Sig Figs
What is one way to figure out Sig Figs?
- All final zeros to the right of the decimal is significant
- Any number between 2 sig Figs are signifcantt
Placeholder Zeros are not sig
Is Density a CHEMICAL or PHYSICAL PROPERTY of what?
Density is a PHYSICAL property of MASS
45,000
4.50 x 104
7.15 x 10-3
0.00715
Def: When 2 or more atoms bond together, the atoms can be the same or different
Example: CO2
How many Sig Figs does this number have?
3 sig figs
(6) (2) (0)
(0 is a sig fig for being a final zero to the right of the decimal)
What is the formula of Density?
(Contains Volume and Mass)
MASS/VOLUME = Denisty
Mass divided by Volume
5,400,000
5.4 x 106
3.4 x 104
34000
What part of the lab report is this?
"This study investigated the effects of varying temperature and pH levels on the catalytic activity of the enzyme catalase extracted from Solanum tuberosum. The primary objective was to determine the optimal environmental conditions for maximum hydrogen peroxide decomposition. Reaction rates were quantified by measuring the volume of oxygen gas produced over a standardized time interval using micro-respirometers. The results indicate that catalase activity peaked at a temperature of 37°C and a neutral pH of 7.0. Extreme deviations, such as temperatures exceeding 60°C and a pH below 4.0, resulted in a near-total loss of enzymatic function, likely due to protein denaturation. These findings demonstrate that enzyme efficacy is strictly dependent on maintaining specific conformational parameters congruent with physiological environments. Understanding these functional boundaries highlights the vulnerability of biological catalysts to environmental stress."
Abstract
Add these and round to the smallest amount of Sig Figs:
7.4 + 0.152 + 1.2235
1.4 (7.4 has the smallest sig figs)
A 1cm3 sample was taken and weighed 1200 mg.
Find the Bone Denisty of the patient
1200 mg/cm3
How do you convert measurements from Standard to Scientific Notation?
There are two steps
Prize: Naming at least one will earn homemade stickers of any character. Both = two homemade stickers
1. Move the decimal place untilyou have a number between 1-10
2. The number of decimal place you have move is the exponent number
How do you convert measurements from Standard to Scientific Notation?
There are two steps
Prize: Naming at least one will earn homemade stickers of any character. Both = two homemade stickers (Again)
1. Look at the number in your exponent's place
negative -> left
positive -> right
2. Move the decimal place equal to the number in the exponents place
Figure out how many atoms of this element:
4H2O
____ hydrogen, ____ oxygen
8 hydrogen, 4 oxygen
0.004500
4 sig figs
What is the density if a 2.5 cm cube of bone weighs 8.75 g?
Convert the grams to milligrams: 1 gram = 1000 milligrams
Formula for cube: length x weight x height
Prize: Hololive Pack
560 mg/cm3
0.00003218
Convert this to Scientific Notation
Remember:
left = positive
right = negative
3.218 x 10-4
0. 0 0 0 3 *.*218
(Decimal jumps to the right 4 times which makes it negative)
4.235 x 10-2
40.35
Which part of the lab report is a section where it states the ending result with evidence
Discussion/Conclusion
4.02050
Prize: LILIA
6 sig figs
What is the density if the length of the DIAPHYSIS SAMPLE is 12 cm, the diameter is 5.8 cm and the mass of the sample is 20 g?
Prize: SILVER DOLL
60 mg/cm3
0.00000001
1.00 x 10-8
6.02214076 x 10-19
What are the three different states of matter and give me a short def
Solid - has its own definite shape & Volume/ will not take shape of container
Liquid - that flows/has a constant volume and takes shapes of container
Gas - filles the entire volume of container