Solve all using two methods each 4. Calculate the mass of anhydrous Na2CO3 in 25.0 cm3 of the saturated solution at 30oC, if its solution at this temperature is 1.80 moldm-3 [Na = 23, C = 12, O = 16]

5.
What volume of a saturated solution of X at 0oC would yield 10.0 g of the dry salt, if the solubility of Y at 0oC is 5.0 moldm-3? [X=160]

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

answer: they produce more slow than unicellular organisms.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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