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Which of these atoms has the largest number of neutrons in the nucleus? (a) <sup>148</sup>Eu (b) <sup>157</sup>Dy (c) <sup>149</sup>Nd (d) <sup>162</sup>Ho (e) <sup>159</sup>Gd
d,e
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1. Calculate the pH of the solution with (H<sup>+</sup>)= 1.0 x 10<sup>-3</sup> 2. Calculate the pH of the solution with (H<sup>+</sup>)= 3.6 x 10<sup>-5</sup>
pH= -log[H+]pH= -log[1×10^-3]pH= 32) pH= -log[3.6×10^-5]pH= 5-log3.6pH= 4.44
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If AgCN is added to water it found however, that 1 liter of solution contains x mole of AgCN, the solubility product is a) 4x<sup>3 </sup>b) x<sup>2</sup> c) x<sup>4</sup> d) 27x<sup>5</sup>
a) 4x3
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A sample of nitrogen gas occupies a volume of 2.50 L at 25 <sup>0 </sup>C. If the pressure is held is held constant, what volume does the gas occupy?
V1/T1 = V2/T22.5/298 = V2/368V2 = 2.5×368/298 V2 = 3.087L
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A sample of oxygen occupies 47.2 litres under a pressure of 1240 torr at 25<sup>o</sup>C. What volume would it occupy at 25<sup>o</sup>C if the pressure were decreased to 730 torr?
In this question, temperature, T does not change (is constant) hence only pressure, P and volume, V changes.In that case we apply Boyle's Law, P1V1=P2V2P1=1240 torrentP2=730 torrentV1=47.2 LV2 = P1V1/P2...
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<sup>?</sup><sub>?</sub>? +<sup>14</sup><sub>7</sub>N ⇒ <sup>17</sup><sub>8 </sub>O+ <sup>1</sup><sub>1</sub>H<sub> </sub>
147N+42He→178O+11H714N+24He→817O+11H is an example of a fission reaction
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Identify the 4 quantum numbers from the given electronic configurations a. 3p<sup>3</sup> b. 5p<sup>5</sup> c. 4s<sup>2</sup> d. 3p<sup>1</sup>
Energy (n), angular momentum (ℓ), magnetic moment (mℓ), and spin (ms).
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A gas sample occupies a volume of 15.0 L at 30 <sup>o</sup>C and 750 torr. At what temperature will this gas occupy a volume of 25.0 L at the same pressure?
volume V1 =12.0 L temperature T1 = 25°C = 273 K and Pressure = 750 torr.new volume V2 =15.0 L at 750 torrtemperature T2 = ?combined gas law saysV1/T1 = V2/T2T2 =...
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A container of 10 litres has a volume expressed in m<sup>3</sup> A. 1m<sup>3</sup> B. 0.01m<sup>3</sup> C. 0.001m<sup>3</sup> D. 0.0001m<sup>3</sup>
1 cubic metre =1000 litres10l = 1×10/1000 = 0.01B. 0.01m3
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At standard temperature and pressure (0 ∘C and 1.00 bar), 1.00 mol of an ideal gas occupies a volume of 22.7 L. What volume would the same amount of gas occupy at the same pressure and 30 ∘C ?
t(0)=0 С T=273 K p=1.00 bar V=22.7 l N=1 mol t(1)=30 С T=303 K Find V=? According to the Boyle-Mariotte law P(0) V(0)/T(0) = const If p=const V(0)/T(0)= V(1)/T(1) V(1)=V(0)T(1)/T(0)=22.7...
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