A sample of a compound made entirely from copper and oxygen was found to have a total mass of 0.1431g The mass of the copper In the compound was found to be 0.1271g. Calculate the number of moles of copper in the sample.

Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a word equa - tion and an unbalanced formula equation. Include all of the appropriate notations.

Type of energy that is stored in the core of an Adam

In which list are the elements arranged in order of increasing atomic mass? (1) Cl, K, Ar (3) Te, I, Xe (2) Fe, Co, Ni (4) Ne, F, Na

How do I do this? Consider the chemical reaction 2NH3 (g) N2 (g) + 3H2 (g). The equilibrium is to be established in a 1.0-L container at 1000 K, where Kc = 4.0 * 10-2. Initially, 1.22 moles of NH3 (g) are present.

5. What are two disadvantages of sexual reproduction?

How does the surface on which a car moves affect how fast it goes

How many milliseconds (ms) are there in 3.5 seconds (s) ?

Which pair of organs, located in the lower back, collects liquid and waste from the blood? A. liver B. lungs C. kidneys D. skin

A caterpillar has an exoskeleton and feeds on many leaves before it makes a cocoon and becomes a butterfly. Which type of organism is a caterpillar? 1. an autotroph and an invertebrate 2. a heterotroph and an invertebrate 3.

Which of the following gases is produced by a storage battery when it's charging?