All of these elements have an electron configuration<span> that ends with </span><span>s1</span><span>. Francium's properties have not been determined experimentally, because so far there has not been enough of it to experiment with </span>Sodium is group 1/IA, the alkali metals, on the periodic table. Therefore, the other elements in this group will have similar properties as sodium. These would include, lithium<span>, potassium, </span>rubidium<span>, and </span>cesium<span>.
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Explanation:
The given data is as follows.
= 1.5 atm, = 20 L, = (28 + 273) K = 301 K
= 5 atm, = ?, = (50 + 273) K = 323 K
Formula to calculate the volume will be as follows.
=
Putting the given values into the above formula as follows.
=
=
= 0.64 L
Thus, we can conclude that the change in volume of the balloon will be 0.64 L.
Answer: 565.245kJ
To answer this question, you need to know how much water heat capacity which was 4.187 kJ/kg K. First, we need to find the calorie absorbed by water. Since the sample is 1kg, the initial temperature is 21 ∘C and final temperature is 34.5 <span>∘C then the calculation would be:
Energy= (Final temp - initial temp) * heat capacity * mass
Energy = (34.5-21) </span>∘C * 4.187 * kJ/kg K * 1kg= 56.5245 kJ
The energy is made from 0.1 gram, then for 1 gram of energy it should be:
1 gram/ 0.1gram x 56.5245 kJ= 565.245kJ
Atomic mass Ar => 39.948 a.m.u
39.948 g --------------- 6.02x10²³ atoms
?? g -------------------- 3.8x10²⁴ atoms
(3.8x10²⁴) x 39.948 / 6.02x10²³ => 250 g
hope this helps!