Chemistry High School

28g of aluminum reacts with 45g oxygen

1) complete balanced equation?
2) what is the limiting reactant?
3) how many grams of product could be formed?
4) how many grams of excess would you predict?
5) if you actually measured 50g of product, what is the percent yield?

Answers

Answer 1

Answer:

answer below:

Explanation:

1) 4 Al + 3 O2 --> 2Al2O3.

2) Al mol= 28/27 = 1.037mol

O mol= 45/16 = 2.812mol

Al : O

4 : 2

x : 2.812

cross multiply

4 x 2.812/2  = 5.624 mol of Al

Al is limiting reactant

3) 28/5.246 = 5.34product can be formed (not that much sure)

4) 45/ 0.5185 = 86.79

86.79 - 5.34 = 81.45g

5) 50 / 81.45 x 100 = 61.39% ( i guess)

i hope this hleps you

Related Questions

What kind of reaction is 2H202 → 2H20 + O2?
O A. Decomposition
O B. Single-replacement
C. Double-replacement
O D. Synthesis

Answers

Answer:

this reaction is so the answer should be A

What are the layers of earth including the lithosphere and the asthenosphere?

Answers

Answer:

The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth's structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below

Explanation:

They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.

What is the lanthanide with least mass, periodic table?

Answers

Answer:

Europium/Eu ( not really sure )

The lanthanide element with the least mass is Lutetium (Lu)

Lutetium (Lu) is a member of the lanthanide series, which is a group of 15 elements located in the f-block of the periodic table. The lanthanide series starts with the element Lanthanum (La) and ends with Lutetium (Lu). Lutetium is the heaviest and most dense element in the lanthanide series. Lutetium has an atomic number of 71, indicating that it has 71 protons in its nucleus. It has a relatively high atomic mass of approximately 174.97 atomic mass units (u) according to the periodic table.

Hence, lutetium is the lanthanide element with the least mass.

Learn more about lanthanide elements here:

https://brainly.com/question/28305751

#SPJ 6

Gas in a balloon occupies 3.3 liters. What volume will it occupy if the pressure is changed from 100 kPa to 90.0 kPa, if the temperature is held constant?

Answers

Answer:

3.7 L

Explanation:

Initial volume (V₁) = 3.3 L

Initial pressure (P₁) = 100 KPa

Final pressure (P₂) = 90 KPa

Final volume (V₂) =?

The final volume of the gas can be obtained by using the Boyle's law equation as follow:

P₁V₁ = P₂V₂

100 × 3.3 = 90 × V₂

330 = 90 × V₂

Divide both side by 90

V₂ = 330 / 90

V₂ = 3.7 L

Thus, the final volume of the gas is 3.7 L

Oday, you will observe drops of liquid water and compare them to drops of liquid isopropanol, noting whether either liquid evaporates. Given that the energy transferred in from the air will be the same for both liquids, make a prediction about whether both drops or only one drop will evaporate within five minutes. Explain your prediction below.

Answers

Answer:

Liquid isopropanol.

Explanation:

Liquid isopropanol will evaporate earlier than water because the boiling point of isopropanol is less than water. That liquid which have high boiling point require more heat energy for change into vapor state as compared to those liquids that has low boiling point. The isopropanol has boiling point i.e. 82.5 °C while on the other hand, water has boiling point i.e. 100 °C so we can say that isopropanol will evaporate first.

The liquid that will be the first to evaporate within 5 minutes is; Liquid Isopropanol

We have the 2 liquids as;

Liquid Isopropanol

Liquid water

Now, since we are dealing with the one that will evaporate within five minutes, we need to know their boiling points.

From online research;

Boiling point of liquid isopropanol is 82.5°C

Boiling point of liquid water is 100°C

Now, we are told that the same energy is transferred for both liquids. However, boiling point of the liquid with the lower boiling point will be achieved first and as a result will evaporate first since the next stage after boiling point is evaporation of steam.

Read more at;https://brainly.com/question/25324798

Select odd one out.
I) O
II) Na
III) Cu
IV) Ag

Answers

Explanation:

0 is the odd one...............

and rest are metals and they lose electron and 0 gain electron and is non metal

I) O , is the odd one out because Na, Cu , Ag are all metals while O is a nonmetal ( look from periodic table )

what is the molecular shape of N2O2?

Answers

Answer:

If you're just looking at the Lewis Structure from the perspective of the octet rule, it does appear that the structure is correct. Dinitrogen always has a lone pair of electrons which could conceivably be used for dative bonding as you suggest. So from that perspective there appears to be nothing wrong at all - other than that it doesn't exist in nature in this way.

Explanation:

An organism from the past that is related to all the organisms in the group is called?​

Answers

Answer:

phylogenic trees/phylogeny

Explanation:

the evolutionary history and relationship of an organism or group of organisms is called its phylogeny

how does pentene become pentane?
How does propene become propane?​

Answers

Pentane is derived from the petroleum raw materials, natural gas and crude oil. It is generally marketed in a compressed liquefied form at 99% purity.

What element is in group 4 and period 3

Answers

Group 4 is the second group of transition metals in the periodic table. It contains the four elements titanium (Ti), zirconium (Zr), hafnium (Hf), and rutherfordium (Rf). The group is also called the titanium group or titanium family after its lightest member.

The sound of a trumpet ECHOES off a nearby mountain. This is which type of wave interaction?

Answers

Answer:

reflection

Explanation:

wave reflection is when a sound bounces off something it cannot go through, like echoing

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