A star is estimated to have a mass of 2.0 ✕ 1036 kg. Assuming it to be a sphere of average radius 7.2 ✕ 105 km, calculate the average density of the star in units of grams per cubic centimeter.

Q: It has been estimated that 8.0 × 104 tons of gold (Au)have been mined. Assume gold costs $1350 per…

A: Given that : Mass of gold = 8.0×104 tons Cost of gold = $1350 per troy ounce Worth of gold =? (1…

Q: A student measures the mass of a piece of aluminum, and finds it to be 8.945 g. She finds that the…

A:

Q: A scientist removed a sample of 37.8 grams of a chemical from a container. The sample was 4 1/4 less…

A: Given the mass of the sample removed out of the total mass = 37.8 g  Suppose the total mass of the…

Q: The concentration of mercury in a polluted lake is 0.33 micrograms per liter of water. What is the…

A: Given,Volume of the lake = 1.5 x 1012cm30.33 micrograms per liter of water

Q: The average distance between the Earth and the Moon is 240,000 miles. Express this distance in…

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: An empty vial weighs 59.43 g. If the vial weighs 158.65g when filled with liquid mercury (d=13.53…

A: Given,Mass of empty vial = 59.43 gMass of vial filled with liquid mercury = 158.65 gMass of liquid…

Q: The density of mercury is 13.6 g/cm^3. What is the mass of 6.50 cm^3 of mercury? (^ means that the…

A: Given  Density of mercury = 13.6 gram/cm3  Volume of mercury = 6.50 cm3 Mass = ?

Q: In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass…

A:

Q: An instrument used to detect metals in drinking water can detect as  little as 1 μg of mercury in 1…

A: According to this question, Using formulas are  No.of atoms in V Ltrs of water = mass in V Ltrs…

Q: the density of gallium triiodide, Gal, is 4.15g/cm^3. If the initial volume of water in a graduated…

A: The volume of the water increased after adding the crystal of gallium triiodide can be calculated…

Q: A piece of copper has a volume 300 L. What is the mass of the sample, in units of grams? Fill in…

A: the Red box is filled as shown below:

Q: A star is estimated to have a mass of 1x10^36 kg. Assuming it to be a sphere with an average radius…

A: First, volume of sphere with given radius 7.5x105km is determined as follows,

Q: Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with the…

A:

Q: The quantitative significance of “take a deep breath" varies, of course, with the individual. When…

A:

Q: what mass (in g) of solid lead would displace exactly 234.6 liters of water? The density of the lead…

A: Given : density of lead = 11.4 g/cm3                                                 Volume of water…

Q: The shattered glass case at the scene of a jewelry store robbery was determined to be made of potash…

A: Density of any substance can be defined as the ratio of the mass of the substance to its volume. It…

Q: Iron has a density of 7.874 g/cm^3.What is the mass of a rectangular block of iron with dimensions…

A: Density of a substance is given by the ratio of mass of the substance to its volume. Density =…

Q: THe density of aluminium is 2.7 g/cm3. what is the mass, in grams, of a piece of aluminium foil that…

A: Given, density of aluminium is 2.7 g/cm3

Q: In the area of nano-chemistry, particles defined as nanoparticles range in size from 1-2500 nm.  1…

A:

Q: A sample of an unknown ore weighing 1.275 kg is found. When the sample is placed into a large…

A: Given that : Mass of the sample = 1.275 kg = 1275 g When the sample is placed into a large graduated…

Q: It is estimated that an adult person contains 6.3 × 103 ppm phosphorus. What mass of phosphorus in…

A: By definition, ppm refers to parts per million.  Therefore, ppm of phosphorus in adult person would…

Q: The shattered glass case at the scene of a jewelry store robbery was determined to be made of potash…

A: When a body is immersed in a fluid, it displaces the fluid. Then calculate, --------- (1)

Q: What is the mass of a piece of silver metal that has a volume of 17.4 cm^3? (The density of silver…

A: Given:  Volume of silver piece given= 17.4 cm3  Density of silver metal= 10.5 g/cm3

Q: Given the density of Au is 19.3 g/cm3, determine the mass of gold in an ingot with the dimensions of…

A:

Q: 2. You purchase a rectangular piece of metal that has  dimensions 5.0 X 15.0 X 30.0 mm and mass…

A: A numerical problem based on measurement, which is to be accomplished.

Q: A pure silver coin weighs 8.062 grams. Determine the volume (in L) if the density of silver is 1.049…

A: Given: Mass of pure silver coin= 8.062 g The density of silver =1.049 x104 kg/m3 To find: Volume in…

Q: The density of a cooking oil is 0.92g/cm^3 calculate the mass in grams g for an oil droplet has a…

A:

Q: The shattered glass case at the scene of a jewelry store robbery was determined to be made of potash…

A:

Q: A student experimentally measured the density of gold as 19.98g/cm^3. A handbook reports a value of…

A: The given information is as follows: The experimentally measured value of density of gold (measured…

Q: The total amount of fresh water on earth is estimated to be 3.73 x 10^8 km^3. What is this volume In…

A: Given: Amount of fresh water = 3.73×108 km3

Q: the radius of a neon atom is 6.9 x 10 ^-2 nm, and its mass is 3.35 x 10^-17 micrograms. what is the…

A: 6.9 * 10-2 nm = 6.9 * 10-12  m  We know that formula of volume of sphere  = 4/3 πr3  As 1 meter =…

Q: About two centuries ago, Benjamin Franklin showed that 1 teaspoon of oil would cover about 0.5 acre…

A: The volume of the oil (V) = Area (A) x Thickness (T), or T = V/A  Given: The volume is 5.0 cm3. The…

Q: If a sample of gold alloy has a mass of 87.7 g and is 78.3% gold by mass, what percentage of the…

A: An alloy of gold which contains gold and any other metals Mass of alloy = 87.7 g  % by mass of gold…

Q: About two centuries ago, Benjamin Franklin showed that 1teaspoon of oil would cover about 0.5 acre…

A: The volume of the oil (V) = Area (A) x Thickness (T) T = V/A    1 km = 0.6214 mi, so 1 km2 = (0.6214…

Q: In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass…

A:

Q: In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass…

A: Calculate mass of black hole: 1 kg = 1000 g

Q: A star is estimated to have a mass of 2 x 1036 kg. Assuming it to be a sphere of average radius 7.0…

A: Given:m = 3 x 10³⁶ kg, the mass of the starr = 7.6 x 10⁵ km = 7.6 x 10⁸ mCalculate the volume of the…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.