U2S1 Intro to Chemistry - Kathleen Zahos | Biblioteka

1

How many molecules are represented here: 4 Hg

1

Baking powder contains: sodium bicarbonate, cornstarch, calcium phosphate and other components. Baking powder is classified as a .......

molecule

compound

substance

mixture

1

Report this number in two significant figure: 39704.89

2

Which of the following statements about compounds/compound formation are false? More than one answer may apply.

Sugar water is an example

Specific quantities of elements must be present

Have "new" properties

Carbon dioxide is an example

Color change may occur during formation

Can be heterogeneous or homogeneous

2

Which of the following is a TRUE statement? Multiple answers may apply.

Density is an intensive property

Solutions can be made from all states of matter

Solutions are heterogeneous mixtures

Copper is a pure substance, milk is a homogeneous mixture

Rubbing alcohol evaporating off your skin is a chemical change

2

Which of the following is a FALSE statement?

Density is an extrinsic property

A color change means a chemical reaction has occurred

By definition, an atom is the smallest particle of matter

Matter, mass and energy are conserved in a chemical reaction

Combustibility is a chemical change

2

Convert 198213.01 cm^3 = _______________________kL. Sig Figs Matter! Show your work on scrap paper and submit at end of test.

2

Convert 89.120 g = ________________ ng. Sig Figs Matter! Show your work on scrap paper and submit at end of test.

2

Convert 0.09173 m^3= ______________ mm^3. Sig Figs Matter! Show your work on scrap paper and submit at end of test.

2

Convert 51.2 x 10^7 Gm = ____________km. Sig Figs Matter! Show your work on scrap paper and submit at end of test.

2

Convert 0.689 cm^2= ________ dm^2. Sig Figs Matter! Show your work on scrap paper and submit at end of test.

2

Put the following in proper scientific notation: 0.000000420 x 10^5. Sig Figs Matter!

2

Put the following in proper scientific notation: 220000.0 x 10^-12. Sig Figs Matter!

2

Put the following in proper scientific notation: 12.80 x 10^3. Sig Figs Matter!

2

Put the following in proper scientific notation: 97000000.0. Sig Figs Matter!

2

State whether the following is an atom, element, compound and/or molecule. You can have more than one response: 2 CO

Compound

Element

Atom

Molecule

2

State whether the following is an atom, element, compound and/or molecule. You can have more than one response: 6 Fe

Atom

Element

Compound

Molecule

2

State whether the following is an atom, element, compound and/or molecule. You can have more than one response: 9 O2

Element

Atom

Molecule

Compound

1

How many significant figures are in the following? 210000 g

1

How many significant figures are in the following? 0.013400 L

1

How many significant figures are in the following? 8.0 x 10^-1

3

Perform the following calculation and follow sig fig rules for your answer: 5000 g/ 20.0 mL

3

Perform the following calculation and follow sig fig rules for your answer: (6.09 x 10^3 m) (0.0120 dm)

3

Perform the following calculation and follow sig fig rules for your answer: 0.817 g + 21.8920 mg + 12 kg = _____

6

Using the data table above, fill in the unknown values missing. Follow sig fig rules for each column. Show your work on scrap paper for submission at end of assessment.
Trial 3- Mass of Graduated Cylinder=
Trial 1- Mass of Unknown=
Trial 2- Mass of Unknown=
Trial 1- Density=
Trial 2- Density=
Trial 3- Density=