How does a scientific theory compare to a scientific law?

Answers

Answer 1

Answer:

Answer:

Explanation:

Scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept.

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Calculate the percentage of iron in iron (III) sulphate

Answers

Answer:

28.01 percent

Explanation:

Iron (III) sulphate, $Fe_2(SO_4)_3$ , has 2 atoms of Fe.

One atom of Fe has a molar weight of 56. Hence, 2 atoms of Fe would have a total molar weight of 56 x 2 = 112 g/mol

Molar weight of $Fe_2(SO_4)_3$ = 399.88 g/mol

Percentage Fe in $Fe_2(SO_4)_3$ = 112/399.88 x 100%

= 28.01%

The percentage of iron is iron (III) sulphate is, therefore, 28.01 percent.

A(n) _____ reaction is a self-sustaining series of chemical reactions in which the product of one reaction are the reactsnts in the next reaction.* not a multiple choice *

Answers

Answer : The answer is, Chain reaction.

Explanation :

Chain reaction : It is defined as the series of successive elementary processes in which the active intermediate species are consumed and regenerated before the products are obtained.

It is a self-sustaining series of the chemical reactions where the product obtained from one reaction are the reactants in the next reaction and so on.

Hence, a chain reaction is a self-sustaining series of chemical reactions in which the product of one reaction are the reactants in the next reaction.

it is called a Chain reaction

Gasoline is a mixture composed primarily of hydrocarbons such as isooctane, which is also known as 2,2,4-trimethylpentane.Gasoline is assigned a number called an octane rating. Gasoline with an octane rating of 87 performs the same as a mixture that consists of 87% isooctane and 13% heptane.
An alternative fuel, E-85, can be used in some automobiles. This fuel is a mixture of 85% ethanol and 15% gasoline.

State the octane rating of a gasoline sample that performs the same as a mixture consisting of 92% isooctane and 8% heptane.
Identify the functional group in a molecule of ethanol in the alternative fuel E-85.

Answers

Because of the 92% isooctane, the gasoline sample's octane rating is 92.The functional group in ethanol is the hydroxyl group.

1) 0.143 g Mg into atoms
2) 0.101 kg Ti into atoms

Answers

Answer:

The answer to your question is below

Explanation:

1) 0.143g of Mg into atoms

- Look for the atomic number of Magnesium in the Periodic table

Atomic number = 24.31 g

-Use the Avogadro's number to find the number of atoms

24.31g ------------------- 6.023 x 10²³ atoms

0.143 g ----------------- x

x = (0.143 x 6.023 x 10²³) / 24.31

x = 8.613 x 10²² / 24.31

x = 3.54 x 10²¹ atoms

2) 0.101 kg of Ti into atoms

-Look for the atomic number of Titanium in the Periodic table

Atomic number = 47.87 g

-Use the Avogadro's number to find the number of atoms

47.87 g --------------------- 6.023 x 10²³

101 g ---------------------- x

x = (101 x 6.023 x 10²³) / 47.87

x = 6.08x 10²⁵ / 47.87

x = 1.27 x 10²⁴ atoms

Which of the following bodily organs or systems can be affected by ionizing radiation? Glands,
Eyes,
Genitals,
Nervous system,
Gastrointestinal system?

Answers

The correct answer is the fourth option. The nervous system is the system in the body which can be affected by ionizing radiation. Exposure to this kind of radiation may lead to changes in motor function or neurological disorders.

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