Which of the following statements is false? To protect yourself from radioactivi

Question

Which of the following statements is false? To protect yourself from radioactivity, keep distance between you and the radioactivity wear proper closing and use proper shielding work with small amounts of radioactive compound All of the above are true. In a certain nuclear reaction. 0.100g of mass is converted to energy. How much energy was released (c = 3.0 times 10^8 m/s)? 9.0 times 10^9 kJ 9.0 times 10^12 kJ 9.0 times 10^1 kJ 3.0 times 10^6 kJ What is the approximate mass defect in g/mol nuclei, of H- 2? (H-2 atomic mass = 2.014lamu; c mass = 5.49 times 10^-4 amu; p mass = 1.0073amu; n mass = 10087amu) 0.0019 0.0014 0.0030 0.0024 For the above reaction, the cathode electrode: and the anode electrode. must be Pb; must he Mg must be Mg; must be Pb mass be an inert material; must be Mg must be Pb; may be an inert material must be Mg. may be an inert material 26 Mg(s) + Pb^2+(aq) rightarrow Mg^2+(aq) + Pb(s) If the above galvanic cell starts at standard state conditions, . E increases because Q increases. E decreases because Q decreases. E increases because Q decreases. E decreases because Q increases. Which of the following statement true? E is 0 at equilibrium. E* does not depend on the amount of moles E* for a reaction is a constant for a given T; E is not. E depends on the concentration and the T. All of the above are true Which statement is true for the reaction? Cu^2+ is oxidized. Cu^2+ is the reductant. Cu^2+ is reduced. Fe_(s) is reduced. The oxidation number of Cl in KClO is +1 -1 +3 +5 When the following redox equation is balanced (acidic conditions), what is the coefficient of the ferric ion ? 1 2 3 4 When the following redox equation is balanced (acidic conditions), what is the coefficient of the ferric ion ? 1 3 5 8 Manganese has the oxidation number of *6 in MnF_6^3- MnO_4^2- Mn_2O_7 Mn(CN)_6^-

Explanation / Answer

22)
All of these are important for protection
Answer: D

23)
m = 0.100 g = 1*10^-4 kg

E = m*c^2
= 1*10^-4 * (3*10^8)^2
= 9.0*10^12 J
= 9.0*10^3 KJ
Answer: A

I am allowed to answer only 1 question at a time

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