An isotope of radon has 86 protons and 137 neutrons. What is the mass number of this isotope?

What is the two significant figure of 11.76 cm^2? Rounded Answer

Describe what happens when two atoms of potassium react with one atoms of sulfur

What will happen if HCl is added to a saturated solution of NaCl? 1) NaCl will precipitate. 2) NaCl will remain dissolved. 3) The solubility of NaCl will increase. 4) The concentration of Cl - ions will decrease

5. How are the empirical and molecular formulas for a compound related? A An empirical formula is sometimes a multiple of the molecular formula. Ba molecular formula is always the same as an empirical formula.

When rocks return to the earths mantle what are the main factors that control this change.

Which combination of protons neutrons and electrons is correct for the isotope of copper - 63?

What is the purpose of a domain?

What is the ideal gas constant? A. It is a constant that applies only at STP. B. It is a specific constant for a particular gas. C. It is a universal constant used for all gases. D. It is a constant that depends on the conditions.

The greenhouse effect is a result of the Sun's energy being absorbed by objects on the Earth and converted into which type of radiation? A) Radio B) Visible C) Infrared D) Ultraviolet

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.