Which of the following is equal to 1 mole? a. Avogadro's number b. 6.02 x 1023 atoms of gold c. the number of water molecules in 18.01 mL of water d. all of the above

8. How many electrons are in the outermost shell of a sulphur (S) atom? A. 1 B. 2 C. 6 D. 7

What is the molarity of 0.945 L of a solution that contains 0.227 moles of Fe (NO3) 3?

How much heat is needed to raise the temperature of 7g of water by 18oC?

A piece of charcoal is found to contain 30% of the carbon 14 that it originally had. when did the tree die from which the charcoal came? use 5600 years as the half-life of carbon 14. A (t) = Aoe^kt k<0

Consider the following reaction, for which ∆H° = + 87.9 kJ/mol and ∆S° = + 170.2 J/mol·K. PCl5 (g) → PCl3 (g) + Cl2 (g) Assume ∆H° and ∆S° do not vary appreciably with change in temperature.

Solid lead IV oxide decomposes into solid lead and oxygen gas.

Ab2 has a molar solubility of 3.72*10-4 m. what is the value of the solubility product constant for ab2? express your answer numerically.

Thermal decomposition of sodium azide (NaN₃) into nitrogen gas and sodium metal is used to inflate car airbags. The reaction proceeds by the following chemical reaction. 2NaN₃ (s) ⟶3N₂ (g) + 2Na (s) How many grams of NaN₃ are need to inflate a 10.

Is salt water acidic, basic or neutral

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