Why do North and South Pole have different winter times?

The two poles have different location.
North Pole is found in the Western Hemisphere.
The tilt of the Earth towards the Sun changes throughout the year.
North Pole is found in the Northern Hemisphere.

Answer:

The atomic weight Ar, of M is 64

Explanation:

The formula of the given compound is M(OH)₂

Mr, is the molecular weight of a compound and for the given compound, Mr is equal to 98.

Ar, is the atomic weight of the elements in the compound

The molecular weight, Mrof a compound is the mass of one mole mole of that compound. It can be obtained by summing the atomic masses of all elements in that compound. For elements that has more than one atom in the compound, the atomic weight of that element is multiplied by the number of atoms of the element present in the compound and then the sum of the weight of each element gives the molecular weight of the compound.

Onnthe compound above,the atomic weight of the unknown element M, is to be obtained.

Ar of the other elements inn he compound is given : Ar of O = 16, Ar of H = 1.

Molecular weight of the compound, Mr = 98

Calculating for the Ar of M:

(M × 1) + (16 × 2) + (1 × 2) = 98

M +32 + 2 = 98

M + 34 = 98

M = 98 -34

M = 64

Therefore, the atomic weight Ar, of M is 64

Answer:

3.     c

4.     d

5.     c

Explanation:

Explanation:

No of moles = mass/ molar mass

MgCl2 = 24+35.5*2

= 24+70

= 94 gmol—1

No of moles = 1.25/94

= 0.013 moles

One mole of magnesium chloride weighs 95.21 grams. Therefore, the number of moles in  1.25 grams of the compound is 0.0131 moles.

Magnesium chloride is an ionic compound formed by the electron transfer from magnesium metal to the chlorine atoms.

To determine the number of moles of MgCl₂ in 1.25 grams, we need to use the formula:

moles = mass / molar mass

The molar mass of MgCl₂ can be calculated by adding up the atomic masses of its constituent atoms, which are:

Mg: 24.31 g/mol

Cl: 35.45 g/mol (x2, since there are two Cl atoms in MgCl2)

So, the molar mass of MgCl₂ is:

MgCl₂: 24.31 g/mol + 35.45 g/mol x 2 = 95.21 g/mol

Now we can use the formula to calculate the number of moles:

moles = mass / molar mass = 1.25 g / 95.21 g/mol

moles = 0.0131 mol (rounded to four significant figures)

Therefore, there are approximately 0.0131 moles of MgCl₂ in 1.25 grams.

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Answer:

Kb = 2.23 x 10⁻⁵

Explanation:

Benz-CO-NH₂ + H₂O => Benz-CO-NH₃⁺OH⁻ ⇄ Benz-CO-NH₃⁺ + OH⁻

given pOH = 2.91 => [OH⁻] = 10E-2.91 = 1.23 x 10⁻³M

                         Benz-CO-NH₃⁺OH⁻ ⇄ Benz-CO-NH₃⁺   +       OH⁻

At Equilibrium           0.68M                    1.23 x 10⁻³M          1.23 x 10⁻³M

Kb = [Benz-CO-NH₃⁺][OH⁻]/[ Benz-CO-NH₃⁺OH⁻]

= (1.23 x 10⁻³)² M²/ 0.068M = 2.23 x 10⁻⁵

HCI + NaOH --> NaCl + H2O

Neutralization reaction is the reaction between acid and base which results in formation of salt and water. Here salt is NaCl (common salt) in above reaction.

SO, (A) H20 + NaCl is your answer.

Answer:gear

Explanation:just did it right now

Answer: Gear

Explanation: just did it on Edge 2021

Answer:

3.04 mol NH3* (17.03 g NH3/ 1 mol NH3)= 51.8 g NH3~

The mass in grams of 3.04 mol of ammonia vapor is 51.68g

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Moles of ammonia = 3.04 moles

Molar mass of ammonia = 14 + 3 = 17

Moles = mass / molar mass

Mass = moles × molar mass

= 3.04 × 17

= 51.68 g

Therefore, mass in grams of 3.04 mol of ammonia vapor is 51.68g

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Answer:

C. 33.6L

Explanation:

Based on the reaction, 2 moles of HCl reacts producing 1 mole of hydrogen.

To solve this question we must find the moles of hydrogen produced using the reaction. Then, with combined gas law (PV = nRT) we can find the volume produced:

Moles H2:

3.00 moles HCl * (1mol H2 / 2mol HCl) = 1.50 moles H2 are produced

Volume:

PV = nRT

V = nRT / P

Where P is pressure = 1atm at STP

V is volume = Our incognite

n are moles of the gas = 1.50 moles

R is gas constant = 0.082atmL/molK

T is absolute temperature = 273.15K

V = nRT / P

V = 1.50mol*0.082atmL/molK*273.15K / 1atm

V = 33.6L

Answer:

74.99g

Explanation:

Mass of a substance can be calculated by using the formula;

mole = mass ÷ molar mass

mass = molar mass × mole

According to this question, 37.2 moles of hydrogen gas is given.

Molar mass of hydrogen gas (H2) = 1.008(2) = 2.016g/mol

mass = 2.016 × 37.2

Mass of H2 = 74.995

Mass = 74.99g

Answer:

Geothermal energy is an uptrending alternative source of production that relies on the earth's crust and elements of radioactivity.

Answer:

wat dose dis du

Explanation:

u to frend lit me now if yu need help with yur math and english homewirk. me got anser 2 evryting

Propanal will form silver mirror upon heating with Tollen's reagent while propanoic acid will not respond.

Answer:

Solids, liquids, gases - all matter - are made up of atoms (or other things, like molecules, that are made from atoms)! ELEMENTS are the kinds of atoms that we can have. Carbon is an element, hydrogen is an element, and so is oxygen. ... Atoms can join together - they form bonds together - to make MOLECULES.

Answer:

1 is the chemical formula for water, meaning that each of its molecules contains one oxygen and two hydrogen atoms.

2 a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.

3 Chemical abbreviation for sodium chloride (table salt)

Answer:

So the total mass is 50 plus 150 grams the heat capacity 4.18 joules per gram per degree C. And the temperature change is 36 minus 25 and so we can calculate Delta H for the reaction that takes place.

Explanation:

Answer: C

Explanation: The evaporation rate depends on the exposed surface of liquid as long as both glasses stay at the same temperature. Since both glasses have the same surface area, they should both evaporate at the same rate.

Answer:

10 moles of S₈

320 moles O₂

Explanation:

The balanced equation is:

Now we can convert moles of SO₈ (the product) into moles of each reactant, using the stoichiometric coefficients of the balanced reaction:

In order for 80 moles of SO₈ to be produced, 10 moles of S₈ need to react with 320 moles of O₂.

Answer:

11.9 g of nitrogen monoxide

Explanation:

We'll begin by calculating the number of mole in 6.75 g of NH₃. This can be obtained as follow:

Mass of NH₃ = 6.75 g

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3

= 17 g/mol

Mole of NH₃ =?

Mole = mass /molar mass

Mole of NH₃ = 6.75 / 17

Mole of NH₃ = 0.397 mole

Next, we shall determine the number of mole of NO produced by the reaction of 0.397 mole of NH₃. This can be obtained as follow:

4NH₃ + 5O₂ —> 4NO + 6H₂O

From the balanced equation above,

4 moles of NH₃ reacted to produce 4 moles of NO.

Therefore, 0.397 mole of NH₃ will also react to produce 0.397 mole of NO.

Finally, we shall determine the mass of 0.397 mole of NO. This can be obtained as follow:

Mole of NO = 0.397 mole

Molar mass of NO = 14 + 16 = 30 g/mol

Mass of NO =?

Mass = mole × molar mass

Mass of NO = 0.397 × 30

Mass of NO = 11.9 g

Thus, the mass of NO produced is 11.9 g

Answer:

true

Explanation:

Answer:

false

Explanation:

Sedimentary rocks form by breaking down other kinds of rocks into small particles and washing or blowing them away; metamorphic rocks form from other rocks and igneous rocks form by melting other rocks. ... Igneous Rocks: form by crystallizing melted material (magma).

Answer: hewo, there! your answer is Below

CH4(g) + 2O2(g) CO2(g) + 2H2O(g) + 802 kJ/mol

Explanation:

Hope this helps!!!

Have a great day!!!

The reaction [tex]CH_{4} (g)+2O_{2}[/tex] → [tex]CO_{2}(g) +2H2_{O} (g)+802kJ/mol[/tex]

shows combustion reaction of methane in which energy 802 KJ/mol energy produces.

A combustion reaction occurs when a substance combines with oxygen gas and produces energy in the form of light and heat. One of the reactants in combustion reactions must be oxygen. Water vapor is produced when hydrogen gas is burned.

It can be seen that this reaction give carbon di-oxide and water hence, combustion reaction will show this reaction.

[tex]CH_{4} (g)+2O_{2}[/tex] → [tex]CO_{2}(g) +2H2_{O} (g)+802kJ/mol[/tex]

the correct answer will be option (c).

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Answer:

the answer is 5 degree

Explanation:

E⁣⁣⁣xplanation i⁣⁣⁣s i⁣⁣⁣n a f⁣⁣⁣ile

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Answer:

75m

Explanation:

C. Venus is the answer..

Answer:

Opposites

Explanation:

In positron emission, a proton is converted to a neutron by emitting a positron and a neutrino. In electron capture, an outside electron is pulled inside the nucleus and combined with a proton to make a neutron, emitting only a neutrino.

Answer:

Food storage. The food reserves can be drawn upon to ensure good development of a flower stalk and seeds.

Explanation:

Hope this helps!

Answer:

(with reference to a solid) become or cause to become incorporated into a liquid so as to form a solution.

Answer:

2.7*10^-13

coefficient= 2.7

exponent= -13

Explanation:

Answer: 2.7 x 10^-13

Explanation: