22.21.10 2 / 4
200%
+
(411
(b)
(c)
When molten KBr is electrolyzed, write the reaction and state the product that occurs at
the anode.
(3 marks)
A 1.2 grams of butane, C. H. (FW: 58) was burned in a bomb calorimeter causing an
increase of temperature by 5.5°C. The calorimeter constant is 11.3 kJC" Determine the
enthalpy of combustion of butane
(4 marks)
(d)
A spoon was electroplated with chromium, Cr (FW 52.0) for a period of 5.5 minutes
using a constant current of 2.2 A. Calculate the weight of chromium that will be
electroplated onto the spoon. (Given: Cr + 3e Cr E= -0.740 V)
(4 marks)
أما
Iron oxide an

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

b.final

they are made of gases.

they have a spherical shape.

they make energy through fusion.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.