Answer:
146g
Explanation:
We're assuming the reaction is occurring with excess chloride. First convert hydrogen mass to moles using molar mass - you need to work with numbers for these sorts of questions:
n = m / MM
n = 2g / 1g/mol
n = 2mol
Now use your stoich ratio to find how many moles of HCL are produced. There are 2 moles of HCl produced for every 1 mole of H2 reacted so:
x HCl / 2 mol H2 = 2 HCl / 1 H2
x = 4mol HCl
Now convert this back into mass using the molar mass of HCl:
m = n x MM
m = 4mol x 36.5g/mol
m = 146g
Answer: 6.65 bullfrogs per square
kilometer
Explanation:
The formula to calculate the population density will be:
= N/A
where,
N = total population = 452
A = land area = 68km²
Therefore, population density will be:
= N/A
= 452/68
= 6.65 bullfrogs per square
kilometer
Answer:
Energy in an ecosystem comes from the Sun.
Explanation:
It is a major source of energy for organisms, plants and the whole ecosystem basically.
