The density of a material can be used to calculate the volume of an object if its mass is known. Likewise, the mass can be calculated if the density and volume are known. A pre-1964 quarter, made predominantly of silver (density = 10.5 g/ml), was determined to have a mass of 6.25 g. What is the volume of the quarter? %3D a) 0.595 mL b) 1.68 mL O c) 6.25 mL d) 65.6

CHEMISTRY Calculating Density Density is the compactness of matter. Density describes the quantity of matter (mass) per unit of volume (3-dimensional space). Density is calculated as the mass of the matter divided by volume. The symbol for density is Greek letter rho (p). The units for mass are in grams (g) and the units for volume is cubic centimeter (cm³). It should be noted that 1 cm³ is equal to 1 ml of volume. 1 cm³= 1 ml. The units for density are g/cm³. Part 1 Determine the density of the new liquid materials created in the Secret Density Research Laboratory. Type the value (no units) of the density into the boxes in the density column. Report density to the 2nd number after the decimal. Use a zero to the lef of the decimal for values less than 1.00. Examples: 2.35, 0.75, 1.90 Material name Harrisonite Waltonium Kellese Wheelernone Osborneum Popebrillium Mass (g) 430 590 260 m P=V 620 380 510 Volume (cm³) 537 454 236 364 633 340 Density (g/cm³) SAMSUNG

Atoms are the smallest spherical particles that make up any matter. If 6.0x1023 atoms of aluminum weigh 27 g, calculate mass of 1 atom of aluminum in picograms (pg).

How many grams Fin 584.8 g Br2F6? Put the answer in the box in regular (non-scientific) notation. Use one figure past the decimal.

The mass of the pycnometer with water is 30.5 g, while the mass of the pycnometer is 36.5 g. What is the mass of the water in the pycnometer?        A) the mass of the water in the pycnometer is 6 g b) the mass of the water in the pycnometer can’t be determined C) the mass of the water in the pycnometer is 35 g D) the mass of the water in the pycnometer is 6.5 g

2A. The average density of Earth is 5.52 g/cm3. What is its density in (a) kg/m3; (b) Ib/ft³? 2B. There are 2.60 x 1015 short tons of oxygen in the atmosphere (1 short ton = 2000 Ib). How many metric tons of oxygen are present (1 metric ton = 1000 kg)?

67. Pure bromobenzene, C H Br, boils at 156.0°C and has a boiling point constant of 6.26°C/m. A sample of bromo benzene is contaminated by anthracene, C4H10. The boiling point of the impure sample is 159.2°C. How pure is the sample? (Express your answer as mass percent bromobenzene.) I've spent forever trying to figure this out. For now my answer is 6.56%, but it doesn't seem right. Before, I got 97.9%. are either of those correct?

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3. The total volume of seawater is 1.5 x 1021 L. Assume that seawater contains 3.1% NaCl by mass (this means that there are 3.1 g NaCl in 100 g solution) and that its density is 1.03 g/mL, calculate the total mass of NaCl in the seawater in kilograms. Note that 1 kg = 1000 g. 4. Copy the table and fill in the blanks with the appropriate values, symbols and the like: (Note: You can use a periodic table to locate the element.) 5. 6. 7. 8. SYMBOL protons neutrons electrons net charge Which of the following are: (a) SO₂ (b) Sg 5 6 5 Write only the letter of your choice. (c) Cs (d) N₂O5 56 26 A. Molecules but not compounds B. Compounds but not molecules C. Both compounds and molecules Which of the following has more atoms? A. 1.10 g of hydrogen (H) atoms B. 14.7 g of chromium (Cr) atoms 2+ Fe CHEM01-(09-101P) Problem Set No. 1 (e) (f) 0₂ o o Which of the following has a greater mass? A. 2.0 atoms of lead B. 5.1 x 1023 mole lithium 16 18 - 3 79 117 79 (g) CH4 (h) KBr 86 136 0 Write the…

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