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4 years ago

Plz help!!!!!!

Chemistry

1 answer:

Sever21 [200]4 years ago

5 0

this shows that magnesium is higher in the reactivity series than lead.

I don't think there can be an ionic equation written because both components are in solid form and neither is in an aqeuos state.

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Hi i have 5 mins to complete this please help... Take a look at this equation:

VARVARA [1.3K]

Answer:

C: The Fe is not balanced

Explanation:

The reaction expression is given as:

Fe₂O₃ + 3H₂ → Fe + 3H₂O

The problem here is to find the specie that is not balanced.

Number of moles

Specie Reactant Product

Fe 2 1

O 3 3

H 6 6

So, we see that Fe is not balanced.

6 0

3 years ago

Wine goes bad soon after opening because the ethanol in it reacts with oxygen gas from the air to form water and acetic acid , t

Fynjy0 [20]

Answer:

7.00 g

Explanation:

There is some information missing. I think this is the complete question:

Wine goes bad soon after opening because the ethanol CH₃CH₂OH in it reacts with oxygen gas O₂ from the air to form water H₂O and acetic acid CH₃COOH, the main ingredient of vinegar. What mass of ethanol is consumed by the reaction of 4.86g of oxygen gas? Round your answer to 3 significant digits.

First, we have to write the balanced equation.

CH₃CH₂OH + O₂ ⇒ CH₃COOH + H₂O

Then, we can establish the following relations:

The molar mass of O₂ is 32.0 g/mol
The molar ratio of O₂ to CH₃CH₂OH is 1:1
The molar mass of ethanol is 46.1 g/mol.

The mass of ethanol that reacts with 4.86 g of oxygen is:

$4.86gO_{2}.\frac{1molO_{2}}{32.0gO_{2}} .\frac{1molEt}{1molO_{2}} .\frac{46.1gEt}{1molEt} =7.00gEt$

4 0

3 years ago

A mystery object has a density of .75; will it sink or float?

brilliants [131]

Answer:float

Explanation:

8 0

3 years ago

If 72.5 grams of calcium metal (Ca) react with 65.0 grams of oxygen gas (O2) in a synthesis reaction, how many grams of the exce

Natali5045456 [20]

2Ca + O2 = 2CaO
First, determine which is the excess reactant
72.5 g Ca (1 mol) =1.8089725036
(40.078 g)

65 g O2 (1 mol) =2.0313769611
(15.999g × 2)
Since the ratio of to O2 is 2:1 in the balanced reaction, divide Ca's molar mass by 2 to get 0.9044862518. this isn't necessary because Ca is already obviously the limiting reactant. therefore, O2 is the excess reactant.

Now do the stoichiometry
72.5 g Ca (1 mol Ca) (1 mol O2)
(40.078 g Ca)(2 mol Ca)(31.998g O2)

=0.0282669621 g of O2 left over

5 0

4 years ago

Solve for C. C = K -273 K= 37

brilliants [131]

C= -236

Explanation:

k=37.

37-273. 273-37=236

37-273= -236

THEREFORE

The value of C is -236

8 0

2 years ago