CHEM 140 - OSU

Conversion factor for joules to calories

4.184 J/ per calorie

Prefixes that increase the size of a unit?

peta, tera, giga, mega and kilo

Distance

rate x time

Unit of measurement for time

seconds for both (s)

ρ

the lower case Greek letter rho - symbol for density

How many conversion factors are always available from any equality?

two

Calculate volume of a prism?

volume=width*height*length or volume=base*h Example: 2.1*6.6*5.6=78cm^3

At what temperature does water freeze and boil in Fahrenheit (F)? (temperature scale)

water freezes at 32 degrees F and boils at 212 degrees F

micro (u or mcg in medicine)

0.000001 or 10^-6

milli (m)

0.001 or 10^-3

centi (c)

0.01 or 10^-2

deci (d)

0.1 or 10^-1

Volume conversion from Litre (L) to quart (qt)

1 L = 1.06 qt

Volume conversion from Litre (L) to millilitre (mL)

1 L = 1000 mL

Pints to millilitres

1 Pint = 473 mL (473mL/1P) or (1P/473mL)

Equality of dL to mL

1 dL = 100 mL = 1 x 10^2 mL

Grams to Milligrams

1 gram to 1000 milligrams 1 milligram=10^−3 grams, you can enter your answer as 5×10^−3 g or 5 mg.

Equality of mass of kg to grams

1 kg = 1000 g = 1 x 10 ^3g

Conversion for 1 kg to grams (g)

1 kg=1000g

Length conversion from meter to yard

1 m = 1.09 yd

Metres to Centimeters

1 m = 100 cm (100cm/1m) or (1m/100cm)

Length conversion from meter to inch

1 m = 39.4 inches

Equality of mass of milligrams to micrograms (mcg or ug)

1 mg = 1000mcg/ug

pico (p)

10^-12

femto (f)

10^-15

nano (n)

10^-9

tera (T)

10^12

peta (P)

10^15

kilo (k)

10^3 or 1000

mega (M)

10^6 or 1,000,000

giga (G)

10^9

Normal blood pressure

120/80 or below

Equality of litre to decilitre

1L = 10 dL = 1 x 10^1 dL

Equality of litre to millilitre

1L = 1000mL = 1 x 10^3mL

Equality of mass of grams to milligrams (mg)

1g = 1000 mg = 1 x 1^3mg

Conversion for 1 kilogram (kg) to pounds (lb)

1kg = 2.20 lb

Length conversion from meter to centimeter

1m = 100 cm

Metre to millimeter

1m = 1000mm (1000mm/1m) or (1m/1000mm)

What is the relationship between millimetres and micrometres (um)

1mm = 1000um (mcm)

How many centimetres are in a length of 1 inch?

2.54 cm

Length conversion from centimeter to inch

2.54 cm = 1 inch

Conversion from grams (g) to pounds (lb)

454 g = 1lb

How many millilitres are in 1 quart

946 mL

Volume conversion from millilitre (mL) to quart (qt)

946 mL = 1 qt

Weight

A measure of the gravitational pull on an object.

Mass

A measure of the quantity of material contained.

What is a significant figure (SF)?

All the digits including the estimated digit. Non zero numbers are always counted as significant figures.

Conversion factor

An equality can be written as a fraction with one of the quantities in the numerator and the other quantity in the denominator

Hypothesis

An unverified explanation of a natural phenomenon. Must be testable.

What is a litre (L) divided into 10 equal portions?

Decilitre (dL)

Find the area of a rectangle?

Example 2: A rectangle has a length of 8 centimeters and a width of 3 centimeters. Find the area. Solution: A = L x W A = (8 cm) · (3 cm) = 24 cm2

Calorimetry

Experimental technique for measuring heat given off or absorbed when a chemical reaction is carried out under carefully controlled conditions.

Conculsion

Explanation of an experiment that has been validated by repeated experiments to test a hypothesis.

Observation

First step: Information determined by noting and recording natural phenomenon

Calculate Torque?

If a lever has a constant force applied at 90∘ to the lever arm at a fixed distance from the pivot point (point of rotation), the torque on the lever is given by torque = force (at 90∘ to lever arm) × distance to pivot point

SI system temperature scale

Kelvin lowest temperature is 0 K. A unit on the Kelvin scale is called a kelvin (K) and is not written with a degree sign.

Unit of measurement for volume in Metric and SI

Metric = Litre (L) SI= Cubic Metre (m^3)

At what temperature does water freeze and boil in Celsius? (temperature scale)

Metric system - water freezes at 0 degrees Celsius and and boils at 100 degrees Celsius

Unit of measurement for temperature

Metric= degrees Celcius (C) SI=kelvin (K)

Unit of measurement for mass in Metric and SI

Metric= gram (g) SI=kilogram (kg)

Find the Perimeter of a Triangle?

P = 2L + 2W, where P is the perimeter, L is the length and W is the width. The perimeter of a two-dimensional shape is the distance around the outside edge of the shape. In the case of a rectangle, there are two sides of length L and two sides of width W. Therefore, if you were to walk around the outside of a rectangle, you would walk a distance of 2L+2W or 2(L+W).

equalities

Show the relationship between two units that measure the same quantity.

Molecular formula of butane vs. condensed structural formula

Some questions may ask you to enter the condensed structural formula of a compound instead of a molecular formula. -A condensed structural formula reveals how the atoms are bonded together without explicitly showing the bonds, whereas a molecular formula shows only the number of each type of atom. For example, the butane molecular formula and condensed structural formula in this part can be represented as follows: Molecular formula - C4H10 Condensed structural formula - CH3CH2CH2CH3

Temperature

Tells us how hot something is, how cold something is, or helps us determine if we have a fever.

Experiment

Tests the validity of the hypothesis

Volume

The amount of space a substance occupies.

Find the Area of a Triangle?

The area A of a rectangle is given by the product of its length L and width W: A=L⋅W. Or A=1/2 Base*Height

What happens for significant figures in multiplication and division?

The final answer is written so that it has the same number of significant figures (SFs) as the measurement with the fewest SFs.

Find the Perimeter of a Square?

The perimeter of a square is the sum of the lengths of all four sides of the square. Because a square has four sides of equal length, the perimeter is 12 m+12 m+12 m+12 m=48.0 m You could also express the perimeter in equivalent units using prefixes such as cm or km (i.e., 4800 cm or 0.0480 km)

Scientific Method

The process of making observations, proposing a hypothesis, testing the hypothesis, and making conclusions as to the validity of the hypothesis

What is an exact number?

Those numbers obtained by counting items or using a definition that compares two units in the same measuring system.

Define Torque?

Torque, moment, or moment of force (see the terminology below) is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist to an object. Mathematically, torque is defined as the cross product of the vector by which the force's application point is offset relative to the fixed suspension point (distance vector) and the force vector, which tends to produce rotation.

Prefixes that decrease the size of a unit?

deci, centi, milli, micro, nano, pico and femto

Equation for computing speed?

if an object is moving with constant speed, its speed is given by speed=distance/time You can enter your answer in any equivalent combination of SI units representing a distance over any period of time. For example, you could also enter 21 m/s using two significant figures. Significant Figures Feedback: Your answer 75km/h(=2.083×10^−2 km/s) was either rounded differently or used a different number of significant figures than required for this part.

Cubic centimetre (cm^3 or cc)

is the volume of a cube who dimensions are 1cm on each side. A cubic centimetre is the same volume as a millilitre, and the units are often used interchangeably. 1cm^3 (volume) = 1cc (volume)= 1 mL (volume)

Laboratory results for blood work are often reported in?

mass per deciliter

Density

mass/volume

Unit of measurement for length in Metric and SI

meter for both (m)

What is a litre divided into a thousand parts?

millilitre (mL)

The weight of an object? Gravity, g (where g=9.8 m/s2). If an object's mass is m=10. kg, what is its weight?

multiply its mass by the acceleration due to gravity: weight = mass of object ⋅ acceleration due to gravity Because you are multiplying a value with the units kg by a value with the units m/s2, find the resulting units by multiplying both units together: (kg)⋅(m/s2) = kg⋅m/s2 The weight of the object is m⋅g=98 kg⋅m/s2. Because 1 kg⋅m/s2 = 1 N (1 newton), you can also express the answer as 98 N, in scientific notation as 9.8×101 N, or with a prefix as 0.098 kN.