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chem final

exam 1

TermDefinition
how many sig figs in 0.02050 four
which of the following is metal? K- Potassium
the measurement 0.0000043 can expressed in scientific notation as: 4.3 time 10 to the neg 6
you want to give a patient 0.125 g of ampicilan. the liq. suspension of the drug is 250 mg per 5.0 mL of suspensions. how many mL of the suspension is required? 2.5 mL
carrots are 0.79 cents a pound. What is the cost of 1.2 kg of carrots? 2.10
Isotopes are atoms of the same element that have: the same atomic numbers but diff number of neutrons
How many mL of solution are there in 0.0250L? 25.0 mL
which of the following gives the correct numbers of protons, neutrons, and electrons in a neutral atom of 118Sn50? 50 protons, 68 neutrons, 50 electrons
which element would have physical and chemical properties similar to magnesium? Ca
What is the volume of 25.0 g of ethanol, which has a density of 0.79 g/mL 31.6 ml
A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. what is the density of the gold? 19.3 g/ml
If a scuba divers lungs have a normal capacity of 4.9 L at sea level (1 atm)what would be the volume of her lungs at a depth of 50 ft, if the pressure is 975 mmHg? 3.8L
Which subatomic particle contributes the least to the mass of the atom? the electron
which of the following contains only covalent bonds? PCl3
Calculate the molar mass of Mg3(PO4)2 mg- 3(24) + P 2(30( +O 8(16) =262.9
what is the symbol for an ion that has 26 protons and 23 electron Fe3+
How many electrons will aluminum gain or lose when it forms an ion? lose 3
The correct formula for the molecule formed from Ca and N is: Ca3N2
In a molecule with covalent bonding: atoms are held together by sharing electrons
how many valence electrons does carbon have: four
Sodium Sulfate Na2(SO4)
Calcium Carbonate CaCO3
Potassium nitrate K(NO3)
Sulfur Trioxide SO3
975 micro-grams is how many cm? .0975
200 mL is how many dL? 2 dL
a prescription for nifedipine: 2 capsules
given the molar mass of glucose C6H12)6 is 180.0 g/mol. whats the number of moles in 10.0 g glucose? 0.0555 moles
what is the number of grams in .50 moles of glucose? 90 g of glucose in .50 moles.
Created by: sarah.rushton298