Iron and sulfur react to yield iron sulfide. Balance this reaction. ___Fe (s) + ___S8 (s) → ___FeS (s)

The atomic number of manganese is 25; its mass number is 55. How many neutrons does an atom of manganese have in its nucleus? a) 25 b) 80 c) 30 d) 55

A slice of Swiss cheese contains 47 mg of sodium. (a) What is this mass in grams?.047 (b) What is this mass in ounces? (16 oz = 453.6 g) 0.0016 X (c) What is this mass in pounds? (1 lb 453.6 g) 0.0001x

Which of the following is not a nanoscale object? A sugar molecule An oxygen atom An enzyme A muscle cell

If an electron transfers from one atom to another what type of bond will most likely form

Using the ideal gas law, determine the amount of gas, in moles, of a 8.32 L sample of hydrogen gas, under a temperature of 310 K and a pressure of 1.7 atm.

When did Pangaea begin to break apart? a. 20 million years ago c. 250 million years ago b. 100 million years ago d. 2 billion years ago.

When an object is thrown, the thrower pushes the object. This causes the object to move in a motion.

Distinguish between accuracy and precision in measurements

What is the concentration of h + ions in a 2.20 m solution of hno3?

Which type of cell is a rose thorn? prokaryotic eukaryotic plant eukaryotic animal chloroplastic