The differential pressure is
797.9 - 715.7 = 82.2 torr = 138815.25 Pa
The height of the mercury in the open-end arm is calculated using
ΔP = ρgh
The density of mercury is 13560 kg/m3
The height of the mercury is
138815.25 Pa = 13560 kg/m3 (9.81 m/s2) h
h = 1.04 m
Answer:
endoplasmic reticulum:
✔ helps in the production and movement of materials
Golgi body:
✔ packages and distributes materials in and out of cell
mitochondrion:
✔ supplies energy that the cell uses
ribosome:
✔ produces proteins for the cell
Explanation:
took test :D
An ionic compound is a chemical compound dissociated into positive and negative ions, but globally neutral (it is a bond that usually involves a metal).
A covalent bond is a bond in which two valence electrons are shared between two non-metals (which is often the case in organic substances). In this type of bond, there must be an electronegativity difference of less than 1.7 on the Pauling scale.
Returning to the question, the first question to investigate is if the substance is simple or compound (all of them are compound).
The next question for the substances is if there's a metallic atom or a carbon atom in the substance.
The next investigation is a confirmation, by calculating the electronegativity difference between the atoms in the substances according to Pauli's scale. If it's under 1.7, it's a covalent bond, so a covalent compound. if not it's an ionic bond, so an ionic compound.
Answer:
0.693kg of CuFeS2 is needed to produce 240 grams of Cu.
Explanation:
In 1 mole of CuFeS2 is associated 1 mole of Cu.
Molar mass of CuFeS2 = 183.5 g/mol
Molar mass of Cu = 63.5g/mol
No of moles of copper present in 240g of chalcopyrite = 240/63.5 = 3.779moles
we know
1 mole of Cu → 1 mole of CuFeS2
in 3.779 moles of Cu → 3.779 moles of CuFeS2
3.779 moles of CuFeS2 = 3.779 * 183.5 = 693.45grams
CuFeS2 in kg = 0.693kg
