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Kelso High Chem 1 Credit redemption

Last updated almost 5 years ago
52 questions
1

Approximately how many elements exist in nature?

1

Which of the following is classified as an element?

1

In the chemical reaction in which carbon, hydrogen, and oxygen absorb heat and combine to form carbon dioxide and water, which of the following is considered to be a reactant?

1

Which of the following is true for all chemical reactions?

1

The diameter of a carbon atom is 0.000 000 000 154 m. What is this number expressed in scientific notation?

1

The number of seconds in an 8 hr school day can be calculated as:

1

Which answer correctly identifies the number of protons, neutrons and electrons in the following atom - 120Sn

1

Isotopes of the same element have different:

1

Which of the following elements has properties the most similiar to calcium?

1

What is the shape of a 3p atomic orbital?

1

What is the electron configuration of potassium?

1

As a consequence of the discovery by Rutherford, which model of the atoms is believed to be true?

1

Which electron configuration is correct for S2-?

1

Which of the following element is in the halogen group?

1

Which of the following element had the smallest atomic radius?

1

As you move from left to right across the second period of the periodic table:

1

Electronegativity:

1

How many valence electrons are there in a silicon atom?

1

What is NOT true about ionic bonds?

1

Which substance is most likely ionic?

1

What is the charge on the strontium ion?

These next two are analogies. Look for the relationship between the two terms given and extend that to the next term, choosing the term that best fits the same relationship.
1

Pipe : water
Metal: _______

1

House: lumber
Bond : __________

1

The melting temperature of potassium chloride is relatively __________.

1

What is happening to the electrons in a covalent bond between two atoms?

1

Which of the following molecules contain at least one double bond?

The next section is naming formulas and determining the correct formula for the name. Use the flowcharts and your common ion list to do this.
1

Select the correct name for: SiO2

1

Select the correct name for: BF3

1

Select the correct name for: NaI

1

Select the correct name for: N2O5

1

Select the correct name for: Ca(NO3)2

1

Choose the formula for: sulfur hexafluoride

1

Choose the formula for: iodine tribromide

1

Choose the formula for: arsenic pentachloride

1

Choose the formula for: iron(II) chloride

1

Choose the formula for: magnesium sulfite

1

Choose the formula for: tetraphosphorus hexaoxide

Questions 45 and 46 refer to the following equation:
__ Pb + __PbO2 + __H2SO4 --> __PbSO4 + __ H2O + energy
1

Which of the following coefficient sets matches with a balance equation?

1

Balance this baby! Which of the following coefficient sets matches with a balance equation?
__Al + __ Pb(NO3)2 --> __Al(NO3)3 + __P

1

Two atoms with the same number of protons but a different number of neutrons are called:

1

How many protons are there in a 13C atom?

1

How many neutrons are there in a 13C atom?

1

What is the mass of a 25Mg atom?

1

How many electrons are there in a 35Cl- atom?

1

What is the molar mass of CO2?

1

What is the mass of 1 mole of (NH4)2SO4?

1

How many molecules are there in 5.3 moles of H2O?

1

What is the mass of 3.5 x 1023 CF4 molecules?

Questions 57 - 59 refer to the following equation:
2CH3OH + 3O2 --> 2CO2 + 4H2O
1

How many moles of O2 are required to react with 5 moles of CH3OH?

1

If 4.3 g of CH3OH reacts, how much CO2 will be formed?

1

If 4.3 g of CH3OH reacts, how many moles of water will be formed?

1

What is avogadro’s number?