Nursing Chemistry 101.01 EXAM 1
(4.66x10^-3) x 4.666
.0217
0.007222 to 3 significant figures
0.00722
0.829 to 2 significant figures
0.83
Scientific Notation:10058
1.0058x10^4
2221.05- (3256.5/3.20)
1.20x10^3
4.850-2.34/1.3
1.9
128 mg/mL to g/L
128 g/L
6.30 in to cm
16 cm
How many sig figs? 0.00012 g
2
2.285 to 2 significant figures
2.3
(i) Calculate the density of a solution in g/mL that has a mass of 870 g and a volume of 25 dL.
25 dL to mL 25dL× 1L ×1000mL=2500mL 10dL 1L density=m= 870g =0.348g=0.35g/mL v 2500mL mL
Al(𝑠) + HCl(𝑎𝑞) ⟶ AlCl3(𝑎𝑞) + H2(𝑔)
2Al(𝑠) + 6HCl(𝑎𝑞) ⟶ 2AlCl3(𝑎𝑞) + 3H2(𝑔)
How many sig figs? 1.20 kg
3
How many sig figs? 2.10x10^5 m
3
Scientific Notation:0.00345
3.45x10^-3
Calculate the mass of sugar in 250 g of a mixture that contains 35 mass percent sugar.
35%= 35/100 massofsugar=250g× 35 =87.5g 100
How many protons and neutrons are in Br?
35, 45
NH3(𝑔) + O2(𝑔) ⟶ NO(𝑔) + H2O(𝑙)
4NH3(𝑔) + 5O2(𝑔) ⟶ 4NO(𝑔) + 6H2O(𝑙)
1.45x10^4 kcal in J would be
6.07x10^7 J
What is the group number and period number for sulfur?
6A, 3
8.75 x 10^-5 km to mm
87.5 mm
Which of the following has the largest mass? A. 25 kg B. 250 g C. 2.5x10^3 mg D. 2.5x10^10 ng
A. 25 kg
Which of the following has the highest temperature? A. 40 C B. 102 F C. 302 K D. freezing point of water
A. 40 C
Silicon has 3 naturally occurring isotopes, 28Si (27.977 amu), 29Si (28.976 amu), and 30Si (29.974 amu). Use the atomic weight in the periodic table to find which isotope is more abundant. Explain (1-2 sentences) how you came up with your answer.
Atomic mass of Si is 28.09 amu. It is closer to 28 than to 29 or 30. So 28Si is the most abundant isotope.
C4H8(𝑔) + O2(𝑔) ⟶ CO2(𝑔) + H2O(𝑙)
C4H8(𝑔) + 6O2(𝑔) ⟶ 4CO2(𝑔) + 4H2O(𝑙)
CaH2 +H2O → Ca(OH)2 + H2
CaH2 +2H2O → Ca(OH)2 + 2H2
A pure substance containing more than one element
Compound
Which of the following correctly pairs an element with its group? A. Magnesium is an alkaline earth metal B. Bromine is a halogen C. Argon is a noble gas D. All of the above
D. All of the above
Which of the following has the element name and symbol correctly matched? A. Ne- nitrogen B. Si- sulfer C. Ca- carbon D. Be- beryllium
D. Be-beryllium
What is the physical state in which matter has a specific volume but not a specific shape?
Liquid
Will this syrup drop to the bottom or stay on the top of a glass of water when poured?
The syrup will stay on the top because it is less dense than water.
Most of an atom's mass is in the nucleus
True
A simple syrup has a specific gravity of 0.89. (density of water is 1.00 g/mL) A). Calculate the density of the syrup.
specific gravity = density of sample density of water density of sample = specific gravity × density of water = 0.89 × 1.00 g = 0.89 g/mL mL
A 1000 mL of D5W has been ordered to run over 12 hours. The drop factor is 10 gtt/mL. Calculate the drip rate in drops per minute (gtt/min).
unit of the final answer: gtt/min Given information: 1000 mL, 12 h, 10 gtt/mL 10gtt×1000mL× 1 × 1h =13.89 gtt =10gtt/min 1mL 12h 60min min
A nurse has ordered 14.0 g of Dilantin. The drug is available in 0.0060 kg/10.0 mL. How many mL of Dilantin should the nurse administer?
unit of the final answer: mL Given information: 14.0 g, 0.0060 kg/10.0 mL drug availability 10.0mL ×14.0g× 1kg =23mL 0.0060 kg 1000 g