The molecular weight of table salt, NaCl, is 58. 5 g/mol. A tablespoon of salt weighs 6. 37 grams.

Calculate the number of moles of salt in one tablespoon.

First, complete the unit conversion using dimensional analysis:

Answer:

Each magnet should have been tested on many different magnetizable materials

Explanation:

In designing an experiment such as that outlined above, the experimental design should have included many different magnetizable materials.

All the types of magnets; the horseshoe, the bar, and the ring magnet should have been tested using many different magnetizable materials apart from the metal object. By so doing, the strongest magnet can be effectively determined without bias because it will attract the greatest number of magnetizable materials.

Again, the shape of the magnet affects its ability to attract objects. Hence, different shapes of magnets can not effectively be compared for relative magnetic strength.

Explanation:

bold is strong

Answer:

Endothermic

Explanation:

Notice that heat is written as part of the reactants. Therefore, heat is necessary for the reaction to proceed.

In other words, the reaction is endothermic.

Conversely, if the heat is written as part of the products, heat is released as the reaction proceeds and hence the reaction is exothermic.

Answer:

the answer is Scene

Explanation:

because it is describing the atmosphere of where the book/play is taking place

Answer:

the answer is Scene

Explanation:

Answer:

Its A.) Polymers are macromolecules

Explanation:

Answer:

The correct answer that you are looking for is A.) Polymers are macromolecules.

Answer:

C. the motion of gas particles.

Explanation:

The kinetic molecular theory is a simple but very effective model that effectively explains ideal gas behavior. The theory assumes that gases consist of widely separated molecules of negligible volume that are in constant motion, colliding elastically with one another and the walls of their container with average velocities determined by their absolute temperatures.

Answer:

the first one would be 160 and the second 82 :)

Explanation:

Answer:

160 and 82?

Explanation:

80 plus itself is 160 and 80 plus 2 is 82 minus 0 is 82.

Answer:

Reversible reactions that happen in a closed system eventually reach equilibrium. At equilibrium, the concentrations of reactants and products do not change. But the forward and reverse reactions have not stopped - they are still going on, and at the same rate as each other.

When any reversible reaction is at equilibrium, the conditions are necessarily true are the amount of reactant and products stops changing, and the rate of forward reaction equals rate of backward reaction. The correct options are B and D.

A reversible reaction occurs when the conversion of reactants to products and the conversion of products to reactants occur at the same time.

A and B can react to form C and D, or C and D can react to form A and B in the reverse reaction. In thermodynamics, this is not the same as a reversible process.

In a closed system, reversible reactions eventually reach equilibrium. The concentrations of both reactants and products remain constant at equilibrium.

But the forward and reverse reactions have not stopped; they are still occurring at the same rate.

Reversible reactions continue until equilibrium is reached, which means that the amounts of reactant and product are balanced.

Thus, the correct options are B and D.

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Fluorine reacts with Calcium metal to form calcium fluoride

[tex]\\ \rm\rightarrowtail Flourine+Calcium\longrightarrow CaF_2[/tex]

[tex]\\ \rm\rightarrowtail Fluorine(g)+Calcium (s)\longrightarrow Calcium\: Fluoride (s)[/tex]

The chemical equation when fluorine gas reacts with calcium metal to form solid calcium fluoride is Ca + F₂[tex]\rightarrow[/tex] CaF₂.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

PVC,polythene,Bakelite

Explanation:

Answer:

The biggest thing in the universe is a supercluster known in the universe is the Hercules-Corona Borealis Great Wall.

Explanation:

To convert moles to gram multiply 3.7 moles of BaF2 to the molar mass of BaF2

BaF2 molar mass = 175.326

3.7 moles x 175.326g = 648.70g BaF2

Answer:

5 N.

Explanation:

We can calculate the net force on the object by using Newton's second law of motion:

F is the net force on an object

m is the mass of the object

a is its acceleration

For the object in this problem, we have

m = 1 kg is its mass

is its acceleration

Substituting into the equation, we find the net force:

Answer:

There's nothing to arrange l

Answer:

The hydrogenation of ethene

Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced. This is a fairly pointless reaction because ethene is a far more useful compound than ethane!

Explanation:

Answer:

No.of copper atoms= no.of moles x No x atomicity

(No - avagardro's number )

= wt / atomic mass x No x 1

= 198 x 10 ^3 g / 63.5 x No

= 3.118 x 10^3 x 6.02 x 10^23

= 18.77 x 10^26 atoms.

9514 1404 393

Answer:

  Meteor: A streak of light made when an object burns up as it enters Earth's atmosphere

Explanation:

A meteorite is an object that has come from space and hit Earth.

A comet is a space object that develops a tail as it nears the sun. It is believed to be a mixture of dust and ice. In general, a comet will appear stationary in the night sky, since it moves rather slowly relative the starry background.

A meteor is a space object that makes a streak of light across the sky as it burns up in the atmosphere. (It may or may not become a meteorite, depending on the degree to which it burns up.)

__

UFOs have also been known to make streaks of light when moving across the sky.

Answer:

A streak of light made when an object burns up as it enters Earth's atmosphere

Explanation:

100 % 2021  

Answer:

B and D

Explanation:

They collect equal amounts.of solar energy

Answer:

The answer is
C. B and D

Explanation:

The equator is where there is the most solar energy
B and D are symmetrical over the equator.

The stoichiometry supports the law of conservation of mass by comparing the mass of the products to the mass of the reactants.

Stoichiometry is the measurement of the reactant and product of a reaction.

It is found in the law of conservation of mass, which says that the mass of the reactant is equal to the mass of the product.

Due to stoichiometry, if the mass of the product is known then, the mass of the reactant can be known.

Thus, the correct option is D.

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Answer:

Mass number

Explanation:

Less than 6.0 grams of copper is formed, and some aluminum is left in the reaction mixture

From the equation of the reaction:

3CuCl2 + 2Al → 2AlCl3 + 3Cu

Mole ratio of CuCl2 and Al = 3:2

Mole of 1.5 g aluminum foil = 1.5/26.98

                                                    = 0.06 moles

Mole of 14 g CuCl2 = 14/134.45

                                    = 0.10 moles

For every 3 moles of CuCl2, 2 mole of Al is needed.

Thus, for 0.10 moles of CuCl2, the mole of Al needed would be:

                                      0.10 x 2/3 = 0.07 moles

CuCl2 is, thus, slightly in excess while Al is the limiting reagent.

Mole ratio of Al and Cu = 2:3

For 0.06 mole Al, the mole of Cu will be: 0.06x3/2 = 0.09 moles

Mass of 0.09 moles Cu = 0.09 x 63.55

                                            = 5.71 g

Thus, less than 6.0 grams Cu is formed while a little CuCl2 would be left in the reaction mixture.

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Explanation:

Sodium and Potassium are highly reactive metals and react vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium iskept immersed in kerosene becauseSodium doesn't react with kerosene

Answer:

what is the initial temperature? i can answer once I know. if it doesnt say, then I dont know and I'll delete this

Answer:

Explanation:

n = 0.465

P = 4.43 atm

V = 2.25 L

T = ?

Follow this equation below

4.43 x 2.25 = 0.465 x 0.08206 x T

9.97 = 0.038 x T

(Dividing both sides by 0.038 to get rid of it)

T = 262K or you could say 262.4K

Hope this helps!!

Answer:

The permeability of a membrane is affected by temperature, the types of solutes present and the level of cell hydration. Increasing temperature makes the membrane more unstable and very fluid.

Explanation:

Answer:

See explanation

Explanation:

According to the first law of thermodynamics, energy can neither be created nor destroyed, but can be transformed from one form to another.

The thermal energy observed in the hot air while the fire rages is obtained from the chemical energy stored in carbohydrates(cellulose) that compose the wood material. As the wood is burnt, this chemical energy stored in chemical bonds of the wood material is converted to heat. The chemical reaction in the combustion of wood can be simply modeled as the combustion of n moles of glucose.

nC6H12O6(s) + 6nO2(g) ===> 6nCO2(g) + 6nH2O(g)

Note that n may even be thousands of glucose molecules that combine to form cellulose present in wood.