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3 years ago

Which can be excluded due to the absence of fossil records

Chemistry

1 answer:

xeze [42]3 years ago

8 0

Answer:

a. body of jellyfish

Explanation:

it is because they are made up of 95 percent of water and cannot be stored in rocks as fossil ...plz add my answer as brainliest

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How does the energy of attraction between particles compare with their energy of motion in a gas and in a solid? As part of your

ohaa [14]

The energy of motion predominates in gases, whereas the energy of attraction between particles predominates in solids. In contrast to gases, which lack both defined volume and shape, solids have both.

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What do you mean by solid?

One of the three fundamental states of matter, along with liquid and gas. (Ionized gases or plasmas are occasionally regarded as the fourth state of matter.) Because the energy of atoms lowers when they occupy a reasonably organized, three-dimensional structure, a solid develops from a liquid or gas. Solids differ from liquids and gases in that they have certain properties. For instance, all solids can withstand forces that are parallel or perpendicular to a surface (i.e., normal or shear loads, respectively). These characteristics are influenced by the atoms that make up the solid, their arrangement, and the forces that exist between them.

To know more about states of matter, visit:

brainly.com/question/9402776

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5 0

2 years ago

How many moles are in 345g of Re

andre [41]

Answer:

The number of mole is 1.852moles

Explanation:

To calculate the number of mole, using the formula

n = m/Mm

n - number of mole

m - number of mass

Mm - number of molar mass

The molar mass of Re = 186.207

Then, n = 345g/ 186.207g/mol

n = 1.852mol

4 0

4 years ago

Calculate how to prepare 250.00 ml of approximately 1.0 m hcl solution from the 2.5 m hcl solution. show your work.

Romashka-Z-Leto [24]

250.00 mL) x (1.0 M ) / (2.5 M) = 100 mL

So take 100 mL of 2.5 M HCl and dilute it to 250 mL.

5 0

4 years ago

Read 2 more answers

Evaporation of Cane Sugar Solutions. An evaporator is used to concentrate cane sugar solutions. A feed of 10 000 kg/d of a solut

Vera_Pavlovna [14]

Answer:

Weight of solution produced = 5135 kg

Amount of water removed = 4865 kg

Explanation:

For the balance of mass, the incoming mass of sugar must be equal to the outgoing mass. So, the incoming mass (mi) is 38% of 10000 kg

mi = 0.38x10000 = 3800 kg

The outgoing mass (mo) must be 3800 kg, and it is 74% of the total mass (mt)

mo = 0.74xmt

0.74xmt = 3800

mt = 3800/0.74

mt = 5135 kg

This is the mass of solution produced.

The amount of water removed (wr) is the amount of water incoming (wi) less the amount of water outgoing (wo). Both will be the total mass less the mass of sugar :

wi = 10000 - 3800 = 6200 kg

wo = 5135 - 3800 = 1335 kg

wr = wi - wo

wr = 6200 - 1335

wr = 4865 kg

8 0

4 years ago

Consider the reaction of 35.0 g of iron as follows:

77julia77 [94]

Explanation:

4Fe + 3O2 --> 2Fe2O3

Mass of iron = 35g

How many moles of iron react?

The relationship between mass and moles is given as;

Moles = mass / Molar mass

Molar mass of iron = 56g/mol

Number of moles = 35 / 56 = 0.625 mol

How many moles of oxygen molecules must react?

From the equation of the reaction;

4 mol of Fe reacts with 3 mol of Oxygen molecule

0.625 mol would react with x mol?

4 = 3

0.625 = x

x = 0.625 * 3 / 4 = 0.46875 mol

How many moles of product form?

From the equation of the reaction;

4 mol of Fe reacts to form 2 mol of Fe2O3

0.625 mol would form x mol of Fe2O3

4 = 2

0.625 = x

x = 0.625 * 2 / 4 = 0.3125 mol

What mass of product forms?

Moles = mass / Molar mass

Mass = Molar mass * Moles = 159.69 g/mol * 0.3125 mol = 49.9g

8 0

3 years ago