Test
C371 Unit 1
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Preguntas del test (30)
1One measure of solubility is concentration in grams per liter. What is the concentration of copper(II) ions, in grams per liter, measured in a 0.200 L sample of water in which 0.00026 g of copper(II) ions are present?
- A0.0013 g/L or 1.3 x 10^-3 g/L
- B770 g/L or 7.7 x 10^2 g/L
- C0.000052 g/L or 5.2 x 10^-5 g/L
- D0.00026 g/L or 2.6 x 10^-4 g/L
2Which of the following units is used to measure a different quantity than the other units?
- AInch
- BLightyear
- CCentimeter
- DSecond
3Which measurement best describes the amount of water in a home aquarium?
- A40 L
- B4 L
- C355 L
- D1.25 L
4Calculate the density of aluminum if 27.6 cm3 has a mass of 74.6 g.
- A2.70 cm3/g
- B0.370 cm3/g
- C2.70 g/cm3
- D0.370 g/cm3
5A particular laboratory thermometer provides readings that are consistently 0.6ºC less than the true value. Five measurements of the temperature of a well-stirred ice-water mixture were obtained with the thermometer. The measurements were -0.6ºC, -0.6ºC, -0.6ºC, -0.5ºC, and -0.6ºC. Select the option that correctly states whether the thermometer can be used to correctly determine the temperature change of a chemical reaction and states the correct reason.
- ANo, because measurements made with the thermometer are not precise enough to make up for the inaccuracy of the temperature readings.
- BYes, because although the measurements will be inaccurate, the precision of the thermometer makes up for the inaccuracy of the instrument.
- CNo, because measurements taken with an instrument known to be inaccurate can never be used to determine accurate values.
- DYes, because the measurements are inaccurate by the same amount, so the difference in two measurements of temperature will be accurate.
6In studying a researcher's laboratory notebook, you observe a mass measurement recorded as 0.07070 g. How many significant figures does the mass measurement have?
- A4
- B2
- C3
- D5
7What is the value of the following expression in correct significant figures?
12.3 + 150 + 26.009 =- A190
- B188.309
- C188
- D188.3
8What is the value of the following expression in correct significant figures?
628 x 342 =- A214,776 or 2.14776 x 10^5
- B21,480 or 2.148 x 10^5
- C220,000 or 2.2 x 10^5
- D215,000 or 2.15 x 10^5
9What is the value of the following expression in correct significant figures?
28.0/13.483 =- A2.0767
- B2.1
- C2.077
- D2.08
10Which of the following is in incorrect scientific notation?
- A81.3 x 10^4
- B9 x 10^2
- C7.77 x 10^0
- D1.00 x 10^-13
1110^3
10^-3
10^6
10^-6- A10^3 = Kilo (k)
10^-3 = milli (m)
10^6 = mega (M)
10^-6 = micro (μ) - B10^3 = milli (m)
10^-3 = Kilo (k)
10^6 = mega (M)
10^-6 = micro (μ) - C10^3 = Kilo (k)
10^-3 = milli (m)
10^6 = micro (μ)
10^-6 = mega (M)
- A10^3 = Kilo (k)
12Order the following measurements from largest to smallest: 10 ng, 100 g, 30 kg
- A10 ng, 100 g, 30 kg
- B30 kg, 10 ng, 100 g
- C30 kg, 100 g, 10 ng
- D10 ng, 30 kg, 100 g
13A particular photon of infrared light has a wavelength of 7.35 x 10-7 m. Given the conversion factor 1 nm = 10-9 m, express the wavelength of the photon in nanometers (nm).
- A1.36 x 10^-3 nm
- B7.35 x 10^2 nm
- C7.35 x 10^-16 nm
- D1.36 x 10^-15 nm
14Suppose you run a total of 4.35 miles in 58.75 minutes. What is your average running speed in units of km/hr?
1 mile = 5280 ft, 1 ft = 12 in, 1 in = 2.54 cm, 100 cm = 1 m, 60 minutes = 1 hour.- A0.0740 km/hr
- B116 km/hr
- C7.15 km/hr
- D0.140 km/hr
15The freezing point of mercury is -37.9ºF. What is the freezing point of mercury in ºC?
- A-38.8ºC
- B-55.7ºC
- C-53.0ºC
- D-36.2ºC
16What is the meaning of 'Degree of Uncertainty' ?
- AThe uncertainty of a measuring instrument is estimated as plus or minus, half the smallest scale division ( always one number place more than what is measured)
- BEverything you measure isn't always certain
- CMeasuring means it might be plus or minus a little from your measurement
- DEverything you measure is always certain
17??????? =
- AMass/Volume
- BVolume/Mass
- CMass * Volume
- DVolume^2 * Mass
18Speed=
- ADistance/Time
- BTime/Distance
- CTime + Distance
- DDistance/Time^2
19Time=
- ASpeed/Distance
- BDistance/Speed
- CDistance + Speed
- DSpeed + Distance
20The symbols for units of length in order from largest to smallest are
- Am, cm, mm, km
- Bmm, m, cm, km
- Ckm, mm, cm, m
- Dkm, m, cm, mm.
21The SI units for length and Temperature are
- Acentimeter and Fahrenheit.
- Bmeter and Fahrenheit.
- Ccentimeter and Celsius.
- Dmeter and Celsius.
22How is the measurement 0.000 065 cm written in scientific notation?
- A65 * 10^–6cm
- B6.5 * 10^–5cm
- C6.5 * 10^–6cm
- D6.5 *10^–4cm
23Which of these symbols represents a unit of volume?
- AmL
- BMg
- Cmm
- Dcm
24If you are measuring water in a graduated cylinder that reads to the ones place, all your measurements must
be recorded to the ________ place.- Atens
- BOnes
- Ctenths
- Dhundredths
25All of the following units are units of measurement, EXCEPT
- Agram.
- Bkilometer.
- Cvolume.
- Dounce.
26Which of these answers show 29,990 rounded to three significant figures?
- A29,900
- B29,000
- C30,000
- D3.00 x 10^4
27For which of these measurements are all the zeros significant?
- A0.0037 mL
- B60.0 mL
- C400 mL
- D0.506 mL
28Which of these is a measure of the amount of matter?
- Adensity
- BWeight
- Cvolume
- Dmass
29The number of significant figures in the measurement 0.0005050 kg is
- A2.
- B3.
- C4.
- D7.
30The density of an object is calculated by
- Amultiplying its mass times its volume.
- Bdividing its mass by its volume.
- Cdividing its volume by its mass.
- Dadding its mass to its volume.
Información
- Descripción
- Biology Test sobre C371 Unit 1, creado por eli corniel el 01/10/2021.
- Autor
- eli corniel
- Idioma
- English
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