The following balanced equation shows the information of an ammonia how many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?

A sample of which radioisotope emits particles havingthe greatest mass? A) 137Cs B) 53Fe C) 220Fr D) 3H

A sample of hydrogen (H2) gas is collected over water at 35oC and 725 mm. The volume of the gas collected is 72.0 ml. How many moles of H2 gas has been collected? How many grams of H2 gas has been collected?

What is the approximate percent by mass of potassium in KHCO3? A 19% B 24% C 39% D 61%

The nucleus of an atom of the copper isotope 63Cu contains 29 protons and 34 neutrons. How many electrons must be removed from a neutral 63Cu atom to completely ionize it, leaving only a nucleus

Recovering the salt from a mixture of salt and water could bestbe accomplished by (1) evaporation (2) filtration (3) paper chromatography (4) density determination

What is the nature of the Ca-Cl bond in a molecule of calcium chloride (CaCl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.167 O A nonpolar covalent B. moderately polar covalent C.

Which statement is true about oxidation and reduction in an electrochemical cell? (1) Both occur at the anode. (2) Both occur at the cathode. (3) Oxidation occurs at the anode and reduction occurs at the cathode.

For a solar eclipse to occur,

How many times does the citric acid cycle occur for each molecule of glucose?

Which planet is made of mostly gas