The recommended quantity of calcium oxide required to cure most acidic soils is 280 g per square metre If a farmer has a field of acidic soil measuring 120 metres by 65 metres, calculate the mass of calciur
oxide required for this field in kilograms. (1 kg = 1000 g.)
+280=5602
280g

What element breaks down into yttrium-90?

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?