An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. how many electrons does boron have? 11 15 5 2

4. Quando se obtém a potência máxima da célula, o valor indicado no amperímetro, na unidade SI, está no intervalo: (A) [3,1; 3,2]. (B) [3,4; 3,5]. (C) [2,3; 2,4]. (D) [1 ...

G (1) = 0 g (n) = g (n-1) + n g (2) =

The rate constant of the elementary reaction CH3OCH3 (g) CH4 (g) + CH2O (g) is k = 8.33*10-6 s-1 at 427°C, and the reaction has an activation energy of 245 kJ mol-1. (a) Compute the rate constant of the reaction at a temperature of 545°C.

Each of the given statements describes a type of column chromatography. Match the statements to the type of chromatography they describe. If a statement can describe all of the types, place that statement in the All category.

Do household items tend to be more acidic or basic? Are you surprised? Why or why not?

How many metaloides are found on the periodic table

Which of the following is considered to be a chemical property of matter?

How does percent composition by mass contribute to writing a balanced equation?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?