An element makes up 0.0021% of the Earth's continental crust by mass. Express this in ppm (parts per million), to an appropriate number of significant figures

Q: A sphere of radius r has surface area A = 4πr2 and volumeV = (4/3)πr3. If the radius of sphere 2 is…

A: a)The ratio of the areas, A2/A1

Q: (a) How many significant figures are in the numbers 999.0 and 106.ó? 999.0 1000.0 (b) If the…

A: (a) Significant numbers in 999.0 is 4 Significant numbers is 1000.0 is 5

Q: One cubic centimeter (10 cm3) of water has a mass of 1.0 x 10-3 kg. (a) Determine the mass of 1.0 m3…

A: Given that:For Volume V=1 cm3 or 10-6 m3, mass of water  m=1.0×10-3 kgBiological substances are 98%…

Q: One mole of atoms consists of 6.02 × 1023 individual atoms. If one mole of unicorn atoms were spread…

A: Determine the surface area.

Q: An atom of a particular element has a volume of 6.1 x 10" volume in cubic nanometers ? m What is…

A:

Q: How many significant figures are in the following numbers?(a) 78.9 ± 0.2 (b) 3.788 x 109 (c) 2.46 x…

A: To determine Significant Figures

Q: An object with a mass of 61.0 g displaces 785.0 ml of water when it is completely immersed. What is…

A: Mass = 61  Volume = 785 mL Fbuoyant = Fb = rho*V*g = 10^-3*785*9.8 = 7.693 N

Q: Iron has a density of 7.87 g/cm3, and the mass of an iron atom is 9.27 * 10-26 kg. If the atoms are…

A:

Q: The following lengths are given using metric prefixes on the base SI unit of length: the meter.…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: The micrometer (1 µm) is often called the micron. (a) How many microns make up 4.0 km? | um (b) What…

A: Given 1μm=10-6 m

Q: How many significant digits are in the exact number 155?

A: Given: The number is 155.

Q: A typical atom has a diameter of about 1 × 10^ -10 m. (a) What is this in inches? (b) Approximately…

A: given data diameter of each atom, d = 1.0*10-10 m 1 cm line what is this in inches? how many atoms?

Q: The following times are given in seconds. Use metric prefixes to rewrite them so the numerical value…

A: a) The required time is, b) The required time is,

Q: A partly-full paint can has 0.711 U.S. gallons of paint left in it. (a) What is the volume of the…

A: Volume of paint = 0.711 US gallons

Q: (1) A typical bacterium has a mass of 1 picogram (1 × 10-¹2 gram). Calculate the mass of a mole (or…

A: Mass of bacterium m= 10^-12gm.

Q: How many significant figures are in the following numbers? (a) 78.9 ±\pm± 0.2 (b) 3.788 ×\times× 109…

A: 3

Q: What is the difference between a base unit and a derived unit? (b) What is the difference between a…

A:

Q: Treat a cell in a human as a sphere of radius 1.0 μm.(a) Determine the volume of a cell. (b)…

A: Let r be the radius of the cell, and consider the body to be a cylinder of radius a=6 inches and…

Q: You measure the mass of your phone to be 161 grams, but the manufacturer's website lists it as 163.9…

A: Given data:  Actual mass (m) = 161 g Expected mass (m') = 163.9 g Required:  The percentage error

Q: Express this product in units of km3 in standard scientific notation and with the appropriate number…

A: given that (4.2 km) × (4.0 m) × (13.24 × 10−3 mm)

Q: Sales delay is the elapsed time between the manufacture of a product and its sale. According an…

A: Dear student, As per guidelines, I can only first 3 subparts. Please repost other parts in next…

Q: Estimate the number of molecules that make up Earth, assuming an average molecular mass of 30 g/mol.…

A:

Q: State the number of significant figures in the following :(a) 0.007 m2 (b) 2.64 × 1024 kg (c) 0.2370…

A: a)In 0.007 m2, only significant digit is 7.Answer: No of significant digits: 1

Q: Estimate the number of pennies that would fit in a box one foot across by one foot wide by one foot…

A:

Q: A lecture period (50.0 min) is close to 1.00 microcentury. (a) How long is a microcentury? (b) Usin…

A: (a)we know that,minutes in 1 century=52.6×106 minutesminutes in 1 micro century= 52.6 minutes

Q: The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is (a) 663.821 (b)…

A: Adding the givens, Sum=436.32+227.2+0.301        =663.821

Q: (a) How many significant figures are in the numbers 99.0 and 100.0?

A: The number of reliably known digits in a number is called the number of significant figures. The…

Q: In a certain culture of bacteria, the rate of increase is proportional to the number present. (a) If…

A: (i) Let x be the number of bacteria in the culture at time t. The rate of increase dydx is…

Q: The micrometer (1 um) is often called the micron. (a) How many microns make up 3.8 km? (b) How many…

A:

Q: (a) How many significant figures are in the numbers 999.0 and 1000.0? 999.01000.0 (b) If the…

A: In the number 999.0, there are four significant figures. This is because all non-zero digits are…

Q: 3. The volume of a sphere is where r is the radius of th bowling ball to be r = 5 in %3D

A:

Q: Azelastine hydrochloride is an antihistamine nasal spray. A standard-size container holds one fluid…

A: A container has fluid in one ounce (oz), and find out in the Europe in ml unit

Q: A partly-full paint can has 0.499 U.S. gallons of paint left in it. (a) What is the volume of the…

A: Volume of paint = 0.499 US gallons (a) As 1 US gallons = 0.00378 cubic meter Then, 0.499 US gallons…

Q: The number of significant figures in 0.06900 is (a) 5 (b) 4 (c) 2 (d) 3

A: The number of significant figures in 0.06900 is

Q: How many significant figures are there in (a) 0.0210, (b) 5.060, (c) 7.10 * 10-4,(d) 1.0 * 105?

A: significant figures

Q: A study fonds that the metabolic rate of mamals is proportional to the mass of the mamal carried to…

A: