If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-28 have?

Carbon dioxide (CO2) is a gaseous compound. Calculate the percent composition of this compound. Answer using three significant figures. What is the percent by mass of carbon? %

Which crime has the highest association with alcohol use? robbery manslaughter murder assult

What phase change requires a substance to absorb energy? Select all that apply. melting freezing evaporation sublimation condensation

If 0.500 mole of calcium carbonate is produced in a particular reaction, how many moles of sodium chloride are produced in the same reaction? CaCl2 (aq) + Na2CO3 (aq) → CaCO3 (s) + 2 NaCl (aq)

A 50.0 mL sample containing Cd2 + and Mn2 + was treated with 56.3 mL of 0.0500 M EDTA. Titration of the excess unreacted EDTA required 13.4 mL of 0.0310 M Ca2+. The Cd2 + was displaced from EDTA by the addition of an excess of CN-.

Which of the following quantum number combinations is not allowed in an atom? A. n = 2, l = 1, mr = - 1 B. n = 1, l = 1, m = 0 C. n = 8, l = 5, m = - 4 D. n = 6, l = 3, m = 2

13. Adding thermal energy to a gas at constant pressure will cause

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?

How do you find the ph of water

How many total electron will fit in the 1st energy level