Answer:
mg3n2 and cacl3 hope it helps
2074.74 kg is the mass of siderite in which 1x10^3 kg of iron is present.
Explanation:
Mass of iron is given as 1x10^3 Kg
mass of iron in siderite FeCO3 can be known
number of moles in 1x10^3 Kg iron is calculated by the formula.
number of moles =
atomic weight of iron is 55.84
number of moles =
n= 17908.309 moles of iron in 1000 kg
1 mole of FeCO3 has 1 mole of Fe
x moles of FeCO3 will have moles
=
x = 17908.309 moles of FeCO3 is there.
so mass can be calculated as number of moles x molar mass of one mole of the substance. (molar mass of siderite is 115.854 grams/mole)
17908.309 x 115.854
= 2074749.230 grams of siderite
(the molar mass is converted to kg/mole as the mass of iron is given by kg.
0.1158 kg is the molar mass of siderite)
2074749.230 grams of siderite is converted to kilogram
2074.74 kg is the mass of siderite in which 1x10^3 kg of iron is present.
Answer:
The correct answer is C. Air pressure. :)
Explanation:
Air preasure is the amount of gravitational force acting against an object.
Aluminum is very rare in its free form. Aluminum contribute greatly to the properties of soil, where it is present mainly as insoluble aluminum hydroxide. Aluminum is a reactive metal and it is hard to extract it from its ore, aluminum oxide (Al2O3).
mark brainliest :)
Answer:
<u>Option B is correct</u>
Explanation:
Step 1: Define volatility
In chemistry, the term volatility, is a way to describe how readily a substance transitions from a liquid phase to a gas phase, also called evaporating.
At a given temperature and pressure, a substance with high volatility is more likely to evaporate more quickly , while a substance with a lower volatility is more likely to be a liquid or solid, so not to evaporate or slower.
The higher the volatility, the higher the (vapor) pressure of a compound. Increasing temperature means the vapor pressure will also increase,
Step 2: In this case:
⇒ O<u>ption A is false</u> because the pressure will be higher when volatility is higher.
<u>⇒ Option B is correct</u> because higher volatility means evaporating more quickly
<u>⇒ Option C is false</u> because higher volatility means higher pressure. When pressure increases, the surface tension decreases.
<u>⇒ Option D is false</u> because when the volatility is higher, the liquid/gas escape the container, easier, so there will be less resistance.