15 POINTS!!

Chemistry

2 answers:

Georgia [21]3 years ago

5 0

Plant cells are ovals constantly, but animals cells have no exact shape to them <span />

makkiz [27]3 years ago

4 0

The cell walls are different, plant cells require more rigidity. that's all I know

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A 10 gram sample of iron reacts with oxygen to form 18.2 grams of ferric oxide. How many grams of oxygen reacted?

RoseWind [281]

Answer:

$\boxed {\boxed {\sf 8.2 \ grams}}$

Explanation:

According to the Law of Conservation of Mass, the mass of the products must equal the mass of the reactants.

mass products = mass reactants

In this problem, the reaction is:

$iron + oxygen = ferric \ oxygen$

The reactants are iron and oxygen. We know the mass of the iron sample is 10 grams.

The product is ferric oxide. The mass of the ferric oxide sample is 18.2 grams.

$10 \ g + oxygen=18.2 \ g$

We want to find how many grams of oxygen reacted. We have to get the oxygen by itself. 10 is being added to oxygen. The inverse of addition is subtraction. Subtract 10 from both sides of the equation.

$10 \ g - 10 \ g+ oxygen = 18.2 \ g - 10 \ g$

$oxygen= 18.2 \ g - 10 \ g$

$oxygen= 8.2 \ g \\$

<u>8.2 grams of oxygen </u>reacted with 10 grams of iron to form 18.2 grams of ferric oxide.

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3 years ago

The difference in composition between a weak base and its conjugate acid is

Svetach [21]

A weak Bronsted-Lowry base is a weak proton acceptor, where the proton is in the form of H+, so the conjugate acid formed contains one more H atom and an extra positive charge.
Hope this helps!

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3 years ago

Which statement describes the result of this type of reproduction?

Aleksandr-060686 [28]

I dont see the photo

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3 years ago

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Is Squeezing oranges to make orange juice a chemical or physical change?

a_sh-v [17]

Squeezing just the juices out of the orange, like with your hand or whatever you use, is a physical change. yes :)

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