Answer:
![\boxed{\text{25. 20 L; 26. 49 K}}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Ctext%7B25.%2020%20L%3B%2026.%2049%20K%7D%7D)
Explanation:
25. Boyle's Law
The temperature and amount of gas are constant, so we can use Boyle’s Law.
![p_{1}V_{1} = p_{2}V_{2}](https://tex.z-dn.net/?f=p_%7B1%7DV_%7B1%7D%20%3D%20p_%7B2%7DV_%7B2%7D)
Data:
![\begin{array}{rcrrcl}p_{1}& =& \text{100 kPa}\qquad & V_{1} &= & \text{10.00 L} \\p_{2}& =& \text{50 kPa}\qquad & V_{2} &= & ?\\\end{array}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Brcrrcl%7Dp_%7B1%7D%26%20%3D%26%20%5Ctext%7B100%20kPa%7D%5Cqquad%20%26%20V_%7B1%7D%20%26%3D%20%26%20%5Ctext%7B10.00%20L%7D%20%5C%5Cp_%7B2%7D%26%20%3D%26%20%5Ctext%7B50%20kPa%7D%5Cqquad%20%26%20V_%7B2%7D%20%26%3D%20%26%20%3F%5C%5C%5Cend%7Barray%7D)
Calculations:
![\begin{array}{rcl}100 \times 10.00 & =& 50V_{2}\\1000 & = & 50V_{2}\\V_{2} & = &\textbf{20 L}\\\end{array}\\\text{The new volume will be } \boxed{\textbf{20 L}}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Brcl%7D100%20%5Ctimes%2010.00%20%26%20%3D%26%2050V_%7B2%7D%5C%5C1000%20%26%20%3D%20%26%2050V_%7B2%7D%5C%5CV_%7B2%7D%20%26%20%3D%20%26%5Ctextbf%7B20%20L%7D%5C%5C%5Cend%7Barray%7D%5C%5C%5Ctext%7BThe%20new%20volume%20will%20be%20%7D%20%5Cboxed%7B%5Ctextbf%7B20%20L%7D%7D)
26. Ideal Gas Law
We have p, V and n, so we can use the Ideal Gas Law to calculate the volume.
pV = nRT
Data:
p = 101.3 kPa
V = 20 L
n = 5 mol
R = 8.314 kPa·L·K⁻¹mol⁻¹
Calculation:
101.3 × 20 = 5 × 8.314 × T
2026 = 41.57T
![T = \dfrac{2026}{41.57} = \textbf{49 K}\\\\\text{The Kelvin temperature is }\boxed{\textbf{49 K}}](https://tex.z-dn.net/?f=T%20%3D%20%5Cdfrac%7B2026%7D%7B41.57%7D%20%3D%20%5Ctextbf%7B49%20K%7D%5C%5C%5C%5C%5Ctext%7BThe%20Kelvin%20temperature%20is%20%7D%5Cboxed%7B%5Ctextbf%7B49%20K%7D%7D)
Amonium= NH4+
Sulphate= SO4-2
Together they form: (NH4)2SO4
the molar mass is: <span>132.14 g/mol</span>
Answer:
Dalton's atomic theory consisted of several postulates.
Explanation:
<span><span>
All matter consists of indivisible particles called atoms.
</span><span>
Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements.
</span><span>
Atoms cannot be created or destroyed.
</span><span>
Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compound atoms.
</span><span>
Atoms of same element can combine in more than one ratio to form two or more compounds.
</span><span>
Atoms are the smallest unit of matter that can take part in a chemical reaction.
</span></span>
Answer:
Rubidium Sulfide
Explanation:
The chemical name for Rb2S is Rubidium Sulfide
Answer:
Because of the existence of isotopes.