Science Midterm 1-1

Which of the following explanations best fits the data?

• Sugar was dissolved in water.

• Two solutions were mixed and formed a precipitate.

• A solid was strongly heated.

• Alka-Seltzer was dissolved in water.

Which of the following explanations best fits the data?

• Sometimes the mass increases, sometimes it decreases.

• The reaction produced a gas which escaped from the vial.

• Several of the balances were misadjusted.

• A few groups were careless and lost material.

What is the rounded answer for 8.08 x 45.9 to the proper number of significant figures?

• 370

• 371

• 372

• 373

What is the rounded answer for 0.058 multiplied by 0.0007967 to the proper number of significant figures?

• 0.00008

• 0.000079

• 0.000080

• 0.000081

Convert 2.5 x 10^-4 g to milligrams.

• 0.25 mg

• 2.5 mg

• 25 mg

• 0.025 mg

How many kilometers are equivalent to 1.52 x 10^8 mm?

• 152 km

• 1.52 km

• 15.2 km

• 1,520 km

In a gas, how are the particles arranged?

• Far apart and not orderly

• Closely packed

• In a fixed pattern

• In layers

What is the conversion factor from milliliters to liters?

• 1 L = 1000 mL

• 1 L = 100 mL

• 1 L = 10 mL

• 1 L = 10000 mL

What is the conversion factor from millimeters to kilometers?

• 1 km = 1,000,000 mm

• 1 km = 100,000 mm

• 1 km = 10,000 mm

• 1 km = 1,000 mm

Write the equation of the line for substance B.

• mass = 8.53g/cm³ x volume + 0.023 g

• mass = 2.70g/cm³ x volume + 0.016 g

• mass = 5.00g/cm³ x volume + 0.010 g

• mass = 10.00g/cm³ x volume + 0.050 g