Answer:
Criteria for the implementation of drinking water:
- where drinking water comes from and its quality
- technical intervention
- hygiene education for community
- regulations, laws and managements
- routine water sampling and analysis
Limitations:
- availability of resources (human, finance, equipment)
- geographical conditions
- climatological conditions
- community and authority participation
- communication and transport infrastructure
Explanation:
For more information:
- https://www.who.int/water_sanitation_health/dwq/gdwqvol32ed.pdf?ua=1
- https://www3.epa.gov/region1/eco/drinkwater/your_drinkwater_source.html
The atomic weight is numerically equivalent to the molar mass.
therefore molar mass of gold is - 197.2 g/mol
avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units. These units could be atoms making up elements or molecules making up compounds.
1 mol of gold is made of 6.022 x 10²³ atoms of gold
since 1 mol weighs 197.2 g
therefore if 197.2 g of gold contains - 6.022 x 10²³ atoms of gold
then 7.5 g contains - 6.022 x 10²³ x 7.5/ 197.2 = 2.29 x 10²² atoms of gold
answer is 2.29 x 10²² atoms of gold
Answer: The correct answer is true.
Explanation:
There are two types of reactions based on the heat absorbed or released:
1. Exothermic reactions: In these reactions, heat is released. The energy of the products is less than the energy of the reactants. The 
for these reactions is negative.
2. Endothermic reactions: In these reactions, heat is absorbed by the reactants. The energy of the products is more than the energy of the reactants. The for these reactions is positive.
In the given equation:
The energy is written on the product side, which means that the heat is released in the reaction. Hence, the given equation is a exothermic reaction.
Therefore, the given statement is true.
The right answer for the question that is being asked and shown above is that: "b. positive or negative charge" An isotope undergoes radioactive decay by emitting radiation that has no mass. The other characteristic does the radiation have is that b. positive or negative charge
Answer:
Explanation:
From the question we are told that:
Chemical Reactions:
X=A⇌B,ΔG= 14.8 kJ/mol
Y=B⇌C,ΔG= -29.7 kJ/mol
Z=C⇌D,ΔG= 8.10 kJ/mol
Since
Hess Law
The law states that the total enthalpy change during the complete course of a chemical reaction is independent of the number of steps taken.
Therefore
Generally the equation for the Reaction is mathematically given by
Therefore the free energy, ΔG is
