What volume would 4.32x1023 atoms of Krypton gas occupy at STP?​

A 57 grams sample of iron reacts with 24 grams of oxygen to form 81 grams of iron oxide.

Iron oxide is a chemical compound that is made by the addition of iron and oxygen can also be known as ferrous oxide if react with two oxygen molecules then ferric oxide.

In the sample, the iron is 57 grams and the oxygen is 24 grams,

                 Fe + O -------------> FeO

                Iron   oxygen            iron oxide

By adding the mass of iron and oxygen,

             57 + 24 = 81 grams of  iron oxide.

Therefore, the mass of iron oxide is 81 grams if 57 grams sample of iron reacts with 24 grams of oxygen.

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1.24 mol Cl2 x 6.022*10^23

=  7.47 Cl2 molecules

Hope that helps!

Answer:

1 mole of c12=6.022×10^23

so

1.24 mole of c12=1.24×10^23

Explanation:

according to the mole concept

no of mole is very important

if u have that given its very easy to do the solving

if not given go for the no of mole in mole concept for first

and always remember the constant (6.022×10^23) and formulae

Answer:

0.33%

Explanation:

From the question given above, the following data were obtained:

Experimental value = 9.842 m/s²

Accepted value = 9.81 m/s²

Percentage error =?

The percentage error in the calculation can be obtained as follow:

Percentage error = |Experimental – Accepted| / Accepted value × 100

Percentage error = |9.842 – 9.81| / 9.81 × 100

Percentage error = 0.032 / 9.81 × 100

Percentage error = 0.33%

Therefore, the error in the calculation is 0.33%

Answer:

Natural gas

Explanation:

Natural gas is pretty clean when it burns compared to other gases.

Answer:

the tea was not hot sugar dissolves quickly and hot water than cold

Is the equation wrong. Such a equation cannot be formed. pls enter the write equation i will help you

Answer:

bases taste bitter, feel slippery, and conduct electricity when dissolved in water

Explanation:

Answer:

like peas

Explanation:

Answer: Salt water is a solution because it has these two characteristics: it has the same concentration of each of its parts throughout the solution, and it can be separated by some physical process.

Explanation: Literally learning about this in my science class XD

Answer:

CaCl2

Explanation:

The ionic solid CaCl₂ would have the largest lattice energy. Therefore, option (c) is correct.

Lattice energy is the heat of formation when one mole of crystalline ionic solid is generated from its constituent ions in their gaseous state.

For example, the lattice energy of sodium chloride crystal is the energy change of reaction when Na⁺ and Cl⁻ ions react to produce a NaCl crystal, which is equal to -786 kJ/mol.

The relation between lattice energy and lattice enthalpy at constant pressure is given by:

ΔU (lattice) = ΔH (lattice) - PΔV

Lattice energy is directly proportional to the charge on ions and inversely proportional to the interionic distance between ions.

For NaCl and NaF the charge on the ions is +1 and -1 while the size of the ions is small. So they have less lattice energy.

CsI ionic solid have a larger size of ions Cs⁺ and I⁻. So CsI will have less lattice energy. CsBr₂ has +2 charge on calcium but the size of both ios is larger. So, CsBr₂ will have less lattice energy.

CaCl₂ has + 2 charge on calcium as well as the ionic radius is also samll. Therefore, CaCl₂ would have the largest lattice energy.

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Answer:

d

When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Answer:

11.) Radio

12.) Microwave

13.) Infrared

14.) Ultraviolet

15.) X-Ray

16.) Gamma Ray

Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

Answer:

Honestly makes no sense sorry :(

Explanation:

I can try though.. There are three types of selectivity possible for any synthesis: (i) Chemoselectivity is deciding which group reacts. (ii) Regioselectivity is where the reaction takes place in that group. (iii) Stereoselectivity is how the group reacts with respect to the stereochemistry of the product.

A stereospecific mechanism specifies the stereochemical outcome of a given reactant, whereas a stereoselective reaction selects products from those made available by the same, non-specific mechanism acting on a given reactant. Of stereoisomeric reactants, each behaves in its own specific way.

I tried to explain it the best I could.

Hopefully this helps you :)

Feel free to correct me If it was wrong

The question is incomplete, the complete question is;

A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/L of the silver (I) perchlorate solution. Round your answer to 2 significant digits.

Answer:

13 mol/L

Explanation:

We must first obtain the number of moles of silver I perchlorate involved

Molar mass of silver I perchlorate = 207.32 g/mol

Number of moles of silver I perchlorate = 134g/207.32 g/mol = 0.646 moles

Recall that;

n =CV

C= concentration

V= volume

n = number of moles

C = n/V

C = 0.646 moles * 1000/50

C = 13 mol/L

Answer:

B

Explanation:

Because unless you are walking towards it and the ocean is not moving then only you are moving

Answer: C

Explanation:

Hot air is a lot less dense for a few reasons. Hot air essentially means the particles have more kinetic energy, and move around a lot more. Cold air is dense because the particles move a lot less, have less energy, and are closer together.

Answer:

A

Explanation:

Since the balloon itself is heavier than air, it must be filled with a large volume of something much lighter—either hot air or a very light gas, such as helium. Because the combined weight of the balloon and the gas is less than the weight of an equal volume of surrounding air, the balloon rises.

Answer:

When a ball bounces, it initially gains speed or kinetic energy—the energy of motion. When it reaches Earth, it collides head-on with an incredibly massive object that is, from your perspective, at rest. The ball slows down, deforms temporarily and shoots back up.

Explanation:

I hope this helps.

Answer:

When you hold the ball in the air, the ball has gravitational potential energy. Realizing it will turn the potential energy into kinetic energy. When the ball touches the ground, the kinetic energy will turn into elastic potential energy. When it bounces back up, it will turn into kinetic energy. When the ball is in that position where the ball was being held, it will have gravitational potential energy and repeat the cycle.

Explanation:

Terms to know:

Gravitational potential energy is the energy of an object that possesses because of its position in a gravitational field.

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object.

Kinetic energy is the energy that objects posess due to motion.

6

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Stoichiometry

Step 1: Define

[RxN - Balanced] 2AgNO₃ (aq) + Cu (s) → Cu(NO₃)₂ (aq) + 2Ag (s)

Step 2: Identify

Reactants: 2AgNO₃ (aq) + Cu (s)

# of O atoms: 2(O₃) = 6 O

Answer:

D

Explanation:

because it's so hot that it's almost to the point of changing to another element

Answer:

To be honest with you I think it is A or D

Explanation:

bc I said so

Answer:

recordando también que ** 1mL = 1cm ^ 3 **

(como ** 1 dm ^ 3 = 1 L **)

These are reactions that transfer energy to the surroundings (ie the energy exits from the reaction, hence the name exothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. A thermometer is used to detect the temperature increase.

Examples:

Combustion

Neutralisation between acids and alkali

These are reactions that take in energy from the surroundings (ie energy enters the reaction, which will help you to remember the name endothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become colder. A thermometer is used to detect the temperature decrease.

Example:

Electrolysis

Answer:

False

Explanation:

Depends mostly on heating of the earths surface being uneven

It is false that global wind patterns have less to do with air temperature than local winds.

Local winds are those that blow over a small area. Local geography, such as proximity to an ocean, has an impact on them.

Monsoons and land and sea breezes are among them. Global winds occur in belts all over the world.

Temperature differences, particularly the difference in heating at the equator and poles, and the Earth's rotation determine the global atmospheric circulation pattern.

By transporting heat and water, winds shape regional climate and influence daily weather.

Global winds are winds that occur in belts that circle the globe. Global winds, like local winds, are caused by uneven heating of the atmosphere.

Because of the Coriolis effect, winds blow diagonally across the surface.

Thus, the given statement is false.

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Answer:

Lithosphere, Hydrosphere, atmosphere

The set of Earth components that is arranged in order from solid to liquid to gas is D. lithosphere, hydrosphere, atmosphere

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Answer:

B

Explanation: im not rlly sure you can go with what i said or you dont

Answer:

MgCI2+ ___ AgNO3-->___Mg(NO3)2

i think u put 2 before NO3

Explanation: