CHEM V2 (correct version)

Acids have what characteristic pH value?

A. Equal to seven.

B. Equal to seven times seven.

C. Lower than seven.

D. Higher than seven.

C. Lower than seven.

Which term describes the smallest part of an element that still retains the properties of that element?

A. Mole.

B. Compound.

C. Atom.

D. Molecule.

C. Atom.

What is the state of sodium in solution?

A. Cation.

B. Covalent compound.

C. Anion.

D. Ionic compound.

A. Cation

A graduated cylinder is massed at 101.35 g. A solution is added to the cylinder and it is remassed at 145.26 g.

if the volume reads 26.4 ml on the graduated cylinder, what is the density of the solution?

A. 0.601 ML/G.

B. 1.66 G/ML.

C. 17.51 G/ML.

D. 1160 G/ML.

B. 1.66 G/ML

What are the principle components of enzymes?

A. Amino acids.

B. Fatty acids.

C. Carbohydrates.

D. Substrates.

A. Amino acids

What type of reaction is exothermic and takes place in combination with oxygen?

A. Double replacement.

B. Combustion.

C. Combination.

D. Single replacement.

B. Combustion

Chlorine has an electronegativity value of 3.0, and hydrogen's value is 2.1. What type of bond is present

between the chlorine and hydrogen atoms in a molecule of hydrochloric acid?

A. Ionic.

B. Polar covalent.

C. Nonpolar covalent.

D. Hydrogen.

B. Polar covalent

How many electrons are present in a neutral of sodium (atomic #11)?

A. 9.

B. 10.

C. 8.

D. 11.

D. 11.

What type of energy is the SI unite?

A. Potential.

B. Joule.

C. Kilowatt.

D. Calorie.

B. Joule.

Write a balanced equation for the chemical reaction of sliver nitrate with copper.

A. 2Cu+4AgNO3 ?2Cu(NO3)2+Ag

B. Cu + AgNO3 ?Cu(NO3)2+Ag

C. 2Cu+3 AgNO3 ?Cu(NO3)3+Ag

D. Cu+2 AgNO3 ?Cu(NO3)2+2 Ag

D. Cu+2 AgNO3 ?Cu(NO3)2+2 Ag

Jacuzzis need to be kept near neutral pH. Which value represents a safe pH?

A. 6.2

B. 5.8

C. 7.1

D. 5.6

C. 7.1

Carbon dioxide contains what types if atoms?

A. 1 carbon and 2 oxygen's.

B. 2 hydrogen's and 1 oxygen.

C. 1 carbon and 1 oxygen.

D. 2 carbons and 2 oxygen's.

A. 1 carbon and 2 oxygen's

Which term describes the separation of ions from one another?

A. Adsorption.

B. Solvation.

C. Dissociation.

D. Saturation.

C. Dissociation.

What type of reaction results in the release of energy to the surroundings?

A. Exothermic

B. Energetic.

C. Endergonic.

D. Endothermic.

A. Exothermic

What does the term alloy refer to?

A. An insoluble substance.

B. A metal and a non-metal mixed together.

C. The substance that does the dissolving.

D. Two or more metals mixed together.

D. Two or more metals mixed together.

What property of water allows for its high surface tension?

A. High heat of vaporization.

B. Ability to form hydrogen bonds.

C. Linear shape.

D. High specific heat.

B. Ability to form hydrogen bonds.

Which term means a mixture in which the components are distinguished from each other?

A. homologous.

B. kinetic.

C. heterogeneous.

D. Homogenous.

C. heterogeneous.

What does the atomic number of an element represent?

A. Number of protons plus neutrons.

B. Number of protons.

C. Number of neutrons plus electrons.

D. Number of neutrons.

B. Number of protons.

The fluid nature of the cell membrane is due to the presence of what biochemical compounds?

A. Carbohydrates.

B. Acids.

C. Proteins.

D. Lipids.

D. Lipids.

Which elements are transition metals?

A. Fe, B, Na, Si.

B. Ni, Ag, B, Si.

C. Fe, Zn, Ag, Hg.

D. Ni, Cu, Si, Mn.

C. Fe, Zn, Ag, Hg.

What particles are found in the nucleus of an atom?

A. Protons and neutrons.

B. Protons and electrons.

C. Protons.

D. Neutrons.

A. Protons and neutrons

When water and oil combine, what type of mixture is formed?

A. Suspension.

B. Heterogeneous.

C. Colloid.

D. Homogeneous.

B. Heterogeneous

What are the basic building blocks of proteins?

A. Phospholipids.

B. Organic enzymes.

C. Monosaccharides.

D. Amino acids.

D. Amino acids.

What is the correct name for Sr(NO3)2. 4H2O?

A. Scandium nitrite hexahydrate.

B. Scandium nitrate hexahydrate.

C. Strontium nitrate tetrahydrate.

D. Strontium nitrate hexahydrate.

D. Strontium nitrate tetrahydrate

Which statement describes nitrogen?

A. Has 9 electrons.

B. Is a nonmetal.

C. Has 10 neutrons.

D. Exists in nature as monoatomic gas.

D. Exists in nature as monoatomic gas

What is the formula for the ionic compound formed by barium ions and nitrate ions?

A. Ba(NO3)2.

B. Ca3(SO4)2

C. Ca2(SO4)2

D. Ca3S2

A. Ba(NO3)2.

Which compound is an inorganic compound?

A. CO2.

B. NO2.

C. C6H12O6.

D. C5H12.

A. CO2

What type of linkage is used to join amino acids into a protein?

A. Peptide bonds.

B. Hydrogen bonding.

C. Disulfide bridges.

D. Ionic bonding.

A. Peptide bonds

A one-liter balloon is composed of 0.5 mole of helium gas. What volume will 1.8 moles of helium occupy at

the temperature and pressure?

A. 4.2 Liters.

B. 0.3 Liter.

C. 0.6 Liter.

D. 3.6 Liters.

D. 3.6 Liters

What does a buffer regulate?

A. Water content.

B. pH.

C. Metabolism

D. Blood flow.

B. pH.