unit 1 chem h

When do we use scientific notation

For really big and really small numbers

What are the rules for scientific notation

Coefficient has to be between 1 and 10

Positive exponent indicated big numbers

Negative exponent indicates small number

Can i add and subtract scientific notations if the powers of 10 are the same?

Yes

What’s the rule for multiplying scientific notations

Multiply the coefficient and add the exponents

What’s the rule for diving scientific notations

Divide the coefficients and subtract the exponents

What’s makes a good graph

Title

X and y axis

Which axis is the dependent variable

X axis

What is a dependent variable

What changes as an affect of what i set up

What is an independent variable

Set up by the experimenter

Systeme international

Scientific form of the metric system, a standardized set of units used universally by scientists

What are the SI base units

Mass, temp, time, length, amount of substance

What is mass measured in

Kg

What is temp measured in

Kelvin

What is time measured in

Seconds

What is length measured in

Meters

What is amount of substance measured in

Mole

Volume

M³, liter, L

Pressure

N/m², pascal, Pa

Force

M x kg x s-²

Concentration

Mol/L, molarity, M

Density

Kg/m³, n/a, g/cm³ for liquid or g/cm² for solid

Energy

N x m, joules, J

Power

J/s, watts, W

Frequency

S to the -1, hertz, Hz

TERA

10^12

GIGA

10^9

MEGA

10^6

KILO (IMPORTANT)

10³

HECTO

10²

DEKA

10^1

DECI

10^-1

CENTI

10^-2

MILLI

10^-3

MICRO

10^-6

NANO

10^-9

PICO

10^-12

How many inches are in 3 feet EXAMPLE

Given/1 x conversion(same unit as final)/factor (same unit as given) = answer

What is the formula for density?

Mass/volume

What is NOT significant

1) leading zeroes with a decimal (0.00123)

2) trailing zeroes without a decimal (10,000)

What IS SIGNIFICANT

1) all non-zero numbers (1,234)

2) zeroes between non-zeroes (10,015)

3) trailing zeroes with a decimal (100.00

4) all numbers in the coefficient of scientific notations

Inexact number

Rounded number found with the use of an instrument

Exact number

A quantity that can be counted

What is the rule of sig figs for adding and subtracting

The answer must have the same number of decimal places as the least precise measurement

What is the rule of sig figs for multiplying and dividing

The answer must have the same amount of sig figs as the smallest amount in the problem

Accuracy

A measurement that is close to the actual value

Precision

A measurement that is close to a set of other measurements

Human/ random error

Measured values were simply mistaken

Systemic error

The instrument used is defective

What is the formula for percent error

% error = /actual value-measured values/actual value x 100/

Good luck!

Thanks 😋