why this would be necessary to clean toilet bowls that have white or rust-coloured deposits
Answer:
The acid will absolutely remove the hard water deposits that are trapping the stains. The longer it soaks, the less you have to scrub. It works for hard water stains, limescale, and rust!
Explanation:
hope this helped you out.
What is the difference between the coyotes and the gray squirrel population size in year 11?
Answer:
https://www.northallegheny.org/cms/lib/PA01001119/Centricity/Domain/1330/Concept8ecology.pdf is the cite that i got the answers for that form hop it helps
Explanation:
Answer:
As the squirrel population increases their resources become more scarce, putting a limit on population size
Explanation:
what happens during rusting
A. iron oxide decomposes to iron releasing oxygen
B. iron and oxygen react to form iron oxide
C. iron combusts in oxygen
D. water reacts with iron releasing oxygen
Answer: B
Explanation: I had an even lengthier explanation but Brainly is being a butthead. But I got it right on my test for those who want to know.
Rusting is the process of corroding metallic parts by the action of water and air. Iron forms iron oxide by reacting with water or air.
What is rusting ?Rusting is the process of corrosion of metallic parts by forming a red oxide film on the surface of the metals containing Fe. Metals on reacting with water or air destroys by the action of oxygen.
Mostly iron and copper undergo corrosion. Corrosion is an electrochemical process by which the metal part undergo reduction and deposits in cathode.
Iron easily undergo corrosion forming rust or the red colored iron oxide. Iron react with water through air or water and forms iron oxide on the metal surface which eventually cover the whole metal.
Find more on rusting:
https://brainly.com/question/18376414
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how many neurons are in lithium
Based on the kinetic theory, which statement is true?
Matter is made up of only charged particles.
The particles of matter are stationary.
The particles of matter have zero kinetic energy.
Matter is composed of very small particles.
Answer:Matter is made up of only charged particles.
Explanation: Took the test
When a computer or end-user uses a made-up IP address as a source address is called?
Answer:
That would be a VPN.
Explanation:
Answer:
Would be a dependant, and the IP address is the host address
A substance is tested and has a pH of 8.4. What would you classify it as?
A. A strong acid
B. A strong base
C. A weak acid
D. A weak base
Answer:
D
Explanation:
7 is neutral on a PH scale. Anything less is an acid and anything higher is a base. A Ph scale goes from 1-13. 8.4-7=1.4. This is a small change so it is considered a weak base. Can I get brainliest?
Answer:
D.A weak base
Explanation:
The pH of a weak base falls somewhere between 7 and 10. Like weak acids, weak bases do not undergo complete dissociation; instead, their ionization is a two-way reaction with a definite equilibrium point. While strong bases release hydroxide ions via dissociation, weak bases generate hydroxide ions by reacting with water. Ammonia (NH3) and methylamine (CH3NH2) are examples of weak bases.
You’re going on a plane from Alaska to Florida and you’re taking your bike. It’s the middle of the winter. You fill up your tires before you leave to a pressure of 4.72 atm on a day that is -3.50°C. When you arrive in FL at 42°C, you check the pressure in your tires before you ride and find the pressure to be:
Answer:
5.52atm
Explanation:
Using the pressure law formula:
P1/T1 = P2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the question, the following information were provided;
P1 = 4.72 atm
P2 = ?
T1 = -3.50°C = -3.50 + 273 = 269.5K
T2 = 42°C = 42 + 273 = 315K
Using P1/T1 = P2/T2
4.72/269.5 = P2/315
CROSS MULTIPLY
4.72 × 315 = 269.5 × P2
1,486.8 = 269.5P2
P2 = 1,486.8 ÷ 269.5
P2 = 5.52atm
Which type of fat is a solid at room temperature and does not have double bonds between carbon
atoms?
Triglycerides are made from an ester of glycerol and
are important building blocks of fats.
DONE
Answer:
Saturated Fats
Explanation:
Saturated fats are all of the above.
Also, Saturated fat is very unhealthy. Only consume it in small amounts.
Answer:
Saturated Fat
Fatty Acid
Fatty Acid
Explanation:
name this compound
please helppp thank you!!!
Answer:
Sodium sulfide is the chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na 2 S and its hydrates emit hydrogen sulfide , which smells like rotten eggs.
I'm not sure if it's right but it's a guess because of the 2Na.
That is sodium carbonate, Na₂CO₃.
Nuclear Equations HELP!!! 100PTS
A nuclear equation is one, where the sum of the mass numbers and the sum of the atomic numbers balance on either side of an equation. Nuclear equation problems will often be given such that one particle is missing.
1.How many grams of zinc Zn and oxygen O2 will be needed to form 324 grams of ZnO after the reaction?
Answer: pretty sure its 0.214 moles * 40.3g/mole = 8.6g (2 sig figs) of MgO, and
0.035 moles * 40.3g/mole = 1.4g of MgO
Explanation:
How many moles in 53.4 grams of CCl4.
Generic formular: Mole = mass/molar mass
molar mass of CCl4 = 153.811 g/mol
Mole of CCL4 = 53.4/153.811 = 0.347 mol
A sample of nitrogen gas occupies 9.20 L at 21degrees and 0.999m the pressure is decreased to 0.802 am at constant temperature, what is the
newly occupied volume?
Answer: The newly occupied volume is 11.46 L
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex] (At constant temperature and number of moles)
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 0.999 atm
[tex]P_2[/tex] = final pressure of gas = 0.802 atm
[tex]V_1[/tex] = initial volume of gas = [tex]9.20 L[/tex]
[tex]V_2[/tex] = final volume of gas = ?
[tex]0.999\times 9.20=0.802\times V_2[/tex]
[tex]V_2=11.46L[/tex]
Therefore, the newly occupied volume is 11.46 L
A truck at the top of the hill has higher gravitational potential energy then when it is at the bottom of the hill. Why does it roll downhill?
1. To increase its kinetic energy
2. To lower its potential energy
3. To increase the entropy of the universe
4. To decrease the entropy of the universe
Answer:
An object that goes up a hill will be going at a slower speed at the top than at the bottom of the hill. This is because moving up or down a hill changes one kind of energy into another. Objects at the bottom of the hill have more kinetic energy, which means they are moving faster.
Explanation:
At 40 degrees Celsius , 100 grams of NaClO3 is added to 100 grams of water. The solution would be ..
a.) saturated
b.)unsaturated
c.) saturated with excess
d.) supersaturated.
what is a mole? not the animal definition lm.ao
Answer: Well, a mole is really the same thing. For a chemist, a mole conjures up the number 6.02 times 10 to the 23rd, not a fuzzy little animal. The only difference is that the other quantities are more familiar to us. Lol
Explanation:
Answer:
basically is a unit measurement for the amount of substance in the unit syystem, some examples are ions, atoms molecules, or electrons.
Explanation:
What color is phenolphthalein in a solution that has a pH of 10?
(1.7m - 2) + (2m – 4)
Answer: 3.7 m − 6
Explanation: Simplify the expression.
brainliest or a thank you pls :)) <3
