Is the following a cation or an anion and what is the charge?

a) an iodine ion with 53 protons and 54 electrons

b) an iron ion with 26 protons and 23 electrons

What is the molar mass of sodium nitrate, NaNO3?

1. What is the volume of 0.900 moles of an ideal gas at 25.0° C and a pressure of 950.0 mm Hg? 1.50 liters 17.6 liters 18.0 liters 34.2 liters 2. What is the pressure, in mm Hg, of 2.50 moles of an ideal gas if it has a volume of 50.

Lithium and potassium have similar chemical properties because the atoms of both elements have the same (1) mass number (2) atomic number (3) number of electron shells (4) number of valence electrons

What happened approximately 20,000 years ago? A. the last ice age B. the last glacial maximum C. the last interglacial period D. a change in Earth's axial tilt

Which is not an example of a vestigial structure

What information can be learned about the element chlorine (Cl) by looking at the periodic table? Select all that apply. chlorine has 35.45 protons chlorine has 35.45 neutrons chlorine has 17 protons chlorine has 17 electrons

Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) When combining zinc metal with hydrochloric acid, you notice that you run out of zinc and still have plenty of hydrochloric acid to continue the reaction. What is the term used to describe the zinc?

Engineers increase output in crop production by combining the strengths of two plants. This can be done by using one plant to pollinate a different plant so that their strengths are combined into a new plant. What is this technique called?

Using the first volume and temperature reading on the table as V1 and T1, solve for the unknown values in the table below. Remember to use the rules of significant figures when entering your numeric response. A: B: C: D: A 2-column table with 5 rows.

Which scientist performed the cathode ray experiment leading to the discovery of electrons