What is the mass number of a uranium isotope that has 92 protons and 143 neutrons?

3. How many moles of carbon dioxide gas, CO2, are there in 2.8 L of this gas at STP?

What is the area of chemistry concerned with the speed of reactions?

What would happen to the ratio of copper to iron if you had placed more nails in the beaker?

What mass of the original (25.00% by mass) solution contains 0.500 mol NaOH?

Calculate the quantity of energy required to change 8.22 mol of liquid water to steam at 100oc. the molar heat of vaporization of water is 40.6 kj/mol.

A 3-column table with four rows. The first column has entries Liquid A, Liquid B, Liquid C, Liquid D. The second column titled mass has entries 160 grams, 173 grams, 198 grams, 220 grams.

Which option correctly describes the influence of electronegativity difference on bond character?

How do I write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide anions?

When table salt is placed in water and stirred it dissolves and a clear liquid is obtained. This process is a

Carbonic acid is generated by bubbling co2 into a beaker of water. If it took 5 minutes for this reaction to reach equilibrium, how would the results differ if the enzyme carbonic anhydrase was added to the beaker of water?