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3 years ago

What Element is among the five most abundant element in the sun earth ocean atmosphere and organisms?

Chemistry

1 answer:

larisa86 [58]3 years ago

6 0

Answer:

i would have to say oxygen .

Explanation:

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A powder contains FeSO4 · 7 H2O (molar mass = 278.01 g/mol), among other components. A 3.055 g sample of the powder was dissolve

solong [7]

Answer:

The mass of FeSO4*7H2O is 1.023 grams

Explanation:

Step 1: Data given

Molar mass of FeSO4 * 7H2O = 278.01 g/mol

Mass of Fe2O3 = 0.294 grams

Mass of the sample = 3.055 grams

Step 2: The balanced equation

4 Fe + 3O2 → 2Fe2O3

Step 3: Calculate moles Fe2O3

Moles Fe2O3 = mass Fe2O3 / molar mass Fe2O3

Moles Fe2O3 = 0.294 grams / 159.59 g/mol

Moles Fe2O3 = 0.00184 moles

Step 3: Calculate moles Fe

In 2 moles Fe2O3 we have 4 moles Fe

For 0.00184 moles we'll have 2*0.00184 = 0.00368 moles

Step 4: The balanced equation

Fe + H2SO4 + 7H2O → FeSO4*7H20 + H2

Step 5: Calculate moles FeSO4* 7H2O

For 1 mol Fe we have 1 mol FeSO4*7H2O

For 0.00368 moles Fe we have 0.00368 moles FeSO4*7H2O

Step 6: Calculate the mass of FeSO4*7H2O

Mass FeSO4*7H2O = moles * molar mass

Mass FeSO4*7H2O = 0.00368 moles * 278.01 g/mol

Mass FeSO4*7H2O = 1.023 grams

The mass of FeSO4*7H2O is 1.023 grams

6 0

3 years ago

IT due tomorrow Giving Brianliest!!!!!<br> This is not a eassy!!!!!

Lunna [17]

I’m sorry but I cannot see the picture

6 0

3 years ago

MARKING BRAINLIEST!

blagie [28]

Answer: B) Linda’s speed was slower than Meg’s speed

Explanation: Meg ran almost twice as fast as Linda since she took less time to finish the same amount of distance

8 0

3 years ago

What is the kinetic energy of a 25 kg object moving at a velocity of 2.5 m/s?

vovangra [49]

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

$k = \frac{1}{2} m {v}^{2} \\$

m is the mass

v is the velocity

From the question we have

$k = \frac{1}{2} \times 25 \times {2.5}^{2} \\ = 12.5 \times 6.25 \\ = 78.125 \: \: \: \: \: \: \: \:$

We have the final answer as

Hope this helps you

6 0

3 years ago

Imagine that a single cell below goes through four cell divisions. How many cells are produced? To find out, draw the parent cel

Lisa [10]

16 cells are produced from a single parent cell after the fourth division of the cell.

In biology, the smallest unit can live on its own and that makes up all living organisms and the tissues of the body.

In mitosis type of cell division, one parent cell is divided into two same or different daughter cells. In this way, in the first division, two cells are produced from single parent cells and in the second division, four daughter cells are produced. In the third division, 8 cells are produced from 4 parent cells and in the fourth division, 16 cells are formed from 8 cells.

So we can conclude that 16 cells are produced from a single parent cell after the fourth division of the cell.

Learn more about cell here:

brainly.com/question/13123319

#SPJ1

4 0

2 years ago