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Paper 1 | Objectives | 27 Questions
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Paper 1 | Objectives
Christian Religious Knowledge/Education/Studies (CRS/CRK/CRE)
How many orbitals are in the d-sub shell?
An element X has isotopic masses of 6 and 7. if the relative abundance is 1 to 12.5 respectively, what is the relative atomic mass of X?
An atom 23892X decays by alpha particle emission to give an atom Y. The atomic number and mass number of Y are
A. 90 and 234 respectively
B. 91 and 238 respectively
C. 92 and 236 respectively
D. 93 and 238 respectively
If 1 mole of sodium contains 6 x 1023 atoms, how many atoms are contained in 0.6 g of sodium? [Na = 23]
A. 1.56 x 1023
B. 1.56 x 1022
C. 3.6 x 1023
D. 3.6 x 1022
If 20 cm3 of distilled water is added to 80cm 3 of 0. 50 mol dm-3 hydrochloric acid, the new concentration of the acid will be
A. 0.10mol dm-3
B. 0.20mol dm-3
C. 0.40mol dm-3
D. 2.00mol dm-3
Consider the reaction represented by the equation. 2NaHCO3(s) \(\rightarrow\) 2Na2CO 3(S) + CO 2(g) + H2O(g) what volume of carbon (IV)oxide at s.t.p is evolved when 0. 5 moles of NaHCO3 is heated? [Molar volume = 22.4 dm3 at s.t. p]
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