What is the mass of an ink pen on a triple beam balance

The molar mass of Cu is 63.5 g/mol. The molar mass of Ag is 107.9 g/mol. What mass, in grams, of Ag is produced from reaction of 31.75 g of Cu?

A cylindrical specimen of some metal alloy having an elastic modulus of 126 GPa and an original cross-sectional diameter of 3.4 mm will experience only elastic deformation when a tensile load of 2130 N is applied.

Ron and Hermione begin with 1.50 g of the hydrate copper (II) sulfate ∙ x-hydrate (CuSO4 ∙ xH2O), where x is an integer. Part of their practical exam is to determine this integer x.

What is the measure of how hot or cold the air is

Is it really possible for humans not to alter the natural world around them?

How many moles of liquid water must freeze to remove 100 kJ of heat? (ΔHf = - 334 J/ g.

What is the power of a kitchen blender if it can perform 3750 joules of work in 15 seconds?

A 75.00 g a sample of a substance is analyzed and found to consist of 32.73 g phosphorus and 42.7 g oxygen. calculate the percent composition of this substance.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

A 1.8-mL volume of seawater contains about 4.0 * 10^-10 g of gold. The total volume of ocean water is about 1.5 * 10^21 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $19.