Reply to thread

Message

<blockquote data-quote="Andy" data-source="post: 2138551" data-attributes="member: 210983">I have a chemistry test coming up and heres a practice test I know how to do some of the problems but I just wanted to make sure I got them right. So please just answer them showing how you got the answers!! I really want to pass my test thanks! And all the &quot; meaning to the power of.Rewrite each of the following numbers to four significant digits and express in scientific notation1A. 72187.21B. 7.6 x10&quot;-2&nbsp;&nbsp; &lt;---- 10 to the power of negative 21C. 319.151D. 35.60502A. 10.000 + 0.000232 + 486.0905 + 1.2302B. 35.21 - 2.0022C. 44.20 X 0.00566722D. (6.022 x 10&quot;23) x 96.62 x 10&quot;-34)&nbsp; &lt;--- power of 23 and +343A. 4.12kg to g3B. 1316 mg to kg3C. 0.035 mL to L4.What is the volume, in liters occupied by 5.0. kg of ethanol of 20.0 *C? The density of ethanol at 20.0*C is .0789 g/cm&quot;35. Use the follwing conversion factores to solve the conversion below.1gal = 4 qt1qt = 2 pt&nbsp;1 L = 1.06 qt1 lb = 16 oz1 lb = 453.6g1m = 39.37 in1 ft = 12 in1 mile = 5280 ft1 in = 2.54 cm5A. 5.2 pt to L5B. 898m to miles5C. 0.900 kg to lb6. An irregularly shaped glass vessel is weighed when empty (121.31g) and again when filled with carbon tetrachloride (283.27 g). What is the volume of the vessel if the density of carbon tetrachloride is 1.59 g/mL?7. A squre piece of aluminum foil is 20.42 cm on each edge. The foil is found to weigh 1.863g. If the density of the foil is 2.70 g/cm&quot;3, what is the thickness of the foil? (Note: volume = length x width x height)Once again thanks for your help !! Really appreciate your time to help me out for my upcoming test !Please teach me how to do each problem I want to make sure that I fully understand it !</blockquote>

[QUOTE="Andy, post: 2138551, member: 210983"] I have a chemistry test coming up and heres a practice test I know how to do some of the problems but I just wanted to make sure I got them right. So please just answer them showing how you got the answers!! I really want to pass my test thanks! And all the " meaning to the power of. Rewrite each of the following numbers to four significant digits and express in scientific notation 1A. 72187.2 1B. 7.6 x10"-2 <---- 10 to the power of negative 2 1C. 319.15 1D. 35.6050 2A. 10.000 + 0.000232 + 486.0905 + 1.230 2B. 35.21 - 2.002 2C. 44.20 X 0.0056672 2D. (6.022 x 10"23) x 96.62 x 10"-34) <--- power of 23 and +34 3A. 4.12kg to g 3B. 1316 mg to kg 3C. 0.035 mL to L 4.What is the volume, in liters occupied by 5.0. kg of ethanol of 20.0 *C? The density of ethanol at 20.0*C is .0789 g/cm"3 5. Use the follwing conversion factores to solve the conversion below. 1gal = 4 qt 1qt = 2 pt 1 L = 1.06 qt 1 lb = 16 oz 1 lb = 453.6g 1m = 39.37 in 1 ft = 12 in 1 mile = 5280 ft 1 in = 2.54 cm 5A. 5.2 pt to L 5B. 898m to miles 5C. 0.900 kg to lb 6. An irregularly shaped glass vessel is weighed when empty (121.31g) and again when filled with carbon tetrachloride (283.27 g). What is the volume of the vessel if the density of carbon tetrachloride is 1.59 g/mL? 7. A squre piece of aluminum foil is 20.42 cm on each edge. The foil is found to weigh 1.863g. If the density of the foil is 2.70 g/cm"3, what is the thickness of the foil? (Note: volume = length x width x height) Once again thanks for your help !! Really appreciate your time to help me out for my upcoming test ! Please teach me how to do each problem I want to make sure that I fully understand it ! [/QUOTE]

Name

Verification

Loading…