Answer:
I Think it might be A! I hope I am right!
Which statement about the carbon cycle is most true?
A. Energy is destroyed when organic matter decays.
B. The total mass of carbon on Earth is always increasing.
C. Carbon is lost from the cycle when it enters the atmosphere.
D. Carbon changes form, but the total amount on Earth remains the same
Answer:
its a.
Explanation:
An element ceases to be that element if the particle it loses or gains is a neutron.
True or false
Answer:
False
Explanation:
An element is named according to the number of protons in the nucleus. If it gains or loses a neutron, it becomes a different isotope of the same element.
The given statement is false.
Answer:
FALSEExplanation:
#CARRYONLEARNING
What is the mass of 3.4 moles of NaCl?
Answer: 140.4 grams. One mole would be 58.5 grams, or 23 (the atomic mass of sodium) + 35.5 (the atomic mass of chlorine)
Explanation:
Answer:
3.4 * 58.5 = 198. 9 grams
Which of these most likely indicates that a chemical change has happened? A. Spoiled milk gives off a strong oder. B. Candle wax melts when it is heated. O C. Solid ice forms on a lake in winter. D. A guitar string vibrates when it is plucked.
Answer:
B- Candle wax melts when it is heated.
SOMEONE HELP WITH THAT THING PLSSS( I also didn’t know what to put as the topic)
Answer:
hope this helps
Explanation:
Water was on earth with the dinosaurs and almost at the very start.
Water starts anywhere from clouds to ponds
I choose ponds, water evaporates from the sun and moves its way through the air being collected into clouds in the atmosphere, clouds are evaporated water molecules, then the water combines to form rain wich then end up on a hill and travel back to a water source or goes into the ground and makes groundwater and if there is enough rain overtime will form a pond.
Can someone help me?
Answer:
b
Explanation:
I don't know that is what the outcome is I think
HELPP ILL GUVE YOU LOTS OF POINTS EVERYTHING U WANT I REALLY NEED HELP
Answer:
hi again
I : Television. Satellites send television signals directly to homes
II : gravity
Answer:
1) I would say television and streaming channels. 2) gravity
Explanation:
Multiplication & Division
Language of Chemistry
llus
Perform the following
mathematical operation, and
report the answer to the correct
number of significant figures.
0.008 : 51.3
[? ? ] x 100)
Enter
Answer:
0.008 ÷ 51.3 = 0.00015594541910331380.00015594541910331382Round 0.0001559454191033138 → 0.0002 (Sig Figs: 1)
What is the definition of an Arrhenius acid?
Answer:
increases [H+]
Explanation:
A 2.5l container has a gas of 4.6atm. If the volume is decreased to 1.6l. What will be the new pressure inside the container
Answer:
Just add and multiply after divding and lol
Explanation: add then add
How many moles of gas would be present in a gas trapped within a 37.0 L vessel at 80.00C at a pressure of 2.50 atm
go here is the answer key
http://msschmidly.weebly.com/uploads/2/6/2/0/26201624/gases_review___calculations.pdf
According to ideal gas equation, there are 271472.7 moles of gas present in a gas trapped within a 37.0 L vessel at 80.0°C at a pressure of 2.50 atm.
What is mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons .Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Substitution of values in ideal gas equation gives,n= 2.5×37/8.314×353=271472.7 moles.
Learn more about moles,here:
https://brainly.com/question/26416088
#SPJ3
questions.
1) The degree of polarity of a bond is indicated by
A. Ionization energy difference
B. The shape of the molecule
C. Electronegativity difference
D. The partial charges of the molecule
2) When electrons are shared unequally, chemists characterize
Answer:
d
Explanation:
the partial charges of the molecule
Atomic masses of element
Hydrogen and carbon
Answer:
Atomic mass of Hydrogen is 1.00784 u
Atomic mass of Carbon is 12.0107 u
Explanation:
What is the name of the test used to find out the gas produced when calcium reacts with sulfuric acid? *
1.Lime Water
2.lighted splint
3.litmus paper
4.glowing splint
Answer:
1
Explanation:
calcium react with sulphuric acid to produce carbon dioxide which turns lime water milky
12.
An object with a mass of 3 kg has a momentum of 75 kg•m/s. What is the velocity?
Answer:
the velocity is 25 m/s
Explanation:
The computation of the velocity is shown below:
As we know that
Magnitude of Momentum = (mass) × (speed)
75 kg. m/s = 3 kg × speed
So, the speed is
= 75 ÷ 3
= 25 m/s
hence, the velocity is 25 m/s
If the Temperature exerted on a sample of gas is increased from 273K to 410K, and the initial pressure is 1.3317 atm what is the final pressure in atm?
Answer: 2.00 atm
Explanation:
P1/T1 = P2/T2
1.3317/273 = P2/410
P2 = 2.00 atm
pls pls pls help im begging
Answer:
1. An incline plane is a flat plan put at a positive angle with the ground (assuming the ground is horizontal)
2. Work equals force times distance. And since the hypotenuse of a triangle (the ramp) is longer than the opposite side (equivalent to lifting an object vertically), the increased distance decreases the force needed to do a certain amount of work.
3. We usually use incline planes to elevate large objects. Since it takes less force to move certain things up inclines rather than picking them up, it is much simpler to move an object up an incline.
4. You could decrease the force by making the plane's angle with the ground smaller.
5. I don't know; I wasn't in your class :)
6. Ramps, wheelchair entrances, inclined rooves etc.
7. No. A plane has to be relatively flat; therefore stairs are neither a plane, nor an inclined plane.
For the Balanced Reaction: 3 Mg + Fe2O3 → 3 MgO + 2 Fe
what is the mole ratio needed to calculate the moles of iron, if you are given the moles of magnesium?
Answer:
3 mol MgO : 2 mol Fe
Explanation:
Can someone please fill in the blanks?
Answer:
g3gegsgehshhwwjwuwuwu2euyeeyeyyy
Answer:
helium formula He
Ammonia formula NH3
methane formula CH₄
chlorine formula Cl-
Explanation:
How can you model the movement of a primary wave?
Answer:
P-waves (primary or compressional waves) are longitudinal or compression waves, able to move through solids, liquids, and gases at speeds ranging between 300-5,000 metres per second. As they travel through rock, they move particles back and forth in the same direction that the wave is moving
Explanation:
increase food supplies in an ecosystem decrease competition because the competing organsims would
what is the formation of the solar system?
Answer:
Mercury
Mars
Venus
Earth
Neptune
Uranus
Saturn
Jupiter
Explanation:
At what temperature would a 1.30 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 ∘C/m .
Answer:
-4.59°C
Explanation:
Let's see the formula for freezing point depression.
ΔT = Kf . m . i
ΔT = Freezing T° of pure solvent - Freezing T° of solution
Kf = Freezing constant. For water if 1.86°C/m
m = molality (moles of solute in 1kg of solvent)
i = Van't Hoff factor.
0°C - Freezing T° of solution = 1.86°C /m . 1.30m . 1.9
Freezing T° of solution = - (1.86°C /m . 1.30m . 1.9)
Freezing T° of solution = - (1.86°C/m . 1.30m . 1.9) → -4.59°C
NaCl → Na⁺ + Cl⁻
Why does a Lewis structure of a covalent molecule show only the valence electrons?
Answer:
Only the valence shell are shown in the Lewis electron dot structures because, the chemical reactivity of an atom of an element is determined by the valence electrons of the atom and not by all the electrons of the atom including the inner electrons.
Explanation:
Lewis electron dot structures are structures that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
In the Lewis symbol for an atom, the chemical symbol of the element is written, and the valence electrons of the atom are represented as dots surrounding it. Only the electrons in the valence shell are shown using the Lewis electron dot structures.
Lewis structures for molecules show each atom and its position in the structure of the molecule using its chemical symbol. Dots or lines are drawn between atoms to show the electrons that are involved in the chemical bonding between the atoms in the molecule. Valence electrons in each atom that are not involved in bonding known as lone pairs, are represented as pairs of dots, and are placed next to each atom bearing the electron.
Electrons that are not in the valence level are not shown in the Lewis electron dot structures . This is because, the chemical reactivity of an atom of an element is determined by the valence electrons of the atom and not all the electrons of the atom including the inner electrons.
Which is not a type of mass movement
Answer:
options?
Explanation:
Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of the Moon. How should he position them to show a New Moon?
With Earth between the Moon and the Sun.
O With the Moon between Earth and the Sun.
With the Sun between Earth and the Moon
With the Moon perpendicular to Earth and the Sun.
Answer: With Earth between the Moon and the Sun.
Explanation: Think about how we the order of all planet including different moons.
It’s actually B
Explanation:
If 100 ml of a 0.5 M HCI Solution is diluted with water to 1000ml, what is the new concetration?
Answer:
[tex]0.05\ \text{M HCl}[/tex]
Explanation:
[tex]V_1[/tex] = Initial volume = 100 mL
[tex]V_2[/tex] = Final volume = 1000 mL
[tex]M_1[/tex] = Initial concentration = 0.5 M
[tex]M_2[/tex] = Final concentration
We have the relation
[tex]\dfrac{M_1}{M_2}=\dfrac{V_2}{V_1}\\\Rightarrow M_2=M_1\dfrac{V_1}{V_2}\\\Rightarrow M_2=0.5\times \dfrac{100}{1000}\\\Rightarrow M_2=0.05\ \text{M HCl}[/tex]
The new concentration is [tex]0.05\ \text{M HCl}[/tex].
PLSSS HELP MEEE!! I don’t get this anyone help me!!
Answer:
B
Explanation:
The other answers dont make any sense.
what is the electron configuration of Cd^2+
Answer:
(Kr)4d^10
Explanation:
Answer:
[Kr]. 4d10
Explanation:
The ground state electron configuration of ground state gaseous neutral cadmium is [Kr]. 4d10.
List and Describe the two groups of clastic sedimentary rock.
Answer:
Clastic sedimentary rocks are formed from rock fragments or clasts; chemical sedimentary rocks precipitate from fluids, and biochemical sedimentary rocks form as precipitation from living organisms.
Sedimentary rock is classified into two groups based on how they form. They are clastic and chemical. Clastic sedimentary rock is formed as bits of weathered rock become cemented together. Because all kinds of rock are subject to weathering many different minerals can make up this group of rocks.