Fill in the coefficients that will balance the following reaction: a0PbI4 + a1CrCl3 → a2PbCl4 + a3CrI3

Which best describes why NH4 + can form an ionic bond with Cl-? Its outermost shell gains one or more electrons from Cl-. Its positive charge is attracted to the negative charge of Cl-. It has a negative charge that is spread over the entire ion.

Mg + HCI = MgCI2 = H2

How many protons and neutrons does lithium have?

Assume that the density and heat of combustion of E85 can be obtained by using 85 % of the values for ethanol and 15 % of the values for gasoline. How much energy could be released by the combustion of 3.5 L of E85?

What gene is responsible for tumor suppression? A. beta - galactoside B. p53 C. alpha goblin D. beta goblin

Drinking water may contain a low concentration of lead ion (Pb2) due to corrosion of old lead pipes. The EPA has determined that the maximum safe level of lead ion in water is 15 ppb.

A student examines the temperature and precipitation on a given day using a thermometer and a rain gauge. The student is measuring- A. temperature only B. climate only C. wind speed only D. specific weather conditions

Atoms - 1 2 3 4 Protons - 8 10 9 8 Neutrons - 10 9 9 11 Electrons - 8 10 9 8 Which two are isotopes of one another?

A radioactive isotope has the same number of protons as its stable parent atom, but differs in its number of what?

A student experimentally obtained the density of osmium the densest element as 22.57g/cm3 the density of osmium is reported to be 22.48 g/cm3 determine the student percent error