Chemistry Homework Help

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Dimensional Analysis

#### Q. Convert each pressure measurement to atm. 2.46×10^5 Pa Express your answer using three significant figures. .

Solved • Mar 27, 2020

Dimensional Analysis

#### Q. Density of copper is 8.96g/cm^3 and density of zinc is 7.14 g/cm^3. brass is an alloy made of copper and zinc. you are given a sample of brass with the density of 8.32 g/cm³ the price of the zinc is \$1.80 per kilogram and price of copper \$6.13 per kilogram. determine the material cost for making one ton of the brass sample that you have.

Solved • Mar 4, 2020

Dimensional Analysis

#### Q. what is the mass and charge of 5.26*10^24 electrons?

Solved • Feb 6, 2020

Dimensional Analysis

#### Q. The nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the Sun. A light-year is the distance that light travels in one year (365 days). How far away, in km, is Proxima Centauri from the Sun? Express your answer using two significant figures.

Solved • Feb 8, 2020

Dimensional Analysis

#### Q. Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of 8.80 g/cm^3 and containing 0.059 % Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 2.50 mm thick and has a 2.50-cm-diameter hole drilled through its center such that the height of the hole is 2.50 mm . The silicon in the plate is a mixture of naturally occurring isotopes. One of those isotopes is silicon-30, which has an atomic mass of 29.97376 amu. The percent natural abundance, which refers to the atoms of a specific isotope, of silicon-30 is 3.10%. What is the volume of the plate? Express the volume numerically in cubic centimeters.

Solved • Feb 8, 2020

Dimensional Analysis

#### Q. When doing dimensional analysis, when the question gives, for example, .24 km/min, how would I change it to another unit like mi/hr?

Solved • Feb 5, 2020

Dimensional Analysis

#### Q. Convert the following quantities into SI units with the correct number of significant figures.

Solved • Feb 2, 2020