Please help me and I’ll give you brainiest!!!!!!!!!



Have a wonderful day!!:)))

In order of  increasing percent water content:CoCl₂.6H₂O, Ba(OH)₂.8H₂O, MgSO₄.7H₂O

[tex]\tt \%element=\dfrac{Ar~element}{MW~compound}\times 100\%[/tex]

CoCl₂.6H₂O.MW=237.90 g/mol

6H₂O MW = 6.18=108 g/mol

[tex]\tt \%H_2O=\dfrac{108}{237.9}\times 100\%=45.4\%[/tex]

MgSO₄.7H₂O.MW=246.48 g/mol

MW 7H₂O = 7.18=126 g/mol

[tex]\tt \%H_2O=\dfrac{126}{246.48}\times 100\%=51.1\%[/tex]

Ba(OH)₂.8H₂O MW=315.48 g/mol

MW 8H₂O = 8.18=144 g/mol

[tex]\tt \%H_2O=\dfrac{144}{315.48}\times 100\%=45.6\%[/tex]

Answer:

d = 9.5× 10⁻⁴ Kg/cm³

Explanation:

Given data:

Length of cube = 1.02 cm

Mass of cube = 0.001012 Kg

Density of cube = ?

Solution:

The length , height and width of cube is always same. Thus the volume of cube is,

Volume = length × height× width

Volume = 1.02 cm × 1.02 cm × 1.02 cm

Volume = 1.06 cm³

Density of cube:

d = 0.001012 Kg /1.06 cm³

d = 9.5× 10⁻⁴ Kg/cm³

Answer:

B

Explanation:

Answer:

The same amount of atoms (3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms).

Explanation:

According to the law of conservation of mass, when a chemical reaction takes place there is no synthesis or degradation of matter, that is, matter can be neither created nor destroyed. It can only be transformed.

Therefore, in a chemical reaction the atoms are conserved. That means that the elements that in definite proportions are forming a compound, will reorganize to form new compounds, and the amount and type of atoms of the products will be the same as the reactants.

In summary, if the reactants in a chemical equation have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms, the products of the chemical equation will have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms as well.

Answer: C (1)

Explanation:

H is only the element hydrogen.

Answer:

1s*2 2s*2 2p*6

Explanation:

atomic number of neon is 10 so the s-shell contains 2 electron and p-shell contains 6

Answer:

true im pretty sure

Explanation:

Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question we have

[tex]P_2 = \frac{2 \times 99.9}{8} = \frac{199.8}{8} \\ = 24.975[/tex]

We have the final answer as

Hope this helps you

Answer:

25 atm

Explanation:

Hope I helped

Answer:

P₂ = 0.99 atm

Explanation:

Given data:

Initial pressure = 1.02 atm

Initial temperature = 11.2°C

Final pressure = ?

Final temperature = 4.00°C

Solution:

Initial temperature = 11.2°C (11.2+273 = 284.2 K)

Final temperature = 4.00°C (4.00+273 = 277 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

1.02 atm / 284.2 K = P₂/277 K

P₂ = 1.02 atm × 277 K / 284.2 K

P₂ = 282.54 atm. K /293 K

P₂ = 0.99 atm

Answer:

D.

Explanation:

Answer:

The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.

wait..if you asking about the country it's Brazil✌️

Answer:

D. Fetus

Explanation:

Answer:

Explanation:

Saturated solution

Answer:C

Explanation:The samples are composed of different proportions of copper and zinc

Answer:

Limitations of Rutherford Atomic Model

Although the Rutherford atomic model was based on experimental observations it failed to explain certain things. Rutherford proposed that the electrons revolve around the nucleus in fixed paths called orbits. ... Ultimately the electrons would collapse in the nucleus.

if I am correct I think its I'm am not 100 percent sure but I think this should be the answer

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

Using the formula of gravitational attraction

F = G*M1M2/d²

where G = 6.67 * 10⁻¹¹ Nm²Kg⁻²

M1 = 8000Kg

M2 = 1500 Kg

F =  6.67 * 10⁻¹¹ * 8000 * 1500 / (1.5)²

F = 3.56 * 10⁻⁴ N

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

Learn more at: https://brainly.com/question/19082714

Answer:The limestone began to form millions of years ago, when the land was under the ocean. The rock developed from shells of tiny organisms that float in the ocean. ... However, in the case of reefs, the limestone is produced directly as coral organisms build their skeletons one on top of another.

Answer:

b12 and d3

Explanation:

Answer:

O, I, Ca

Explanation:

Answer:

Radioactive Decay

Explanation:

Answer:

the answer is cell division

Explanation:

cell division is the process by which a present cell divides into two or more daughter cells.

the process can also be called cell cycle

Answer: this is not my own words :)

Learn how factors, such as exposure to the atmosphere, the composition of rock and climate affect the rate of weathering. Weathering is the mechanical or chemical process by which rocks are broken down. The weathering that happens to rocks can be understood by relating it to the digestion of a chocolate chip cookie

One of the factors that affects the rate of weathering is exposure to the atmosphere. ... Another factor that affects the rate of weathering is the composition of rock. Rocks are composed of minerals, which are solid substances found within rocks that have their own distinct chemical composition.

Answer:

The sun is what makes the water cycle work. ... Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle.

Explanation:

Answer it doesn't contribute

Explanation: it doesn't contribute

Answer:

A

Explanation:

If a compound begins with metal, it is most likely to be a metallic compound. Thus, option A is correct.

The metallic compound has been formed when the metal has been bonded with a metal or more than 1 metal by the ionic or covalent interaction.

The ionic interactions result in between the metal and non-metal or between two metals, and the covalent interactions have been found in the nonmetals.

The molecular compound has been the one that has been formed a molecule. All the compounds are molecular compounds.

Thus, if it starts with metal, it has been most likely to form a metallic compound. Thus, option A is correct.

For more information about the compounds with metal, refer to the link:

https://brainly.com/question/18665430

Volume of Argon = 59.972 L

In general, the gas equation can be written  

[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

At STP(0 C, 1 atm), 1 mol gas= 22.4 L

so for 20 L

[tex]\tt \dfrac{20}{22.4}=0.893[/tex]

For Argon

P = 1 atm

T = 273 K x 3 =819 K (tripled)

n = 0.893 (the same number of moles)

R = 0.082 L/atm.mol K

[tex]\tt V=\dfrac{nRT}{P}=\dfrac{0.893\times 0.082\times 819}{1}=59.972~L[/tex]

Answer:

Explanation:

C