gathering and reporting quantitative data

Question 1

refers to the measurements of a particular characteristic, variable, which may be classified as quantitavie or qualitative

Answer 1

Data

Question 2

Values are assigned to a descriptive category

Answer 2

Qualitative

Question 3

Values are described on a numerical scale.

Answer 3

Quantitative

Question 4

may be independent or dependent

Answer 4

Variable

Question 5

The degree of agreement between the measured value and the true value. It is also limited by the precision of the instrument being used

Answer 5

accuracy

Question 6

of sig figs.

1. 20.0000
2. 3.50 x 10²
3. 0.20450
4. 0.00034
5. 3:00 pm
6. 55000
   7.8100
7. 10 x 10³
8. 6295857291
   10.0.000047203732

Answer 6

1. 6
2. 3
3. 5
4. 2
5. none
6. 2
   7.2
7. 1
8. 10
9. 8

Question 7

signifies the smallest quantity that the instrument could be sensitive to or is able to detect.

Answer 7

Precision

Question 8

Formula for Precision

Answer 8

= Smallest Calibration/2

Question 9

Formula in getting the Smallest calibration

Answer 9

= difference between any 2 scales/No. of divisions

Question 10

A convenient way of expressing very large and very small numbers

Answer 10

Scientific Notation

Question 11

determine the precision
1. 10 mL graduated cylinder
2. 100 mL graduated cylinder
3. thermometer

Answer 11

1. 0.01 mL
2. 0.1 mL
3. 0.1 °C

Question 12

Who invented the bunsen burner

Answer 12

Robert Bunsen

Question 13

Main purpose of Bunsen Burner

Answer 13

to obtain a combustible gas-air mixture that yields hot, efficient flame

Question 14

the Gas used as fuel for the Bunsen burner

Answer 14

Natural Gas (chiefly Methane CH4)

Question 15

what do u call combustion where enough amount of oxygen goes through the burner

Answer 15

Complete combustion

Question 16

What type of flame represents complete combustion

Answer 16

non-luminous flame

Question 17

color of the flame in a complete combustion

Answer 17

Blue

Question 18

Type of combustion where oxygen is insufficient for the burning of the natural gas

Answer 18

incomplete combustion

Question 19

type of flame representing incomplete combustion

Answer 19

Luminous flame

Question 20

color of flame in an incomplete combustion

Answer 20

Yellow

Question 21

Supports the burner

Answer 21

base

Question 22

Regulates the air intake

Answer 22

Collar

Question 23

Where the mixing of oxygen and fuel gas occurs

Answer 23

barrel

Question 24

passageway of oxygen

Answer 24

Air hole

Question 25

Passage way of fuel gas

Answer 25

Gas spud

Question 26

Which flame produces more heat per given time

Answer 26

blue non-luminous flame

Question 27

what kind of flame is more economical? why?

Answer 27

non luminous because it produces more heat per given time, thus it lessens the gas consumed/intake

Question 28

molar ratio of oxgen gas to methanrle gas in a complete combustion

Answer 28

2:1

Question 29

molar ratio of oxgen gas to methanrle gas in an incomplete combustion

Answer 29

3:2