For the reaction h3po4 (aq) h2po4 - (aq) + h + (aq) ∆h° = - 14.2 kj/mol. what is the ka of h3po4 at 60 °c? (a) 4.2  10-3 (b) 6.8  10-3 (c) 8.5  10-3 (d) 1.8  10-2

A 40.5 g block of an unknown metal is heated in a hot water bath to 100.0°C. When the block is placed in an insulated vessel containing 130.0 g of water at 25.0°C, the final temperature is 28.0°C. Determine the specific heat of the unknown metal.

How many mole of copper, Cu are in 3.22 g of copper?

The molecular weight (gram formula weight) for CO is

What is the predominant intermolecular force in the liquid state of each of these compounds: methanol (ch3oh), carbon tetrachloride (ccl4), and hydrogen chloride (hcl) ?

If geologists many small earthquakes in the area near a volcano, what can they infer about the volcano? A. it's dormant B. it is about to erupt C. it is extinct D. it is a good source of geothermal energy

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?