Which model of the atom was the first to contain a nucleus?

What is the mass of 4.91 x10^21 platinum atoms?

A scientist who wants to study the effects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, Plant B gets 5mg of fertilizer each day, and Plant C gets 10mg of fertilizer each day. Which plant is the control group?

Determine the theoretical yield of HCl if 60.0 g of BCl3 and 37.5 g of H2O are reacted according to the following balanced reaction. A possibly useful molar mass is BCl3 = 117.16 g/mol. BCl3 (g) + 3 H2O (l) → H3BO3 (s) + 3 HCl (g)

How would i calculate molecules of water produced in a reaction?

Write a balanced equilibrium equation for the dissolution of nai in water. include phases.

The rate constant of a reaction is 4.7*10-3 s-1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C?

What are the pros of using steel?

Cation a has a + 3 charge and is small. cation b has a + 1 charge and is large. which is more likely to occupy negatively charged sites on a clay mineral given equal concentrations in solution? cation a cation b they are the same

Show your work, including units, for the following series of calculations: a. How many moles of Al are in 1.25 g of Al? b.

An aqueous solution at 25 °C has a pOH of 12.42. Calculate the pH. Round your answer to 2 decimal places