What is the name of bird W?

The temperature at which 37 g of both copper(II) sulfate and potassium chloride dissolve in 100 g of water is approximately 38 ⁰C.

The solubility of a substance is its ability to be dissolved in water.

The solubility of 37 g of Copper (II) sulfate is determined from the solubility curve of Copper (II) sulfate.

The solubility of 37 g of potassium chloride is determined from the solubility of potassium chloride.

Thus, from the solubility charts, the temperature at which 37 g of both copper(II) sulfate and potassium chloride dissolve in 100 g of water is approximately 38 ⁰C.

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Answer:

N2 + 3H2 ------> 2NH3

2AlBr + 3K2SO4------> 6KBr + Al(SO4)3

Answer:

Many things could of prevented the Chernobyl tragedy. Such as better staff training. If the Soviet government had learned from the lessons of the past and if they had not been so averse to spending money.

Explanation:

Have A Great Day

Hope This Helps

~Zero~

Answer:

C

Explanation:

Remark

You have to take into account what the brackets mean. They enclose a complex ion. So (SO4)3 means that you multiply the number of atoms inside the brackets by the number on the right.

Sulphur for example has a 1 after it, but the 3 on the outside multiplies the 1 by 3.

Oxygen has 4 after it. So the number of oxygens is 4*3 = 12

Givens

Answer

Blue = 2

Yellow = 3

Green = 12

C

Compared to rodents, rabbits have an extra pair of incisors and other skeletal structures that are different, scientist can conclude from this observation that they are serially homologous.

Serial homologous organs or structures are those that are structurally similar but have been modified to perform distinct functions.

As rodents and rabbits both have some similar functions and some changes in the skeletal structure, so that they both are serially homologous.

Hence scientist conclude that rodents and rabbits are serially homologous animals.

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Answer:

naclo4+koh naoh+kclo4

Explanation:

if you know your cemestry

Answer:

it's A

Explanation:

Answer:

phosphorous

Explanation:

A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. Although elements such as gold, silver, tin, copper, lead and mercury have been known since antiquity, the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous.

Answer:

A, and b, hope this is right

Explanation:

Given the various data from the question, the answers to each question is given below:

Avogadro's hypothesis

1 mole of K₂CrO₄ = 6.02×10²³ molecules

Therefore,

0.6 mole of K₂CrO₄ = 0.6 × 6.02×10²³

0.6 mole of K₂CrO₄ = 3.612×10²³ molecules

1 mole of K₂CrO₄ contains 2 moles of K.

Therefore,

0.6 mole of K₂CrO₄ will contain = 0.6 × 2 = 1.2 mole of K

From Avogadro's hypothesis,

1 mole of K = 6.02×10²³ atoms

Therefore,

1.2 mole of K = 1.2 × 6.02×10²³

1.2 mole of K = 7.224×10²³ atoms

Therefore, we can say that

0.6 mole of K₂CrO₄ = 7.224×10²³ atoms of K

Molarity is defined as:

Molarity = mole / Volume

From the question given above, we obtained the following:

Molarity = mole / Volume

Molarity = 0.5 / 2

Molarity = 0.25 M

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

Percentage = (mass of solute / mass of solution) × 100

Percentage of sugar = (50 / 250) × 100

Percentage of sugar = 20%

Total volume = 2 L

Percentage of vinegar = 5%

Volume of vinegar =?

Volume = percent × total volume

Volume of vinegar = 5% × 2

Volume of vinegar = 0.1 L

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Explanation:

Hola Mi nombre es que eres Rodríguez López

Answer:

Exothermic

Explanation:

Exothermic describes a process or reaction that releases energy

Answer:

New volume of gas is still 4.0 litres

Explanation:

Gases have no definite shape or volume. They therefore take the shape of their containers. Hence, volume of gas in a container is determined by the volume of the container. Though some gas was lost after the opening of one of the valves, volume of gas still remains the same.

Answer:

Caffeine, lead, Copper(ii) chloride, Sodium chloride, silver and tungsten

Answer:

In the article it says “

new research by British and American scientistssuggest a chemical not controlled by the international treaty poses apotential risk to the Earth's protective ozone layer.

“ which means America

and Britain retested a certain hypothesis by The Montreal Protoco

Explanation:

Answer:

makwe me brainliest pls hope it helps;)

Explanation:

Neutrons are electrically neutral, but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus

-361 kJ/mol heat would be released if 2 moles of nitrogen and 2 moles of oxygen form 4 moles of NO (g) at 101.3 kPa and 298 K.

Enthalpy of formation is defined as the heat change that is needed for formation of one mole of a substance from its constituent elements in pure state.

In the present case, Heat of formation of 4 moles of NO (g) at 101.3 kpa and 298 k is -90.25 kJ/mol. The Negative sign indicates that, heat is evolved from the system.

Thus, for 4 moles of NO, the heat of formation will be 4 X (-90.25 kJ/mol) = -361 kJ/mol.

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Answer:

Explanation:

The branch of physical chemistry that is concerned with understanding the rates of chemical reactions is called Kenetics.

The work done by the gas against an external pressure during the isotherma expansion is -12 J.

The work done by the gas against an external pressure during the isotherma expansion is calculated as follows;

W(net) = ΔP x ΔV

where;

W(net) = (6 kPa - 8kPa) x (8L - 2L)

W(net) = - 12 kPa.L

W(net) = -12 J

Thus, the work done by the gas against an external pressure during the isotherma expansion is -12 J.

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(a) The number of moles of gas for first case is 0.065 mol.

(b) The number of moles of gas for second case is 0.03 mol.

(c) The number of moles of gas for third case is 0.038 mol.

The number of moles of the gas is determined by applying ideal gas equation as follows;

PV  = nRT

n = PV/RT

where;

n = (1.06 x 1.25) / (0.082057 x 250)

n = 0.065 mol.

n = (0.8 x 0.925) / (300 x 0.082057)

n = 0.03 mol

n = (0.75 x 0.921)/(223 x 0.082057)

n = 0.038 mol

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The term hydration of an alkene is defined as the addition of water across a double bond.

The term hydration of an alkene is defined as the addition of water across a double bond. The process of hydration always yields an alcohol as -OH is aded to one of the carbon atoms in the doube bond.

The reaction commences with the attack of the -OH group by water and is completed by a proton from acid. The neutral organic product of the reaction of cycloheptene with water and sulfuric acid is shown in the image attached.

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Answer:

Medical Scientists  and  Biochemists and Biophysicists

Hope This Helps!!

Answer:

its Medical Scientists  and  Biochemists and Biophysicists

Explanation:

i got it right

Based on the molarity or molar concentration of the salt solution formed, the strength of the salt formed is 0.286 M.

Salt strength of a solution is the concentration of that salt in a given volume of solution.

The concentration is given as the moles of the salt in a given volume of solution or molarity.

The moles of salt, NaCl formed when 5 litres of 1 M HCL is mixed with 2 litres of 1 M NaOH solution is given below:

1 mole of HCl reacts with 1 mole of NaOH to form 1 mole of NaCl.

2 litres of 1 M NaOH will react with 2 litres of 1 M HCl to form 2 litres of 1 M NaCl.

Moles of NaCl in 2 litres of 1 M solution = 2 × 1 = 2 moles of NaCl.

Total volume of mixture = 7 L

Molarity of NaCl = 2 moles / 7 litres= 0.286 M

Therefore, the strength of the salt formed is 0.286 M.

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Answer:

producer of t4he food chain is the grass,the producer gets is enrgy7 by the sun and i dont4 know number 2 that4s all i know sorry

Explanation:

Answer:

1

Recall that at STP, 1 mole of any ideal gas occupies 22.4 liters. Volume O2 gas = 0.0510 moles O2 x 22.4 L/mole = 1.14 liters (3 sig.

Explanation:

hope this helps

Answer:

Third choice    see below

Explanation:

Weight change of potato chip   .45 - .42  = .03 gm

Assume all of the heat from burning the chip goes into the water (and none goes into the air or heating the can)

 24 degrees - 21 degrees = 3 degrees C  temp change

     spec heat water = 1    cal / g -cal  

  50 gm * 3 degrees * spec heat water = 150 calories  

150 calories = 150/1000 Calories  

Now for the potato chip

  150/1000 Calories   /   .03 gm =    5 Cal/gm

No elements visible!

Ions form between metals and non-metals.

Hope this helps!

Answer:

color , odor , size ( all the options except for reactivity )

Explanation:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.