Please help thank you (15 points)

Answer:

a physical change only changes the look of something whereas a chemical change occurs when one thing has a reaction and it forms a new substance.

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what is the chemical formula of (Sodium hydroxide ) ??

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Answer:

The formula of Sodinm hydroxide is NaOH

Hope it helps

Answer:

When the concentrations of the reactants are raised, the reaction proceeds more quickly. ... When solids and liquids react, increasing the surface area of the solid will increase the reaction rate. A decrease in particle size causes an increase in the .

The standard voltage for the equation CuCl₂ + Zn —> ZnCl₂ + Cu is -1.1 Vol.

Voltage is the pressure of the charged electrons in an electric circuit which pushes the electrons towards the switch, which makes the light illuminate. By Ohm's law, voltage is equal to current x resistance.

V = IR

The reaction is CuCl₂ + Zn —> ZnCl₂ + Cu, which means it is a dry cell battery, where the anode, zinc reacts with chloride that is the cathode. In the dry battery cell, the chemical energy is stored in it, which converts into electrical energy.

The voltage will be minimum, which is -1.1. The liquid battery cells or the electric fittings in our house contain high voltages because it gets direct current, but dry battery cells contain minimum amount of voltage and it is used to operate small objects.

Thus, the standard voltage will be -1.1 Vol.

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Answer:

CH3OH

Explanation:

has hydroxide ions

Solubility has been the property of the substance to get dissolved to form the solution. Methanol (CH₃OH) is more soluble in water than Diiodomethane (CH₂I₂).

Solubility is best defined as the capability of the substance to get dissolved or dissociated into a solvent for the formation of the solution at a given temperature. The solubility of the various substances varies and is an important part of the mixture and solution.

Solubility in water has been the measure of the solute to get dissolved in water. The pressure and the temperature of the system directly affect the solubility of any substance in a solvent. Water is a polar molecule with hydrogen bonds in a great solvent that dissolves almost all the molecules like salt, sugar, etc.

Methanol is soluble in water as it contains hydrogen bonds as the intermolecular forces that interact with the polar water molecule by the virtue of the hydroxide and the hydrogen ions that show the molecular attraction and allows the molecule to get dissolved.

Therefore, methanol is soluble in water.

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Answer:

Ether is the correct answer

Explanation:

It is based.

Answer:

1.5055×10²⁴

Explanation:

................................

Answer:

hope it's help you dear

Explanation:

If one drops a stone into a pond, a very rapid, thin jet of water spouts upwards. ... A cavity forms behind the object during impact on the water surface. This cavity is subsequently compressed by hydrostatic pressure, which leads to the formation of the jet

Answer:

Scientific laws and theories have different jobs to do. A scientific law predicts the results of certain initial conditions. ... In simplest terms, a law predicts what happens while a theory proposes why. A theory will never grow up into a law, though the development of one often triggers progress on

Explanation:

since the unit for the heat of fusion is kJ/mol, you're going to have to convert the grams into moles in order to cancel out the unit. After that, you can solve like normal.

Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, the amount of heat required to melt 2108 g of water is 703.7kJ.

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.

Mathematically,

q = n ×ΔH

where

q = amount of heat=?

ΔH = enthalpy=6.010 kJ/mol

n = no of moles

n = w / M.M

w = given mass

M.M = molar mass

moles of water=2108 g ÷18g/mol

                             =117.1 mol

substituting all the given values in the above equation, we get

q =6.010 kJ/mol ×117.1 mol

    =703.7kJ

Therefore, the amount of heat required to melt 2108 g of water is 703.7kJ.

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Answer:

no

Explanation:

make use of this formula to find the mass of each sample.

m=density*volume

Answer:

Sand

Explanation:

If you get salt or sugar in your water, you have to legit desalinate it to get the water and item out. You need to evaporate the water by increasing temperature and then lower temperature to separate the substances.

If you have alcohol, you need to distill it by trapping it and stuff.

With sand, the molecules are much larger which lets you separate the substances easily.

For example, on a beach, you can slap a handful of sand in your pail, but the sand sinks to the bottom right? You can just pour out the water.

False is the correct answer.

Answer:

22 options A cell wall

23 options A anabolism

24 options B 2sugar + 1phosphate group

Answer:

heterogeneous mixture

Explanation:

(a) A mixture with the same composition and properties throughout is called a homogeneous mixture. (b) A mixture, the different parts of which vary in composition and properties, is called a heterogeneous mixture.

Answer:

The correct answer is Science is objective, whereas pseudoscience is subjective. Pseudoscience includes beliefs, theories, or practices that have been or are considered scientific, but have no basis in scientific fact. This could mean they were disproved scientifically, can't be tested or lack evidence to support them.

Explanation:

hope its help

thank you

Answer:  Technically, this cannot be answered, since none of the H atoms have a mass number assigned.  With the assumption noted delow, I calculate 1.012 as the average atomic mass.

Explanation:

My answer is based on assumed masses for the three H isotopes:

1H :   1 AMU

2H:   2 AMU   Deuterium

3H:    3AMU   Tritium

     AMU   Rel Abund.    Wt. Avg

1H 1     99.00%      0.99

2H 2       0.80%      0.016

3H 3       0.20%       0.006

              Sum   1.012

Answer:

Displacement

Explanation:

OH- in the reactant side of the reaction has switched from Na+ to Al 3+ in the product side. Decomposition is where a compound from the reactant side of the reaction would dissolve into elements in the product side, but that's not the case in this example.

Answer:

if its under 7 then it's an acid you neek over 7 is alkaline

Answer:

It's A. 120 cubic meters

Answer:

a

Explanation:

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Answer:

Kaleidoscope is an optical toy consisting of two mirrors at a particular angle. Some common uses of the kaleidoscope are: Kaleidoscope produces beautiful patterns that are used by fashion designers. A kaleidoscope is used as a toy for entertainment.