Convert the following numbers from one form to another and explain your answer.
1.) 5.38 x 10-3 = _____________
2.) 623000000. = _____________
Complete the following conversions and show all work. Be sure to write your answer with the correct units.
1.) 25.3 g = __________ decigrams
2.) 56 ft = __________ in
1.) 85 oF = ___ oC
2.) 412 oK = ___ oF
Complete the following problems and show all work. Be sure to show the correct number of significant figures in each calculation and answer with the correct units.
1.) What is the volume of a sample of mercury (d = 13.6 g/ml) which weighs 1000. g?
2.) What is the density of 200. ml of bromine which weighs 620. grams?
Complete the following problems and show all work when necessary. Be sure to show the correct number of significant figures in each calculation and answer with the correct units.
How many significant figures are there in each of the following numbers?
1.) 306.2
2.) 0.0231
3.) What is the mass of a sample of lead (d = 11.35 g/ml) which has a volume of 85.0 mL?
Describe each material below as an element, compound, solution or heterogeneous mixture and explain your answer.
1.) Sea water
2.) Aluminum
3.) Potassium bromide
4.) Vodka
5.) Raisin bread
Classify the following as physical or chemical changes:
1. A pile of leaves is burned
2. Your hair is trimmed by a hairstylist
3. Flour, water, eggs, butter and sugar are combined and baked to make a cake
Name the following compounds:
1.) Fe(OH)3 ____________________
2.) MgCO3 ____________________
3.) PF5 ____________________
4.) HNO2 ____________________
Write the formula for each of the following chemical compounds below and then explain your answer by referring to the prefixes or suffixes or showing charges that were used to determine the formula.
1.) Aluminum sulfide _______________
2.) Lead (IV) oxide _______________
3.) Calcium cyanide _______________
4.) Dinitrogen Trioxide _______________
5.) Potassium bromide _______________