Answer:
R717
Explanation:
For an equipment room having R717 in the systems, a refrigerant detector is not needed. Provided the mechanical ventilation systems are working continuously so that the leaked refrigerant is being thrown out of the room
B. gain two proton
C. lose two electron
D. gain two electron
a Muslim pilgrim
a book of Sharia laws
an ancient stone temple
Answer: Ka'aba is Muslim pilgrimage
Explanation: Kaaba is a small shrine located in Mecca and is considered as a sacred spot by Muslims.
It is a cube shaped structure made up of graystone and marble. It's corners correspond to the points of a compass and is mostly kept covered with a cloth called kiswah.
Answer:
D. An ancient Stone Temple
Explanation:
Edg 2021
B) 1:2
C)2:1
D)3:1
Answer:
Option A = 1:1
Explanation:
The atoms of calcium and sulphur when react their ration is 1:1. The charge on calcium is +2 and on sulphur is -2.
Ca⁺²S⁻²
The +2 and -2 charges are cancel out and overall charge will be zero.
CaS
so their atomic ratio will be 1:1
Answer: The formula for hypobromite .
Explanation:
Hypobromite is also called as alkaline bromine water with molecular formula of . It is used as germicide and antiparasitic
It is prepared by reacting bromine gas and alkali at 20 °C .
Oxidizing action of hypobromite ions.
The number of atoms in the 6 grams of carbon is equal to 1.506 × 10²³.
The Avogadro number is the proportionality factor which is the number of particles such as atoms, molecules, or ions in one mole of a substance.
Avogadro's number possesses a numeric value of 6.022 × 10²³ reciprocal moles. Avogadro's constant is named by Stanislao Cannizzaro after the scientist Amedeo Avogadro.
Given, the mass of the carbon in sample = 6 g
The number of atoms of one mole of carbon = 6.022 × 10²³
The atomic mass of one mole of carbon = 12 g
It means 12 g of the carbon has atoms = 6.022 × 10²³ carbon atoms
Then 6 grams of carbon will have atoms = (6/12) × 6.022 × 10²³
= 3.011 × 10²³ carbon atoms
Therefore, the atoms of carbon in 6 g of sample of carbon are 3.011 × 10²³ atoms.
Learn more about Avogadro's number, here:
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