Explanation:
200 / 4.18 = 47.84 calories.
What are atoms? What do we use it for
Answer:
atoms are everything and they are use to create anything and everything
Answer:
Atoms are composed of subatomic particles that are the building blocks of life
Which of the following statements is not a main point of Dalton's atomic theory?
of
Select one:
a. Atoms are indestructible.
b. Atoms are made up of smaller particles.
C. All matter is made up of atoms.
d. All atoms of one element are exactly alike, but they are different from atoms of other elements.
Answer:
B is not main point Dalton addressed
What forces hold molecular solids together?
A. Intermolecular forces
B. Forces from ionic bonds
C. Forces from covalent bonds
D. Forces from metallic bonds
Answer:
intermolecular forces
Answer:
A. Intermolecular forces
What is the chemical symbol for salt?
Answer: chemical formula of table salt is NaCl
Explanation:
Gravity is a force that every mass exerts on every other mass. When you jump up in the air, not only does the Earth
exert a gravitational force on you, but you also exert a gravitational force on the Earth. You, of course, fall back down to
the Earth. Which of the following explains why the Earth is not moving toward you when you jump up in the air?
A. Earth exerts a gravitational force on itself.
B. You don't weigh enough to affect Earth's surface.
C. Your mass is very small compared to Earth's mass.
D. Earth's fixed orbit around the Sun keeps it from moving
Answer:
Brainliest A and I want brainliest please
Explanation:
That pull is gravity at work. Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but the Gravity or gravitational forces are forces of attraction. We're not talking about finding someone really cute and adorable. It's like the Earth pulling on you and keeping you on the ground. That pull is gravity at work.
Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but that force isn't very strong, since people aren't very massive. When you look at really large masses, like the Earth and Moon, the gravitational pull becomes very impressive. The gravitational force between the Earth and the molecules of gas in the atmosphere is strong enough to hold the atmosphere close to our surface. Smaller planets, that have less mass, may not be able to hold an atmosphere.at force isn't very strong, since people aren't very massive.
Obviously, gravity is very important on Earth. The Sun's gravitational pull keeps our planet orbiting the Sun. The motion of the Moon is affected by the gravity of the Sun AND the Earth. The Moon's gravity pulls on the Earth and makes the tides rise and fall every day. As the Moon passes over the ocean, there is a swell in the sea level. As the Earth rotates, the Moon passes over new parts of the Earth, causing the swell to move also. The tides are independent of the phase of the moon. The moon has the same amount of pull whether there is a full or new moon. It would still be in the same basic place.
Compared to 3.011 × 10²³ atoms of Na, 1.0 mole of Carbon
A. has the same number of atoms
B. has twice as many atoms
C. not enough information
D. has half as many atoms
Compared to 1.0 mole of H₂S (molar mass 334 g/mol), 1.0 mole of NH₃ (molar mass 17g/mol)
A. has half the number of molecules
B. not enough information
C. has twice the number of molecules
D. has the same number of molecules
Thank you!
1. B. has twice as many atoms
2. D. has the same number of molecules
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
1.
3.011 × 10²³ atoms of Na, 1.0 mole of Carbon
1 mole Carbon = 6.02.10²³ atoms, so 1 mole of Carbon B. has twice as many atoms of Na
2.
1.0 mole of H₂S (molar mass 334 g/mol), 1.0 mole of NH₃ (molar mass 17g/mol)
Both have the same number of moles, so they have the same number of molecules
1.0 mole of NH₃ D. has the same number of molecules as 1.0 mole of H₂S
2. Describe how baking cake is an example of irriversible change.
Answer:
Baking a cake is a chemical and irreversible change, because once the raw materials are chemically converted during baking, one cannot recover the raw materials from the cake
what should we use in soap making process:-
a) potassium hydroxide
b) sodium hydroxide (lye)
Explain why it should be used
Answer:
Well either of them can be used but I would say B). Sodium hydroxide
Explanation:
Potassium Hydroxide is a type of lye specifically used to make liquid soap. It is also known as potash, lye or even KOH. This is the chemical that induces saponification of the fats and oils to create liquid soap. ... Our lye calculator makes this easy and allows you to select liquid soap as an option.
Sodium hydroxide, with the formula NaOH, is usually used in products as a pH adjuster. It's also used in soap-making to turn fats and oils into soap. You can find sodium hydroxide (also called caustic soda or lye) in its pure form in the cleaning aisle, since it's also really handy for clearing up clogged drains.
Hope this helps! Please consider marking brainliest! I hope you have an amazing day. Always remember, your smart and you got this! -Alycia :)
the ion SO-² ia given : find the protons electrons and neurons
Answer:
dude did you not pay attention in science the answer is 18- n 20- p 18-e
Explanation:
Gene therapy has been used to treat and cure cystic fibrosis. Cystic fibrosis is caused by a
in a single gene.
Answer:
I believe it is mutation.
Explanation:
When thermal
energy of a system increases, the particles move ____.The motion of the particles can move parts of the system. When something causes an object to ___ it has done work on it.
a. slower;move
b. faster;move
c.faster;heat up
d.slower; heat up
If you have 10.0 g of hydrogen and 5.0 g of oxygen, what mass of the excess reagent remains after the completion of the reaction?
mass Hydrogen=9.376 g
Further explanationReaction
2H₂+O₂⇒2H₂O
mass H₂ = 10 g
mol H₂(MW=2 g/mol) :
10 : 2 = 5
mass O₂=5 g
mol O₂(MW=32 g/mol) :
5 : 32 = 0.156
O₂ limiting reactant
mol H₂: mol O₂ = 2: 1, so mol H₂ :
2 x 0.156 = 0.312
mol H₂ :
5 - 0.132 =4.688
mass of H₂ :
4.688 x 2 =9.376 g
POINTS AND BRAINIEST ANSWER!!!!
How many valence electrons does oxygen have after bonding?
How many valence electrons does hydrogen have after bonding?
Answer:
hydrgen = i think it is 4
oxygen = i think it is 3
Explanation:
HELPPPPPP
In a water molecule, oxygen attracts electrons more strongly than the hydrogens because an oxygen atom has ...?
- a higher EN
- lower EN
- higher ionization energy
Answer:
a higher electronegativity
Explanation:
In fact, in chemistry Nitrogen, Oxygen and Fluorine are the most electronegative element
Lucy knew that a tea cup of water has a boiling point of 100˚ Celsius. She currently has a 5 liter soup pan filled with water. At what temperature will the 2.5 two liters of water boil? A. 500˚ Celsius B. 0˚ Celsius C. 105˚ Celsius D. 100˚ Celsius
30 points!!
What is the mass of a 10 gram sample of potassium-42 that will remain unchanged after 124 hours?
Explanation:
hope this helps you
Mark my answer as brainalist
Which of the following gives a plant the carbon it needs to make glucose?
Water
Light Energy
Carbon Dioxide
Ouction 2
Answer:
light babsbabsbab
Explanation:
abbdbabsbabba
how did the masses of objects affect the strength of gravity
Answer:
the strength of gravitational force between two objects depends on two factors,mass and distance. the force of gravity the masses exert on each other. if one of the masses is doubled, the Force of gravity between the object is doubled. increases the force of gravity decreases.
How many formula units is 213 g of PbCl2?
a
1.28 x 1026
b
4.61 x 1023
G
7.86 x 1023
d.
15.72 1024
Answer:
4.61 x 10^23
Explanation: Convert 213g of PbCl2 to mol, which is 0.7658950184462004, multiply 0.765 with 6.022 x 10^23.
1 mole is equal to 6.023 × 10 ²³ molecules. 4.61 x 10^23 formula units is 213 g of PbCl2.
What do you mean by mole ?The term mole is defined as the amount of substance of a system which contains as many elementary entities.
One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.
The mole concept can be used to convert between mass and number of particles.
Convert 213g of PbCl2 to mol,
1 mole is equal to the 6.023 × 10 ²³ molecules
1 mole of PbCl2 is equal to the 6.023 × 10 ²³ molecules
which is 0.7658950184462004, multiply 0.765 with 6.022 x 10^23.
= 0.765 × 6.022 x 10^23
= 4.61 x 10^23
Thus, 4.61 x 10^23 formula units is 213 g of PbCl2.
To learn more about the mole, follow the link;
https://brainly.com/question/26416088
#SPJ2
what happens when the temperature of a solid reaches its melting point
Answer:
it melts
Explanation:
Why do scientists continue to investigate certain topics like the atom?
What reacts with carbonates to produce carbon dioxide ?
A. Litmus paper
B. Bases
C. Acids
D. Metals
Answer:
c
Explanation:
hope it helps :)
Answer:
C. Acids
Explanation:
Trust me.
Using data from seismic waves, geologists have learned that Earth’s interior is made up of several
a.
continents.
b.
layers.
c.
ridges.
d.
trenches.
Answer:
b
Explanation:
If a seed grows well in a very salty environment then that seed has a high salt tolerance.
O True
O False
Which elements are necessary to accomplish work?
force, cause, displacement
force, cause, energy
force, energy, displacement
energy, cause, displacement
The answer to this question is A "force, cause, displacement"
Hope that helps!
Air is made up of different gases such as oxygen nitrogen and carbon dioxide
Which of the following statements is true about nuclear fusion? (4 points)
It occurs in the sun.
A heavy atom is split.
It can be controlled easily.
An electron is lost by the atom.
Let's understand Nuclear fusion first:
Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles.In the core of the Sun, hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.Nuclear fusion reactions are difficult to control.Fusion does not produce nuclear waste, only the core of the reactor remains radioactive and only for 100 years.Learn more:
brainly.com/question/25909835
What is the tendency for an atom to attract electrons when chemically
bonded to another atom?
Answer:
Electronegativity
Explanation:
Answer:
Electronegativity
Explanation:
Edge 2021
why is tate langdon from ahs so hot
Answer:
hes actually kinda hot tho
Explanation:
Answer:
he's a literal daddy
Explanation:
his parents
PLS HELP ANYONE PLS BEGGING AT THIS POINT
What is the mass of 12 moles of tin?
Select one:
O a.118.719
O b. 1409
O c.0.109
O d. 1, 400g
Answer: 12 moles of tin is 1,400 or D
It might also be C
Explanation:one mole of tin is 118.71 so that times 12 is equal 1,424 . Round 1,424 and it is 1,400