calculate the volume of carbon dioxide of room temperature and pressure obtained from 30 grams of glucose

pantera1 [17]

Okay
Mr (H2O)= 18g
therefore moles of H2O
is 720.8/18= 40.04mol
the ratio of H2 to O2 to H2O is
2 : 1 : 2
so moles of H2 is same as H2O here
H2= 40.04moles

moles of O2 is half
so 40.04 x 0.5
20.02moles

grams of O2 is
its moles into Mr of O2
that's 20.02 x 32 = 640.64g

6 0

2 years ago

galvanic cell is powered by the following redox reaction: (g) (aq) (l)(aq) (s) (aq) Answer the following questions about this ce

kotykmax [81]

Answer:

Explanation:

1. the 1/2 reaction that occurs at the cathode

3Cl2(g) +6e^- -------------> 6Cl^- (aq)

2 the 1/2 reaction that occurs at the anode

2MnO2(s) + 8OH^-(aq) ----------> 2MnO4^- (aq) + 4H2O(l) +6e^-

E0 = -0.59v

3Cl2(g) +6e^- -------------> 6Cl^- (aq)

E0 = 1.39v

3Cl2 (g) + 2MnO2 (s) + 8OH^(−) (aq)---------> 6Cl^(−) (aq) + 2MnO4^(−) (aq) + 4H2O (l)

E0cell = 0.80v

5 0

2 years ago

*multiple choice*

galben [10]

1.95 or 2 is the molarity of a 45.3g sample of KNO3 (101g) dissolved in enough water to make a 0.225L solution.

The correct answer is option b

Explanation:

Data given:

mass of KN $O_{3}$ = 45.3 grams

volume = 0.225 litre

molarity =?

atomic mass of KNO3 = 101 grams/mole

molarity is calculated by using the formula:

molarity = $\frac{number of moles}{volume of the solution}$

first the number of moles present in the given mass is calculated as:

number of moles = $\frac{mass}{atomic mass of 1 mole}$

number of moles = $\frac{45.3}{101}$

0.44 moles of KNO3

Putting the values in the equation of molarity:

molarity = $\frac{0.44}{0.225}$

molarity = 1.95

It can be taken as 2.

The molarity of the potassium nitrate solution is 2.

7 0

2 years ago

Which of the following is not a form of radiation? Radio waves or sound waves or microwaves or gamma waves

Svetlanka [38]

Sound waves.
Radio waves and Microwaves are non-ionizing radiation. Gamma waves are ionizing radiation

3 0

2 years ago

The electron configuration for aluminum (Al) is shown below:

Serjik [45]

Answer:

It is the third choice

Explanation:

Just did assignment

3 0

3 years ago

calculate the volume of carbon dioxide of room temperature and pressure obtained from 30 grams of glucose​

calculate the volume of carbon dioxide of room temperature and pressure obtained from 30 grams of glucose