Which information in the periodic table indicates the number of protons in an atom? A. the position of the element in its column B. the element's chemical symbol C. the element's atomic mass D. the element's atomic number

A student collects data during an experiment Mass of empty beaker - 77.25 Mass of 100L water-100.0 g Mass of salt - 20.0 g Total mass-197.

2. How many moles of H2 are needed to produce 36 moles of PH3? P4 + 6H2 → 4PH3

The observation that ethanol (C2H5OH) has a higher vapor pressure than water (H2O) at the same temperature is due to more A. Hydrogen bonding in the water B. Kinetic energy in the ethanol C. London forces in the ethanol D.

What's the formula unit for magnesium and sulfur?

Harry has dark hair like his father, but his mom has red hair. Using the genotypes of rr (red hair), Rr (dark/brown hair), RR (dark/brown hair), what possible genotypes does each of the potters have?

Is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations?

How much MnO2 (s) should be added to excess HCl (aq) to obtain 295 mL of Cl2 (g) at 25 °C and 735 Torr?

Why do people describe water as a universal solvent

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?