Concept explainers
Practice ProblemATTEMPT
Determine the number of significant figures in the following measurements:
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Chemistry
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- An aluminum plate has a diameter of 25.0 cm and weighs 335 g. If the density of aluminum is 2.70 g/cm3, what is the thickness of the plate? (A) 0.632 mm (B) 2.53 mm (C) 3.16 mm (D) 1.58 mmarrow_forward1) A 1.728 in' of a substance has a mass of 36 grams. What is the density of the substance in g/cm'? (1 inch= 2.54 cm) (a) 21 (b) 5.6 (c) 30, (d) 14 (e) 1.3arrow_forwardComplete the following table Material Mass of Displaced Water (g) Mass of Sample (g) Volume of Sample (mL) Density of Material (g/mL) Metal 1 0.36 3.17 (A) (D) Metal 2 0.46 3.73 (B) (E) Metal 3 0.47 3.67 (C) (F)arrow_forward
- Suppose that instead of using the cylindrical rod of Example 1-2 to prepare a 1.000 kg mass we were to use a solid spherical ball of copper. What must be the radius of this ball? (d = 8.96g)arrow_forward3) Multiply 6.4 x 10^-3 times 8.0 x 10^7 and express the answer in scientific notation.(a) 5.1 x 10^-21(b) 5.1 x 10^–3(c) 5.1 x 10^3(d) 5.1 x 10^4(e) 5.1 x 10^5 Step by step 4) Round off the following measurement to three significant digits: 14,546 cm.(a) 145 cm (b) 146 cm(c) 14,500 cm (d) 14,600 cm(e) 15,000 cm Step by steparrow_forwardWhich quantity in each of the following pairs is larger? (a) 5.63 * 106 cm or 6.02 * 101 km(b) 46µs or 3.2 * 10-2 ms(c) 200,098 g or 17 * 101 kgarrow_forward
- Which of the following will be homogeneous mixture? (A) All of them (B) N2 and Ar (C) C2H5OH and H2O (D) NH4Cl and H2O (E) C6H6 and C7H8arrow_forwardSuppose that instead of using the cylindrical rod of Example 1-2 to prepare a 1.000 kgmass we were to use a solid spherical ball of copper What must be the radius of this ball?arrow_forward(a) What is the volume (in km³) of Avogadro's number of sand grains if each grain is a cube and has sides that are 1.6 mm long? 2470000 ✔ km³ (b) How many kilometers of beaches in length would this cover if the beach averages 123 m in width and 12.1 m in depth? Neglect air spaces between grains. 1840 kmarrow_forward
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