chemistry

what us the differences between density and specific gravity

density is a unique property which relationship of its mass to its volume specific gravity is a number with no in its

why would heating the gas in the hot air balloon make the balloon rise

hot air is less than the colder are so the h air will rise

what do the small lines marked on the meter stick represent

millimeter

how does your value length compare to those of other students

my line was the same as most of the other measurements

how are positive and negative ions formed

negative electron formed by gain of a electron positive formed by the loss of a electron

what property of oil makes it float

oil is less dense than water. that is why oil floats

mass number - neutrons =

protons

initial number is 0.008 583 45

student round to 0.00858

initial number 143.63212

student round to 144

initial number is 532,800

student round to 533,000

initial number is 8

student round to 8.00

0.1184* 8.00 * 0.0345

the answer is 0.0327

(35.56)(1.45) -------------- (4.8)(0.56)

the answer is 19

(42.4)(15.6) ------------ 1.265

the answer is 523

indicate the estimated digit in each of the following measurements 42.50 g

the estimated digit is 0

indicate the estimated digit in each of the following measurements 4500 mi

the estimated digit is 0

indicate the estimated digit in each of the following measurements 42.231 g

the estimated digit is 1

indicate the estimated digit in each of the following measurements 0.0782 in

the estimated digit is 2

indicate the estimated digit in each of the following measurements 1.5 cm

the estimated digit is 5

indicate the estimated digit in each of the following measurements 8.07 IB

the estimated digit is 7

state the number of significant figures In each of the following measurements of 0.0004 l

the significant number of 0.004 l . there is one significant figures for 0.0004 L

state the number of significant figures in each of the following measurements 204.52 g

the significant number of 204.52 g . there five significant figures for 204.52 g.

state the significant figures in each of the following measurements 34.80 km

the significant number of 34.80 km . there are 4 significant figures in 34.80 km

state the number of significant figures In each of the following measurements 4.5 m

the significant number of 4.5 . there are two significant figures for 4.5

state the significant figures in each of the following measurements 625.000 mm

the significant number of 625.000 mm. the six significant figure 625.000 mm

state the number of significant figures in each of the following measurements 805 IB

the significant number of 805 IB there are 3 significant figures for 805 IB

where are the valence electrons in an atom

the valence of the electrons are on the outer shell

how do you find area of a object ?

you times the width and the length of the object

remember to put the estimate digit

zero is the estimate digit

conversion factors

1 ib 453g ------------------- 453g 1ib

conversion factors

1 in 2.54 cm ---------------------- 2.54 cm 1 in

a bottle of olive oil contains 1.4 qt of olieve oil. what is the that volume in milliliters

1.4 qt 946ml --------------------------======== 1324.82 1300 ml 946 mL 1 qt

there are millimeters (mm) in 1 centimeters (cm)

10

there are centimeters(cm) in 1 meter (m)

100

there are millimeters (mm) in 1 meter

1000

1 L = mL

1000 mL

addition 145.5 m + 86.58m + 1045 m

1277 mL

addition 13.45 mL + 0.4552 mL

13.91 mL

a pencil is 16.2 cm long . what is it length in inches ?

16.2 cm ---------- ==== 6.38 in 2.54in

245.625 g - 80.2 g

165.4 g

an object has a mass of 18.4 g and a volume of 11.2 mL what is the density of the object density = mass divide volume

18.4 g ============ 1.64 g/ml 11.2 ml

your height 67 in height in cm is 170 height in mm is 1.7

1in 67 in 2.54 in ------------------------------ ====== 170.18 2.54 cm in 1 in

how do you find the volume of an cube

2.5 cm * 2.5 cm * 2.5 cm ^3

4.62 cm - 0.885 cm

3.74 cm

a person has the mass of 63.2 kg what is that weight in pounds ?

63.4 kg 2.205 IB -------------------------=========139.797 ==== 140.IB I 1 kg

a neutral atom has a mass number of 80 and 45 neutrons write the atomic symbol

80-45= 35

true equality 1 qt = mL

946 mL

conversion factors

946mL 1 qt ------- -------- 1 qt 946 mL

number of milliliters I 1 qt

962 mL in 1 qt

what units are represented by the numbers marked on the meter stick

centimeters