Answer:
Solve the following problems (assuming constant temperature). Assume all numbers are 3 sig figs. 1. A sample of oxygen gas occupies a volume of 250 mL at 740 torr pressure. ... the gas exert if the volume was decreased to 2.00 liters? ... A 175 mL sample of neon had its pressure changed from 75.0 kPa to 150 kPa.
Explanation:
The volume of the gas has increased and temperature and volume are directly proportional, thus, the temperature of the gas must also have increased.
We can use the relationship:
V/T = constant
V₁/T₁ = V₂/T₂
200 / (-73 + 273) = 300 / T₂
= 300 K
Answer:
The percentage of germanium in germatite is 6.0003%.
Explanation:
Mass of an ore of germanite = 1.00 grams
Mass of germanium chloride = 0.177 grams
Percentage of germanium in germanium chloride = 33.9%
Let the mass of germanium present in germanium chloride be x.
Percentage of an element in a compound:
![\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BNumber%20of%20atoms%20of%20element%7D%5Ctimes%20%5Ctext%7BAtomic%20mass%20of%20element%7D%7D%7B%5Ctext%7Bmolecular%20mass%20of%20element%7D%7D%5Ctimes%20100)
![33.9\%=\frac{x}{0.177 grams}\times 100](https://tex.z-dn.net/?f=33.9%5C%25%3D%5Cfrac%7Bx%7D%7B0.177%20grams%7D%5Ctimes%20100)
x = 0.060003 grams
Percentage of germanium in an ore of germanite:
![=\frac{0.060003 gram}{1 gram}\times 100=6.0003\%](https://tex.z-dn.net/?f=%3D%5Cfrac%7B0.060003%20gram%7D%7B1%20gram%7D%5Ctimes%20100%3D6.0003%5C%25)
The percentage of germanium in germatite is 6.0003%.
Answer:
“Sodium lauryl sulfate and ammonium lauryl sulfate are surfactant that help with the mixing of oil and water. As such, they can clean the skin and hair by helping water to mix with oil and dirt so that they can be rinsed away or suspend poorly soluble ingredients in water.”
Answer:
A
C
A
Explanation:
Iam not sure if it's correct