Help me i don’t know what to put here pls thank you!

Answer:

0.087 moles of water

Explanation:

Given data:

Number of molecules of water = 5.24×10²² molecules

Number of moles of water = ?

Solution:

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules of water

5.24×10²² molecules × 1 mol / 6.022 × 10²³ molecules

0.87×10⁻¹ mol

0.087 mol

Answer:

15.24 × 10²³ atoms

Explanation:

Given data:

Number of atoms of Na = ?

Number of moles of Na = 2.53 mol

Solution:

1 mole contain 6.022× 10²³ atoms.

2.53 mol × 6.022× 10²³ atoms / 1mol

15.24 × 10²³ atoms

The number 6.022 × 10²³ is called Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

Answer:

There are two electrodes in an electrolysis solution: the positive and the negative electrode. The reaction that happens at each electrode is different. ... Positively charged ions (metals and hydrogen), are attracted to the negative electrode (the cathode), where they receive electrons (a process known as oxidation).

Explanation:

A half equation is used to represent the reaction that happens at an electrode during electrolysis . It shows what happens when ions gain or lose electrons .

hope this helps ^^

Answer:

The answer would most likely be C

Answer:

  about 36.10 g

Explanation:

The proportion of interest is ...

  mass/atoms = x/(1.810·10^24) = (12.0107 g)/(6.02214076·10^23)

Multiplying by 1.810·10^24, we find the mass of the sample to be ...

  x = 36.0991 g

The mass of the sample is about 36.10 grams (to 4 s.f.).

Answer:

Answer:

D

Explanation:

Since the negative particles are going towards the negative section and the positive particles are leaving the positive section. Additionally, opposite charges attract each other and like charges repel each other.

There will be attraction between the opposite charges and repulsion among the like charges. Here the diagram D shows a correct interaction between the fields of two charged particles.

The electric force acting per unit charge is defined as the electric field. They are generally produced by changing the electric charges or magnetic fields. The electric field strength is expressed in volt per meter (V/m).

E = F/Q

In an electric field it is the electric charge which provides the direction of field. If the charge is negative, then the field is directed towards the charge. A field is directed away from the charge if the charge is negative.

All the electric fields start form a positive charge and end on a negative charge. If two positive charges interact then there will be repulsion between them. But if a positive charge interact with a negative charge then there will be attraction among them.

In diagram D there is an attraction between the opposite charges.

Thus the correct option is D.

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Answer:

2

Explanation:

because it helps to balance the equation

Answer:

2

Explanation:

We want to balance the equation. On the right, there are 4 hydrogens, and 2 oxygens. We should have the same amount on the left.

For hydrogens, we want 4. 2 *2 =4,

Therefore, the answer is 2

I hope this helps! :)

Answer:

This is false

Answer:

100% false

Explanation:

common sense

Answer:

Radiation

Explanation:

Radiation is energy that comes from a source and travels through space or heat energy through the air

I hope this helps u..

Answer:

Na, soudium

Explanation:

also Fr Francium.

Explanation:

I think it means that even if you dont succeed at something the first time you do it doesn't mean you sould give up.

Answer: metal i believe

Explanation:

Answer:

It is a rare and lustrous silvery-white metal

Explanation:

Answer:

1 mole

Explanation:

A mole of water molecules contains 2 moles of hydrogen atoms and 1 mole of oxygen atoms.

Answer:

35.1 grams H2O

Explanation:

Using the molar mass of water (18.016 g/mol):

1.95 mol H2O * (18.016 g H2O / 1 mol H2O) = 35.1312 g H2O --> 35.1 g H2O (with sig figs)

Answer:

I am sorry but this is cheating you have to come up with your own answer

Explanation:

Answer:

The heat that fuels the hot spot comes from very deep in the planet. This heat causes the mantle in that region to melt. The molten magma rises up and breaks through the crust to form a volcano. While the hot spot stays in one place, rooted to its deep source of heat, the tectonic plate is slowly moving above it.

Explanation:

Answer:

118750 ml

Explanation:

The chemical equation for complete combustion of hexane is given as;

2C6H14 + 19O2 → 12CO2 + 14H2O  

From the equation of the reaction;

2 mol of C6H14 reacts with 19 mol of O2

2 ml of C6H14 reacts with 19 ml of O2

2500 mL of C6H14 would react with x ml of O2

2 = 19

2500 = x

x = 2500 * 19 / 2 = 23750 ml

Since oxygen is 20% of air;

23750 = 20 / 100 * (Volume of air)

Volume of air = 23750 * 100 / 20 = 118750 ml

Answer:

Its D. Water

Explanation:

hope this helps :)

Answer:

There will be 2 nitrogen and 2 oxygen atoms in the product.

Explanation:

In a chemical reaction, atoms are neither created or destroyed, which means if there are 2 nitrogen atoms in the reactants, there will be 2 nitrogen atoms in the products. Similarly, if there are 2 oxygen atoms in the reactants, there will be 2 oxygen atoms in the products.

Let me know if this helps!

Answer:

-------> CH2 + Ca(OH)2

0.59 moles

111 moles

30 moles

0.15 moles

Answer: C

Explanation:

Rate = k[A] = first order reaction

Given

Rate law

Required

A first-order reaction

Solution

The rate law : equation for the rate of chemical reaction

For reaction

aA + bB ⇒ C

The rate : r = k[A]ᵃ[B]ᵇ

The sum of exponents(a+b) is the reaction order

From the choice :

a. a+b = 2, second order reaction

b. a+b = 3, third order reaction

c. a+b = 4, fourth order reaction

d a+0 = 1, first order reaction

Answer:

A.

Explanation:

Its [Ar] 3d¹⁰4s²

Answer:

aufbau principle

Explanation:

The Aufbau principle states that electrons fill lower-energy atomic orbitals before filling higher-energy ones (Aufbau is German for "building-up"). By following this rule, we can predict the electron configurations for atoms or ions.

Answer:

Halogens

Explanation:

From the given choices, the halogens will have the smallest radius within the same period.

The size of an atom is estimated by the atomic radius. This is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid state.

Since halogen is the right most group from the choices given, it will have the smallest radius.

Answer:

nertial mass is a measure of how difficult it is to change the velocity of an object. Example. Calculate the force needed to accelerate a 22 kg cheetah at 15 m/s².

Explanation:

Answer:

Solution A

Explanation:

Correct on Edge Cumulative Review Exam 2021

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The unsaturated solution is the one where, the amount solute is lower than  the solubility at a specific temperature. Hence, the solution  A will form an unsaturated solution.

Unsaturated solutions are those having the lower concentration of solute than the saturation point of the solvent. Whereas, a saturated solution will completely dissolve the solute in its maximum amount and beyond a point the solute cannot be dissolved.

At a specific temperature gradient, if the dissolved solute is equal to the solvent's saturation point it will form a saturated solution. From the given table it is clear that except solution A all solutions have higher amount of solute than the saturation point.

As the solute concentration is higher, the solvent will try to dissolve maximum amount of the solute. Hence, in solution A have only 20 g of solute added but its saturation point is 37 g/100g. THus, the solution forms an unsaturated solution.

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