Moonpark College » Chemistry » Chem R110 - Elementary Chemistry » Spring 2021

Which is a pure substance?

Which of the following items is a pure substance?

Add: 3.604 m + 104.29 m + 3.1 m + 17.41 m. The sum expressed in the correct number of significant figures is ___.

Divide: 3.724 × 10-3 by 2.46 104. When expressed properly the result is ___.

Which of the following is considered a hypothesis (as opposed to an observation)?

The correct prefix for the multiplier 0.000001 is:

Which of the following is NOT an example of matter?

How many significant digits should be reported in the answer to the following calculation? (4.3 - 3.7) × 12.3 =

How many liters are in 333 mL?

A temperature of 100. K is equal to which Celsius temperature?

Convert 4.34 yds to centimeters.

Given the following list of densities, which materials would float in a molten vat of lead provided that they do not themselves melt? Densities (g/mL): lead = 11.4, glass = 2.6, gold = 19.3, charcoal = 0.57, platinum = 21.4.

Which has both a definite shape and definite volume?

How many cm3 are there in 1.25 ft3?

How many zeroes are significant in the number 40400302?

When the value 4.449 is rounded to two significant figures, the number should be reported as:

An empty graduated cylinder has a mass of 68.00 g. 50.0 mL of liquid is added to the cylinder and its mass increases to 109.5 g. What is the density of the liquid?

At room temperature the majority of metals exist as ___.

Express the number 5.00 × 10-2 in decimal notation.

Which element is malleable, ductile, and a good conductor of electricity?

K is the symbol for the element ___.

Cr is a member of which family?

Which symbol represents a transition metal?

Under normal conditions, all diatomic elements exist as gases.

Consider the chemical formula for one unit of aluminum sulfate, Al2(SO4)3. How many total atoms would be present in 22 units of aluminum sulfate?

An example of a physical property is:

Which of the following is a physical change?

Which type of energy is associated with position?

The specific heat of aluminum is 0.900 J/g ºC. How much energy is required to heat 45.0 g of aluminum from 20.0 ºC to 50.0 ºC?

A 400.0 g metal bar requires 6.446 kJ of energy to change its temperature from 18.0 ºC to 95.0 ºC. What is the specific heat of the metal?

Chem R110 - Elementary Chemistry » Spring 2021 » Exam 1

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