Answer:
Percentage Yield is calculated by doing -> experimental/theoretical x 100% = percentage yield.
I THINK that if your questions are connected it should be 14/16.89 x 100% = 82.889%
Explanation:
Answer:
3.11 mol/kg
Explanation:
Molality M = number of moles of solute, n/mass of solvent, m
To calculate the number of moles of glycerol (C₃H₈O₃) in 22.75 g of glycerol, we find its molar (molecular) mass, M',
So, M' = 3 × atomic mass of carbon + 8 × atomic mass hydrogen + 3 × atomic mass of oxygen
= 3 × 12 g/mol + 8 × 1 g/mol + 3 × 16 g/mol = 36 g/mol + 8 g/mol + 48 g/mol = 92 g/mol.
So, number of moles of glycerol, n = m'/M' where m' = mass of glycerol = 22.75 g and M' = molecular mass of glycerol = 92 g/mol
So, n = m'/M'
n = 22.75 g/92 g/mol
n = 0.247 mol
So, the molality of the solution M = n/m
Since m = mass of ethanol = 79.6 g = 0.0796 kg, substituting the value of n into the equation, we have
M = 0.247 mol/0.0796 kg
M = 3.11 mol/kg
So, the molality of the solution is 3.11 mol/kg.
Forest Food web consists of the producers, main consumers, secondary consumers, scavengers, and decomposers. Food web is the collection of the large number of food chains.
<h3>What are some examples of food webs?</h3>
Numerous food chains make up a food web. As animals seek food, a food chain only follows one way. As an example, a hawk consumes a snake following the consumption of a frog, a grasshopper, and grass. A food web illustrates the numerous relationships between plants and animals.
<h3>What are the different types of food web?</h3>
1. Primary consumers
2. Secondary consumers
3. Tertiary consumers
4. Decomposers or phytoremediators
To know more about the Forest food chain visit:
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Answer:
Explanation:
there are a certain amount of atoms
An electron has a negative charge of one
An neutron has no charge (hence, neutral)
An proton has a positive charge of one
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