0.249 g of a common diatomic gas occupies a volume of 250. ml at 120°c and 760 mmhg. using a periodic table, what is the identity of this element?

What is the purpose of the lateral line

What are 3 stresses that can affect equilibrium?

Examine the reaction equation. Mg (OH) 2 (s) + HCl (aq) →H2O (l) + MgCl2 (aq) What coefficients will balance the equation? A) 2, 4, 2, 2 B) 1, 2, 3, 1 C) 1, 1, 1, 1 D) 1, 2, 2, 1

The gas-phase decomposition of NOBr has a k = 0.810 M-1 s-1 at 10°C. NOBr (g) → NO (g) + ½ Br2 (g) rate = k[NOBr]2 We start with 0.00200 M NOBr in a flask at 10°C. (a) How many minutes does it take to use up 0.

A gas has a volume of 6.6 L at a temperature of 40 C. What is the volume of the gas if the temperature changes to 15 C?

Compared to a potassium atom, a potassium ion has A) a smaller radius B) a larger radius C) fewer protons D) more protons

Which unit measures mass?

The mechanism for the reaction described by 2N2O5 (g) - - - > 4NO2 (g) + O2 (g) is suggested to be (1) N2O5 (g) (k1) - - - > (K-1) NO2 (g) + NO3 (g) (2) NO2 (g) + NO3 (g) - - - > (K2) NO2 (g) + O2 (g) + NO (g) (3) NO (g) + N2O5 (g) - - - > (K3) 3NO2

Which question can be answered using the scientific method? A) Which dog food is best for healthy teeth? B) What color is the most attractive? C) What is my purpose in life? D) Which flower smells the best?

For the galvanic cell reaction, expressed below using shorthand notation, what half-reaction occurs at the cathode?