Answer:
1. 40.5 grams of O₂ are needed in the reaction.
2. 55.4 grams of CO₂ are produced
Explanation:
C₆H₁₂O₆(aq)+ 6O₂(g) ⟶ 6CO₂(g)+ 6H₂O
1 mol of glucose reacts with 6 moles of oxygen to produce 6 moles of carbon dioxide and 6 moles of water.
Ratio in the reactants is 1:6. Let's convert the mass of glucose to moles.
38 g / 180 g/mol = 0.211 moles
1 mol of glucose needs 6 moles of O₂ to react
Then, 0.211 moles would need (0.211 . 6) /1 = 1.26 moles
Let's convert the moles to mass of O₂
1.26 mol . 32 g / 1mol = 40.5 g
Ratio between oxygen and carbon dioxide is 6:6. Therefore is the same to say 1:1 → 6 moles of O₂ produce 6 moles of CO₂
Then, 1.26 moles of O₂ must produce 1.26 moles of CO₂
Let's convert the moles to mass → 1.26 mol . 44 g / 1mol = 55.4 g
Answer:
- Look up the specific heat capacity of AlF₃
- Calculate ΔT
- Calculate the mass of AlF₃
Explanation:
The formula for for the heat (q) absorbed by an object is
q = mCΔT, where
m = the mass of the sample
C = the specific heat capacity of the sample. and
ΔT = the change in temperature
1. What you must do
- Look up the specific heat capacity of AlF₃
- Calculate ΔT
- Calculate the mass of AlF₃
2. Sample calculation
For this example, I assume that the specific heat capacity of AlF₃ is 1.16 J·K⁻¹mol⁻¹
.
(a) Calculate ΔT
(b) Calculate m
The 25 cm³ solution used in the titration contains 1 tablet
<h3>Quantity</h3>
From the question,
We are to determine the number of tablets that are in 25 cm³ solution of aspirin.
Let the number of tablets be x.
From the given information,
250 cm³ of the aspirin solution contains 10 tablets.
If 250 cm³ of the aspirin solution contains 10 tablets
Then,
25 cm³ of the aspirin solution will contains x tablet(s)
x = tablets
x = tablets
x = 1 tablet
Hence, the 25 cm³ solution used in the titration contains 1 tablet
Learn more on calculating quantity here: brainly.com/question/14606858
Answer:
Pluto if you count it as a planet. Neptune is the next best answer
Explanation:
The key to most "how do I separate." questions is solubility.
The trick is to add a liquid that will only dissolve one substance but not another.
Let's say you had a beaker full of sand, table salt (NaCl), and acetanilide. Is there anything you can add that would only dissolve one of these three substances?
Yes, there is! Acetanilide like most organic compounds, isn't soluble in water. But salt is soluble in water. So to the mixture, I would add water, and then pass the water through a filter. The filter paper will "catch" the sand and acetanilide, but the table salt will remain dissolved in the water. If you then let that water evaporate (either via boiling or under vacuum), you will recover your salt.
So now, how to do you separate the sand from the acetanilide? Sand isn't really soluble in anything, but acetanilide is soluble in organic solvents, such as ethanol. So to the mixture of sand and acetanilide, add ethanol, and pass it through a filter. The sand will once again get stuck in the filter paper, and your acetanilide will be dissolved in ethanol. Remove the ethanol (via vacuum, or rotovap) and you will be left with acetanilide.