Corrosion is what type of chemical change? a. oxidation
b. phase change
c. physical change
d. combustive reaction

Answers

Answer 1

Answer: (A)Oxidation is your answer..........

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The most common form of matter in the universe is _____.

Answers

The most common form of matter in the universe is plasma. A plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons.

The most common form of matter in the universe is _____.

plasma

In which reaction is soap a product?(1) addition (3) saponification
(2) substitution (4) polymerization

Answers

Saponification because you can rearrange the letters to spell soap.

What is one difference between a galvanometer and an electric motor?

Answers

An electric motor is a machine that is responsible for conversion of electricalenergy to mechanical energy. On the other hand a galvanometer is an electrical tool that is used to measures small values of current.

What is a galvanometer?

A galvanometer actually works by deflecting a pointer in an electric current response which is flowing through a coil under a constant magnetic field.

While an electric motor performs its operation through the interaction between the magneticfield of motor and electriccurrent in a wire winding which generate a force in the form of torque.

Thus, this was the difference between a galvanometer and an electricmotor.

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Electric motor is a machine that converts electrical energy to mechanical energy while a Galvanometer is an electrical instrument that measures small values of current.

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Bicarbonate ion is an example of aa. an acid
b. a base
c. an acidic salt
d. a basic salt
e. an amphoteric substance

Answers

It is both. We normally think of it as a base because it raises the pH of water by accepting a proton,

HCO3- + H2O <-----> H2CO3 + OH-

but if you add bicarbonate to a strongly basic solution, it actually lowers the pH by donating a proton.

HCO3- + OH- <------> CO3(2-) + H2O. That's why it is an amphoteric substance

Which of the following is not an acid-base neutralization reaction? (3 points)NH3 + HCl yields NH4Cl

NaOH + CH3COOH yields Na CH3COO + H2O

2HNO3 + Ca(OH)2 yields Ca(NO3)2 + 2H2O

H2SO4 + 2NaCl yields 2HCl + Na2SO4

Answers

fourth option...
H2SO4 + 2NaCl yields 2HCl + Na2SO4

is the correct answer...
because neutralisation reaction yields salt n water but here acid is produced so the solution isn't neutralized......

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What volume, in Liters, of a 2.00 M KCl solution contains 2.5kg of KCl? Molar mass of KCl= 74.55g/mole

Answers

According to the molar concentration, volume in liters of 2 M KCl solution is 16.76 L.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Volume required is obtained by molarity formula as, 2×74.55/2500=1/V=0.05964

∴V=1/0.05964=16.67 L.

Thus, 16.67 L of 2 M KCl solution contains 2.5 kg of KCl.

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$C_(m)=(n)/(V_(r))\n\nn=(m_(s))/(M)\n\nC_(m)=(m_(s))/(MV_(r)) \ \ \ |*MV_(r)\n\nC_(m)MV_(r)=m_(s) \ \ \ |:C_(m)M\n\nV_(r)=(m_(s))/(C_(m)M)\n\n\nm=2.5kg=2500g\nM=74.55(g)/(mol)\nC_(m)=2(mol)/(L)\n\nV_(r)=(2500g)/(2(mol)/(L)*74.55(g)/(mol))\approx16.77L$