How many protons are in an ion with 54 electrons and a - 1 charge?

A reaction takes place in a bomb calorimeter. if the calorimeter decreases in temperature over the course of the reaction, what are the signs of qcal and qrxn?

How to classify chemical reactions

A 25 mL sample of 0.100 M HNO3 completely reacts with NaOH according to this equation: HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (1) How many moles of HNO3 are in the sample?

Calculate the percent by mass of C in pentaerythritol (C (CH2OH) 4)

What kind of element has the greatest tendency to attract electrons? why?

What are the concentrations of Cu2+, NH3, and Cu (NH3) 42 + at equilibrium when 18.8 g of Cu (NO3) 2 is added to 1.0 L of a 0.

Estimate the optimal number of neutrons for a nucleus containing 70 protons.

Students conduct an experiment in which steel wool is burned in a closed test tube. The steel wool reacts with an amount of oxygen equal to 1.43% of the mass of the steel wool. What is the correct value for the missing mass in the table?

Which of the following properties of water allows an insect to "climb" up a tube? Capillary action Cohesion Adhesion Density

What is the pOH of a solution with [OH-] = 2.0 10-2? A. 2.00 B. - 1.70 C. 3.01 D. 1.70