Sig Figs
How many sig figs are in the number 206?
Three!
What is 700 in scientific notation?
7.0 x 10^2
Convert 1 gram to miligrams
1000 or 1x10^3 mg
Is melting aluminum a physical or chemical change?
Physical
If an object is moving what type of energy is being used?
Kinetic energy
How many sig figs are in the number 7690.00
Six!
What is 9.3 x 10^5 in standard notation?
930000
Convert 6500 nanometers (nm) to micrometers (um)
6.5 micrometers (um)
The ocean falls under what classification of matter?
Heterogenous mixture
If you're not sure a reaction has taken place, what is one thing you can look for?
Loss/gain of heat
How many sig figs does 0.0667728000 have?
Nine!
What is 0.0025 in scientific notation?
2.5 x 10 ^-3
1 pound = 16 ounces, how many pounds are in 435 ounces?
27.1875
A liquid!
Convert 600 J to calories (little c)?
143.403 calories
What is the answer with the correct amount of sig figs-- 09.3/1.40=?
6.64
What is 1.6 x 10 ^-2 in standard notation?
0.016
Convert 0.05 km to cm
5000
If a substance is chemically combined in a standardized ratio, what classification of matter does it fall under
pure substance/ compound/ element
ex: H2O
What is the specific heat of an element if 5g of the element going from 100C to 50C released -100J of heat?
*Look at givens and needs
0.4 J/g C
What is the answer with the correct amount of sig figs? -- 7+4.5-2.3
9
What is (2x10^3) x (4x10^-4) in standard notation
0.8
How many mL are in 6 cm3?
6 mL!!
Convert 53 F to Kelvin
284.816 K
How many calories are released in a reaction of 12 g of an substance that was heated from 76C to 86C, with a specific heat of 15.6 J/g C
*Make sure to convert!
447.42 calories