Unit 1:
Intro to Chem
Intro to Chem
What is the SI base unit for mass?
Kilogram (kg)
What is the type of charge a proton has?
Positive
How many particles of a substance make up one mole?
6.02 x 1023
What is the name of C3F7?
Tricarbon heptafluoride
What is the name of the scientist who first proposed the theory of relativity?
Albert Einstein
If I have 2300 grams of carbon, how many kilograms of carbon do I have?
2.3 kg
This subatomic particle exists in a cloud outside the nucleus
Electron
How many liters are in one mole of gas @ STP?
22.4 L
What is the formula for sulfur pentachloride?
SCl5
What is the nearest galaxy to our home galaxy, the Milky Way?
Andromeda
Which of the following is not an SI unit?
Seconds, ounces, meters, liters
Ounces
Halogens
What is the empirical formula for the molecular formula C12H24O18
C2H4O3
What is the name of LiBrO3?
What is the most abundant element in the earth's crust?
Oxygen
How many centimeters are there in 0.1 kilometer?
10,000 cm
How many valence electrons does nitrogen (N) have? (It is in Group 15.)
5 valence electrons
What is the "molar mass" of a substance a measurement of (not just where to find the value)?
Mass of one mole of the substance.
What is the formula for magnesium oxalate?
MgC2H3O2
What natural disaster is caused by the shifting of tectonic plates?
Earthquakes
What is the value of the exponent on 10 when 0.0000826 is written in scientific notation?
-5
What is the term for atoms of the same element with different numbers of neutrons?
Isotopes
In a substance containing one mole of hydrogen and one mole of bromine, which element has the higher % composition by mass? Why?
Bromine. Higher molar mass.
What is the name of H2CO3
Carbonic acid
What is the name of the woman who took the photo of DNA that lead to the discovery of the double helix structure?
Rosalind Franklin