1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VLD [36.1K]
2 years ago
13

How many grams of oxygen gas (02) are needed to completely react with 9.30 moles

Chemistry
1 answer:
Luba_88 [7]2 years ago
6 0

Answer:

223 g O₂

Explanation:

To find the mass of oxygen gas needed, you need to (1) convert moles Al to moles O₂ (via the mole-to-mole ratio from reaction coefficients) and then (2) convert moles O₂ to grams O₂ (via the molar mass). When writing your ratios/conversions, the desired unit should be in the numerator in order to allow for the cancellation of the previous unit. The final answer should have 3 sig figs because the given value (9.30 moles) has 3 sig figs.

4 Al + 3 O₂ ----> 2 Al₂O₃
^         ^

Molar Mass (O₂): 32.0 g/mol

9.3 moles Al          3 moles O₂              32.0 g
-------------------  x  ---------------------  x  --------------------  =  223 g O₂
                              4 moles Al               1 mole

You might be interested in
Please choose the correct number (associated with the vocab word) from the drop down menu that matches the definition
baherus [9]

Q1. -------- a specific way that a quantity may increase over time

1. Exponential growth

2. Biotic

3. Trait

4. Succession

Answer:

1. Exponential growth

Explanation:

Exponential growth is a specific way that a quantity may increase over time. The instantaneous rate of change of a quantity with respect to time is proportional to the quantity itself. When growth becomes more rapid in relation to the growing total number, then it becomes exponential.

Example: Latest updates of COVID-19. For today, the number of infected people cases from COVID-19 is 190,000. By observing the graph, to reach 100,000 the number of infected patient cases, it took 3 months and the other 90,000 patients were infected in just 15 days.

Q2. ------- is the inherent inclination of a living organism towards a particular complex behavior.

1. Abiotic

2. Biotic

3. Innate behavior

Answer:

3. Innate behavior

Explanation:

Innate behavior is behavior that occurs naturally in all members of a species. These behaviors do not have to be learned or practiced.

Example: When a human baby born, he already knows how to suck mother breast to get milk. He never learned before. As he grew up, he knows how to grasp things.  

8 0
3 years ago
Does temperature change during a chemical reaction?​
Anarel [89]

Answer: yes

Explanation:

Not all the time, but temperature change can happen during a chemical reaction.

4 0
3 years ago
Read 2 more answers
Metallic crystals are excellent conductors of electricity due to the existence of positive and negative ions.
My name is Ann [436]

the answer is FALSE


4 0
3 years ago
Read 2 more answers
How is freeze dried ice cream made
ollegr [7]
Freeze drying<span> (or lyophilization) removes water from the ice cream by lowering the </span>air pressure<span> to a point where ice sublimates from a </span>solid<span> to a </span>gas<span>. The ice cream is placed in a </span>vacuum chamber<span> and frozen until the water </span>crystallizes<span>. The air pressure is lowered, creating a partial vacuum, forcing air out of the chamber; next heat is applied, </span>sublimating<span> the ice; finally a freezing coil traps the vaporized water. This process continues for hours, resulting in a freeze-dried ice cream slice. </span>
4 0
3 years ago
Differences and similarities between liquid and gas
timurjin [86]
<span>Various gases and liquids have different densities and combustion points.</span>
5 0
3 years ago
Other questions:
  • Determine the molecular weight for Mg(NO3)2
    8·1 answer
  • According to the following reaction, how many grams of water are produced in the complete reaction of 29.7 grams of ammonia? 4 N
    7·1 answer
  • Which is the reason that ionic compounds are brittle? The bonds between the anions and cations are weak and therefore easily bro
    6·1 answer
  • Which is most likely why many scientists reject the cold fusion theory?
    13·1 answer
  • Write 657000 in scientific notation.
    9·1 answer
  • Fran hangs three balloons from strings. She gives the first balloon a positive charge. She gives the second balloon a negative c
    11·1 answer
  • 5. The element copper has naturally occurring isotopes with mass numbers of 63
    12·2 answers
  • ASAP HELP with this question!!!
    15·2 answers
  • How many molecules are in 7V205?​
    10·1 answer
  • What are elements and how many elements discovered
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!