Answer:
1. 67.2 kJ/mol
Explanation:
Using the derived expression from Arrhenius Equation

Given that:
time
= 8.3 days = (8.3 × 24 ) hours = 199.2 hours
time
= 10.6 hours
Temperature
= 0° C = (0+273 )K = 273 K
Temperature
= 30° C = (30+ 273) = 303 K
Rate = 8.314 J / mol
Since 
Then we can rewrite the above expression as:








Answer:
The number and the kinds of atoms in the compound
Explanation:
- A chemical formula of a compound contains symbols o the atoms of the elements present in the compound as well as the number of atoms of each element in the form of subscripts.
- Therefore it helps us to know the elements in a compound and the number of atoms in the compounds.
PH indicators detect the presence of H+ and OH-. They do this by reacting with H+ and OH-: they are themselves weak acids and bases. If an indicator is a weak acid and is coloured and its conjugate base has a different colour, deprotonation causes a colour change.
Answer:
Sulfur reacts with oxygen to form sulfur dioxide. When nonmetals reactwith one another, the product is a molecular compound. Often, the nonmetal reactants can combine in different ratios and produce different products. Sulfur can also combine with oxygen to produce sulfur trioxide.
<u>Answer:</u> The number of atoms in spherical gold nano particle are 
<u>Explanation:</u>
- To calculate the volume of sphere, we use the equation:

where,
r = radius of the sphere =
(Conversion factor:
)
Putting values in above equation, we get:

- To calculate mass of of the substance, we use the equation:

Volume of gold = 
Density of gold = 
Putting values in above equation, we get:

- To calculate the number of moles, we use the equation:

Mass of gold = 
Molar mass of gold = 196.97 g/mol
Putting values in above equation, we get:

- According to mole concept:
1 mole of an element contains
number of atom
So,
moles of gold will contain =
number of atoms.
Hence, the number of atoms in spherical gold nano particle are 