you have an atom with 7 protons, 7 neutrons and 7 electrons. what is the approximate atomic mass in units of amu

• A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0 °C. During the summer, the temperature in the storage area reached 40.0 °C.
• A sample of CaSO4(s) is placed in a container and then heated so that it decomposes according to the following equation:
• What volume of oxygen gas at STP is needed to react with 5.75 mol of C2H4?
• Suppose that 50% of first year college students take a mathematics course, 40% take a biology course, and 20% take both mathematics and biology during the first year.
• The reaction between copper(II) chloride dihydrate and aluminum must occur in an aqueous environment...
• At what temperature will 41.6 grams N2exerts a pressure of 1.07 atm in a 20.0 L cylinder?
• What is the enthalpy change (H^0) in kJ/mol for the following reaction?
• Gaseous C2H4 reacts with O2 according to the following equation:
• What is the empirical formula of a molecule containing four sulfur atoms and four fluorine atoms?