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 clothing and we proper shielding work with small amounts of radioactive compound All of the abuse are true. In a certain nuclear reaction. 0.100g of mass is conversion to energy. How much energy was released (c = 3.0 times 10^0 m/s)? 9.0 times 10^0kJ 9.0 times 10^12kJ 9.0 times 10^15kJ 3.0 times 10^0kJ What it the approximate mass defect, in g/mol nuclei. of H- 2? (H- 2 atomic mass = 2.0141amu; e mass = 5.49 times 10^4amu; p mass = 1,0073amu: n mass = 1.0087amu) 0.0019 0.0014 0.0030 0.0024 Mg(s) + Pb^2n(aq) rightarrow Mg^2+(aq) + Pb(s) For the above reaction, the cathode electrode __: and the anode electrode __. must be Pb: must be Mg muss be Mg: muss be Pb may be an inert material: muss be Mg muss be Pb: may be an men material must be Mg: may be an inert material Mg(s) + Pb^2n(aq) rightarrow Mg^2+ (aq) + Pb(s) If the above galtanic cell starts at standard state conditions. E increases became Q increases. E decreases because Q decreases. E increases because Q decreases. E decreases became Q increases.

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

24)
mass = 2.0141 amu

number of proton = atomic number of H = 1
mass of proton = 1.0073 u

number of neutron = mass number - atomic number = 2 - 1= 1
mass of neutron = 1.0087 u

m =mass of protons + mass of neutrons - mass of atom
= 1*1.0073 + 1*1.0087 - 2.0141
=0.0019 u

Answer: A

25)
Ay cathode reduction occurs. SO cathode is Pb
anode is Mg
Answer: A

I am allowed to answer only 1 question at a time

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