Please help me. I really don’t understand this

Answer:

Cellular respiration is the process where cells break down glucose and then they convert it into energy. Cellular respiration is important because without cellular respiration there would not be any energy and without energy there would not be any food.

The amount of water that we get from the large balloon is greater than the amount of water that we get from the small balloon.

We know that water is composed of hydrogen and oxygen. Let us recall that the ratio of the water and the oxygen that form the water molecule is fixed irrespective of the volume of the water that we use for the reaction.

If we compare if you ignited a very large balloon of hydrogen and oxygen instead of a very small balloon filled with the same reactants, we would notice that the amount of water that is formed from the large balloon of hydrogen and oxygen is greater than that produced from a very small balloon filled with the same reactants.

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The mass of the ice to the cup increases The total energy in the cup will - The mass remains unchanged.

What is mass?
The total amount of matter in a physical body is defined as its mass. In the presence of a net force, it also serves as a gauge for the body's inertia, or resistance to acceleration (change in velocity). The gravitational pull of an object on other bodies is also influenced by its mass. The kilogramme is the SI's primary mass unit (kg). Even though weight is frequently measured with a spring scale rather than a balancing scale and directly compared to known masses, mass and weight are not the same thing in physics. Because of the lower gravity on the Moon, an object would weigh less while maintaining the same mass as it does on Earth.

The latent heat of fusion is absorbed by the mass. This is required for phase changes.

Despite absorbing heat from the environment, the temperature stays the same as long as there is still some ice present. The warmth that is absorbed is used as latent heat rather than sensible heat.

The mass remains unchanged.

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Incomplete question but using assumed values, the volume of m potassium dichromate solution that contains potassium dichromate is 9.1L

To calculate the volume of solution, we use the equation for molarity of solution:

Molarity of solution = mass of solute/molar mass of solute*volume of solution (in liter)

Where assumed values are:

Molarity of solution = 0.15 M

Given mass of potassium dichromate = 400. g

Molar mass of potassium dichromate = 294.15 g/mol

Volume solution in liter = x

i.e.

0.15 = 400/294.15*x

Volume of solution in liter = 400/294.15*0.15

Volume of solution in liter = 400/44.12

Volume of solution in liter = 9.06

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Answer:

3FeSO4 + 2K3PO4 → Fe3(PO4)2 + 3K2SO4

Explanation:

The molecular formula of the given is 0.519.

To calculate the molecular formula we need a simple formula,

molecular formula = divide the molecular mass / empirical formula

So, the known are

molecular mass = 62 g/mol

empirical formula = CH₃O

C = 38. 7%

H = 9. 7%

O =  51. 6%

empirical formula = 38. 7% + (9. 7% x 3) + 51. 6%

empirical formula = 119.4

Now, putting the values in formula

molecular formula = molecular mass / empirical formula

molecular formula = 62 g/mol / 119.4

molecular formula = 0.519

Hence, the molecular formula is 0.519.

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The no. of moles of steam present in the cooker is 0.402 mol.

The ratio between a substance's given mass in a chemical reaction and the mass of one mole of that material is used to determine how many moles there are of that substance. Any material has an atomic mass of one mole, or 6.023 x [tex]10^{23}[/tex], according to Avogadro. Additionally, No. of moles is employed to represent concentration measurements like mole per liter and molecular weight.

Given:

Pressure, P = 3.20atm

Volume, V = 4L

Temperature, T = 115℃ = 115 + 273 = 388K

To find:

No. of moles, n = ?

Formula:

PV = nRT

Calculations:

n = 3.20 x 4 / 0.082 x 388

n = 0.402 mol

Result:

0.402 moles of steam is present in the cooker.

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When a screen is used to easily separate substances, what physical properties are being used then the size are used

A physical property is a characteristic of matter that is not associated with a change in its chemical composition and similar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity and the physical property that is in use when substances are separated using a screen is differences in particle size of the substances and this is the separation method

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Answer:

d

Explanation:

Based on the percentage mass of magnesium oxide in the sample, the mass of Magnesium oxide in the sample is 0.42 g.

Magnesium is a metallic element with an atomic number of 12.

Magnesium is an important mineral that is used as a supplement s well as in drugs such as milk of magnesia.

Considering the given magnesium supplement:

1.02 g magnesium supplement contains 25.0% Mg by mass.

Magnesium is present in the supplement as magnesium oxide, MgO.

The molar mass of magnesium oxide, MgO = 40.30 g/mol

Molar mass of magnesium = 24.0 g

Percentage mass of Magnesium oxide in the sample = 40.3 / 24 * 25

Percentage mass of Magnesium oxide in the sample = 42%

Mass of Magnesium oxide in the sample = 42 % * 1.02

Mass of Magnesium oxide in the sample = 0.42 g

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The correct answer is option C: natural gas

The ingredient which is important in making plastics is natural gas.

Plastics are the refined form of natural gas, plant liquids, and crude oils.

Plastics can be manufactured in two ways: synthetic and biobased.

Synthetic plastics come from raw materials including natural gas, crude oil, and coal.

On the contrary, biobased plastics are manufactured from renewable materials such as starch, vegetable fats, oils, and carbohydrates.

However, the most common method of plastic manufacturing is the transformation of raw materials into refined propane and ethane.

In the next step, ethane and propane undergo cracking which transforms them into ethylene and propylene which are the building blocks of long chains of polymers.

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Answer:it's C

Explanation:

I just did it on Edge you're welcome Happy early Halloween you're beautiful and have a nice day. :)

Lithium Atom, Fluorine common ion, Magnesium Common ion, Oxide common ion are the ones that are larger in each of the choices as given.

Positively charged ions are known as cations. Negatively charged ions are further referred to as anions. A charged atom or molecule can be referred to as an ion.

A balanced atom will change into a positively charged cation if one or more of its electrons are lost. A balanced atom will change into a negatively charged anion if it gains one or more electrons.

In the formula for an ionic compound, the positive ion, known as a cation, is listed first, followed by the negative ion, known as an anion. The net charge or neutral electrical charge in a balanced formula is zero. A cation can be either positive or negative.

An anion contains more protons than electrons, while a cation has a net positive electrical charge. An anion has a greater number of electrons than protons and a net negative electrical charge.

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The amount of copper that would be deposited on the cathode during the process is 47.75 g.

The amount of copper (II) deposited is calculated as follows;

CuSO² ⇄ Cu²⁺  +  SO₄²⁻

Cu²⁺  +  2e⁻  → Cu

.

From the oxidation reaction above, we can infer that,

2F -----------> 64 g of copper (Cu)

where;

The quantity of charge passed through the solution of  copper (II) sulfate for four hours is calculated as follows;

Q = It

where;

Q = (5 A) x (4 hrs x 3600 s/hr)

Q = (5 A) x (14,400 s)

Q = 72,000 C

The amount of copper that will be deposited by this quantity of charge is calculated as follows;

96500 C --------> 64 g

72,000 C ---------> ?

= (72,000 X 64) / 96500

= 47.75 g

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54.418 kJ amount of heat required to completely melt the200gm of H2O sample at its melting point.

Mass of water = 200 g

Initial temperature of the water = 0°C

Final  temperature of the water = 65°C

Temperature change = Delta T = 65

Specific heat capacity = 4.168J/g C

 (1 kJ = 1000J)

54.418 kJ amount of heat required to completely melt the sample.

At 100 °C, which is where water boils, the heat of vaporization for water is around 540 cal/g.

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Answer:

Explanation:

Zn + S ---> ZnS

Mass of Zinc + Mass of Sulphur = Mass of Zinc sulfide ( Law of conservation)

Mass of zinc= 65.4g

Mass of Sulfur =  32.1g

Mass of Zinc Sulfide= (65.4 + 32.1)g

Mass of Zinc Sulfide = 97.5g

Answer:

Gravity

Explanation:

Gravity is the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.

Answer:

Gravity

Explanation:

Gravity is the force that attracts a person or an object to weigh, or pull. I hope this helped :)

The final temperature of a 300.0-gram glass of water if it is placed

in the microwave at 22.0°C and it absorbs 5000.0 joules of energy is

3.987°C.

The equation q = MCT, where m is the mass of the sample, c is the specific heat, and T is the temperature change, can be used to determine the amount of heat that a sample (q) gains or loses. q = mct. liquid mass, m (so this would be in grams) t = temperature change. For example, water's particular constant, C, is 4.2 J g-1 K-1, therefore you just enter that value into the formula in the exam to get the energy of water.

Calculating heat energy involves using the equation Q = MCT. Mass, specific heat, and temperature change are all components of heat energy. Q = MCT. where Q is the heat energy, M is the material's mass, C is the specific heat, and T is the temperature change.

  q =  m CΔT

5000 J = 300 g × 4.18 J × ΔT

ΔT = 5000/1254

= 3.9872

= 3.987°C.

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According to solving the object's mass is 94.9g.

One of the fundamental quantities in physics and the most fundamental aspect of matter is mass. A body's mass is the measurement of the volume of matter it contains. The kilogram serves as the SI unit for mass (kg). This is how the mass formula appears:

Mass is equal to Density x Volume.

How much space an object or substance occupies is determined by its volume.

A substance or object's mass is a measure of how much matter it contains. The density of an object or substance is the ratio of its mass to its volume, or the quantity of material it contains (its mass).

According to the question

Object density=2.6g/cm³

volume= 36.5 cm³

Formula :-Mass = Density × Volume

M=2.6g/cm³ ×36.5 cm³

M=94.9g

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Lithium react slowly with water while potassium react violently with water. potassium caught  fire while lithium does not caught fire.

Chemical reaction is defined as a procedure in which one or more compounds, known as reactants, are changed into one or more distinct substances, known as products.

It can also be defined as a process in which two or more molecules collide with the proper orientation and enough force to produce a new product.

There are mainly five types of reaction.

Thus, Lithium react slowly with water while potassium react violently with water. potassium caught  fire while lithium does not caught fire.

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Molar mass of the unknown gas= 39.09 g / mol

T= TIME

MW= MOLAR MASS

MW H₂ = 2

now, Apply graham law--

graham law states that rate of effusion of a gas is inversely proportional to square root of the molar mass of its particle.

Rate1/rate2 = √(MW2/MW1)

T2/T1 =√(MW2/MW1)           (BECAUSE, VOLUME EQUAL)

(10.7/2.42)²= MW2/2

MW2=molar mass of the unknown gas = 2α×(10.7/2.42)²

=39.09 g / mol

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This tells you that the reaction will always consume 2 times more moles of lithium hydroxide than moles of sulfuric acid.

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Solid Lithium chloride (LiCl) is made up of particles arranged in a regular geometric pattern. Therefore, option (C) is correct.

In the crystalline Solid, the constituent particles are closer to each other due to the intermolecular force of attraction between them. So there is no free space between them due to which its shape can't be changed which is said to be regular geometry.

The building constituents in crystalline solids, arrange in a regular manner throughout the entire 3D network. The ordered arrangement of constituent units extends over a large distance. Thus, crystalline solids have a long-range arrangement. A crystalline solid contains a large number of units called crystals.

Lithium Chloride is a white solid soluble in water, ether, and alcohol and chemical formula for lithium chloride is LiCl.  Lithium chloride has the same crystal structure as NaCl.

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Answer:

Oxygen

Explanation:

reduction is the removal of oxygen to a substance

            Precipitate definition (Entry 2 of 3) 1: a substance that has been physically or chemically isolated from a solution or suspension, typically in the form of an insoluble crystalline or amorphous solid. 2: a byproduct, outcome, or result of a procedure or action. adjective. precipitate.

Precipitation Illustration

        Silver chloride will solidify out of solution when silver nitrate and sodium chloride are combined in water. Silver chloride is the precipitate in this instance.

       Solids are created by the process of precipitation after two chemicals react. The downword () arrow symbol is used to represent the production of precipitate in this type of reaction.

      It happens between the reactant ions in the aqueous solutions that give rise to the material. Complete response: Precipitation includes the following: snow, sleet, hail, and rain.

       An excess of the light blue precipitate dissolves to create an inky transparent solution. A little amount of sodium hydroxide solution and subsequently an excessive amount are added to solution W. There develops an insoluble white precipitate.

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No, the physical constants of abuse substance do not depend on the mass of the sample used​.

Mass and volume are intimately correlated with density. In reality, it explains the precise nature of the connection between the two. By dividing the mass of an object by its volume, we may get its density. The mass is considered to have a low density if it has a high volume but a tiny mass.

By dividing a material's mass by its volume, one can get a material's density, which is defined as its mass per unit volume. Returning to the molecular level, the mass of a material's molecules and how tightly they are packed together determine the material's density.

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A small seed crystal is placed into a melt in a crucible and pulled upward to form a single crystal using the Czochralski (CZ) method of crystal formation. The approach was created in 1916 by a Polish scientist by the name of Jan Czochralski.

How is silicon crystallized using the Czochralski CZ method?

The Czochralski method is to be used to create a silicon crystal as the solution to problem B. The crystalline silicon ingot must have 3x1015 dopant atoms per cubic centimeter. (Indicate your work.) a. if kd

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Fe(CO)₅ is the limiting reactant given the provided statement since it has the lowest ratio.

The quantity of product that can be created is constrained by the reagent that is used first in a chemical reaction, also referred to as the limiting reactant (or limiting reagent).

Calculating the moles supplied/moles stoich ratio will reveal the limiting reactant, which is the one with the lowest value.

Fe(CO)₅ ratio = [5 g / 195.9 g/mol] / 1

Fe(CO)⁵ ratio = 0.025

PF3 ratio = [8 g / 87.97 g/mol] / 2

PF3 ratio = 0.045

H2 ratio = [6 g / 2 g/mol] / 1

H2 ratio = 3

We can see that Fe(CO)5 has the lowest ratio, so it is the limiting reactant.

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Answer:

Any form of semi high energy waves cause the water molecules inside the marshmallow to vibrate which heat and soften the sugar matrix inside the marshmallow. The weakened sugar matrix allows air bubbles within the marshmallow to expand rapidly and the marshmallow puffs up and becomes goo. If this proccess is repeated it can completly change it's state of matter.

Explanation:

Energies of given waves exists:

6. 17.27 × [tex]10^{-20}[/tex]  J

7. 63.61 × [tex]10^{-23[/tex] J

8. 9.99 × [tex]10^{-24}[/tex] J

9. 41.5 × [tex]10^{-21}[/tex] J

10. 16.89 ×  [tex]10^{-19}[/tex] J

The energies of given waves exists:

6. 17.27 × [tex]10^{-20}[/tex]  J

7. 63.61 × [tex]10^{-23[/tex] J

8. 9.99 × [tex]10^{-24}[/tex] J

9. 41.5 × [tex]10^{-21}[/tex] J

10. 16.89 ×  [tex]10^{-19}[/tex] J

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