The mass of an electron is 9.11 10-28

g. what is the mass of a mole of electrons?

According to newton law graviton which statement are true

Item 3 Which statement is true about impact craters? They are caused by volcanoes. They only exist on the moon. Earth has impact craters. Impact craters form when stars collide with planets.

Which element has the smallest radius? a. fluorine b. iodine c. chlorine d. bromine

2. A calibration curve requires the preparation of a set of known concentrations of CV, which are usually prepared by dieting a stock solution whose concentration is known. Describe how to prepare 10.

What are examples of a chemical reaction? Select all that apply. A (2AgI + Na2S → Ag2S + 2NaI B) 4FeS + 7O2 → 2Fe2O3 + 4SO2 C) H2O → SiO2 D) SnO2 → Sn + 2H2O

How much energy must be added to 2 mol H2O (g) to cause it to decompose into H2 and 02? KJ

How many moles are there in 270.4 g sample of NaOH

Suppose a 10.0 L reaction vessel is filled with 0.86 mol of BrOCl and 0.86 mol of BrCl. What can you say about the composition of the mixture in the vessel at equilibrium?

Formula for zinc nitrate

Definition: One of a class of elements having properties intermediate to metals and nonmetals.