On the inside of the refrigerator door are NOT required Permanent safety markings
<u>Explanation:</u>
Normally in red color the Permanent safety markings arre done. That are wanted on household refrigerators that accept any refrigerant with an A3 flammability grade such as HCs, on or near any evaporators, any exposed refrigerant tubing, near the machine compartment, and on the exterior of the refrigerator.
Each of these markings shall be in words no short than 6.4 mm (1/4 inch) long. Room residents should remove the place quickly regarding the unexpected release of this refrigerant. "DANGER—Risk of Fire or Explosion. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.” is the quote to be marked in the above specified places.
Answer : A - carboxyl group.
The carbon in the carboxyl group is bonded to a hydroxyl group and also it is double bonded to an oxygen group.
The carboxyl group when it is dissolved in a solution donates it's hydrogen ion(H+ ion). When it is dissolved in water, the carboxyl group loses its H+ ion to form negatively charged ion.
RCOOH + H2O⇄RCOO- + H3O+
Thus the carboxyl group act as an acid when dissolved in water.
Answer:
All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.
Explanation:
Answer:
glucosa
En la fotosíntesis, la energía solar se recolecta y se convierte en energía química en forma de glucosa utilizando agua y dióxido de carbono. El oxígeno se libera como subproducto.
Explanation:
Answer:
(a) HCl is the limiting reactant.
(b) 28.45 g
(c) 19.10 g.
Explanation:
(a) 4HCL(aq) + MnO2(s) ----> MnCl2(aq) + 2H2O(l) + Cl2(g)
Using the relative atomic masses:
4 * (1.008 + 35.45( g of HCl react with (54.983 + 2*15.999) g of MnO2.
145.832 g HCl reacts with 86.981 g MnO2.
So 47.7 g HCl reacts with (86.981 / 145.832) * 47.7 = 28.451 g MnO2.
We have 42.5 g of MnO2 so HCl is the limiting reactant.
(b) The theoretical yield of Cl2 is (70.9 /86.981) * 28.451 = 23.91 g.
(c) The actual yield of chlorine is 23.91 * 0.799 = 19.10 g.