Chapter 1 & 1a

Which of the following statements concerning accuracy and precision is/are correct? 1.It is possible for a series of measurements to be both precise and inaccurate. 2.Accuracy is a measure of how close multiple measurements are to each other. 3.The more the number of significant figures in a measurement, the more accurate the measurement. 1 only 2 only 1 and 2 2 and 3 1, 2, and 3

1 only

Which response has the correct number of significant figures and units for the following mathematical operation? 1.953 × 10-5 J/cal 2 × 10-5 kcal 1.953 × 10-5 kcal 1.95 × 10-5 kcal 2.0 × 10-5 kcal

1.95 × 10-5 kcal

Which is the largest mass? 10 dg 10 pg 10 cg 10 mg 10 ng

10 dg

Three different samples were weighed using a different type of balance for each sample. The three were found to have masses of 0.8493720 kg, 8.476 mg, and 3792.7 g. The total mass of the samples should be reported as 4642.1 g. 4642 g. 4642.080 g. 4642.080476 g. 4642.0805 g.

4642.1 g.

The number of significant figures in 5.6496 × 10-2 cm is _____. 5 6 3 7 4

5

What is the symbol for the element iron? Fe Kr Kr Kr Kr

Fe

Instructions: Use the pictures below to answer question Which of the above figure represents a mixture of two elements? Figure A Figure B Figure C Figure D Figure E

Figure D

What is the difference between the accuracy of measurements and the precision of measurements?

accuracy is for how on target it is, precision is if the results are the same every time.

The law of ________ states that the total energy of the universe is constant.

conservation of energy

Which of the following is not a mixture? sea shells ice cream gasoline wine diamond

diamond

Potential energy possessed by water at the top of a waterfall is known as ________ energy.

gravitational

A mass of 10 g of table salt dissolves in water to form a(n) ________ mixture (i.e., a mixture that is uniform throughout).

homogeneous

An intensive property of a substance is independent of the amount present. dependent on its volume, but not its mass. not affected by its temperature. dependent only on its temperature. dependent only on its mass and volume.

independent of the amount present.

A hypothesis is a _____. concise statement of behavior that is always the same under the same conditions set of quantitative data tentative explanation or predication based upon experimental observations well-tested unifying principle that explains a body of facts mathematical formula that models a pattern of behavior

tentative explanation or predication based upon experimental observations

All of the following are examples of intensive properties of matter except _____. boiling point thermal conductivity malleability the amount of energy transferred as heat color

the amount of energy transferred as heat

The element whose symbol is Sn is tin. calcium. calcium. calcium. none of these.

tin.