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Calculate the atomic mass and identify the element. exact mass,  amu                         percent abundance 34.968852                             75.77% 36.965903                             24.23%     

A 44.0 g sample of stainless steel is placed in a graduated cylinder containing 30.2 mL of water and the water level rose to 35.8 mL. What is the density of stainless steel?

The mass of 78 kg equals

Round 129995 to four significant figures.        

Round the number  0.0607545 to four significant figures.   

Compute the following: Number of moles of copper in 254 g of copper[moles] Mass of 0.050 mol of copper[grams1] Mass of 1.81×1024 atoms of copper[grams2] Number of moles of copper in 2 moles of Cu3(PO4)2 [moles2]

The amount of phosphorus in an 85 kg person is approximately 0.9 kg. What is the weight of phosphorus in pounds?

Identify the period and the group number of each element Be  period[period1]group[group1] Se  period[period2]group[group2] Re  period[period3]group[group3] Fe  period[period4]group[group4] Ce  period[period5]group[group5]

Convert 12557 feet to meters. Round your answer to three significant figures.

The density of tungsten is 19.35 g/cm3. A sample of tungsten is placed in a graduated cylinder containing 16.1 mL of water and the water level rises to 23.6 mL. What is the mass in grams of the sample of tungsten?