Why are noble gases considered to be non-reactive

Give 3examples of an element, define

Use Hess's Law and equations B and C to find the enthalpy change for equation A. A) 2 C2H4 + H2O à C4H9OH ΔH = ? B) 2 C2H4 + 6 O2 à 4 CO2 + 4 H2O ΔH = - 2822.2 kJ C) 4 CO2 + 5 H2O à C4H9OH + 6 O2 ΔH = 1534.7 kJ

Use the equation: 2 kclo3 2 kcl + 3 o2 to write the mole ratio needed to calculate: (a) moles of kcl produced from 3.5 moles of kclo3 mol kcl mol kclo3 (b) moles of kcl produced when 4.5 moles of o2 are produced. mol kcl mol o2

The time is recorded from three different clocks as indicated below. The "true" time is exactly 8:30 A. M.

How does atomic radius change from left to right across a period in the periodic table? a. it tends to decrease. c. it first increases, then decreases. b. it tends to increase. d. it first decreases, then increases.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda