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3 years ago

What is the major difference between chemical and physical changes?

1 answer:

5 0

C. New substances are always produced in chemical changes, which is not the case with physical changes. For example, when you cut wood into smaller pieces you still have wood in the end. But, with a chemical change you change the substance's whole composition. For example when you add two hydrogen's to one oxygen you have water and it can't break down from that.

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Explain natural fiber extraction

Alex

Explanation:

natural fibre, any hairlike raw material directly obtainable from an animal, vegetable, or mineral source and convertible into nonwoven fabrics such as felt or paper or, after spinning into yarns, into woven cloth. ... Most textile fibres are slender, flexible, and relatively strong.

6 0

3 years ago

Read 2 more answers

For the following reaction, 25.4 grams of sulfur dioxide are allowed to react with 11.6 grams of water . sulfur dioxide(g) water

Gekata [30.6K]

Answer:

The maximum mass of sulfurous acid that can be formed is 32.54 grams.

Explanation:

The balanced reaction is:

SO₂ + H₂O → H₂SO₃

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

SO₂: 1 mole
H₂O: 1 mole
H₂SO3: 1 mole

Being the molar masses of each compound:

SO₂: 64 g/mole
H₂O: 18 g/mole
H₂SO₃: 82 g/mole

Then, by stoichiometry the following quantities of mass participate in the reaction:

SO₂: 1 mole* 64 g/mole= 64 g
H₂O: 1 mole* 18 g/mole= 18 g
H₂SO₃: 1 mole* 82 g/mole=82 g

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, you can use a simple rule of three as follows: If 18 grams of water react with 64 grams of sulfur dioxide, how much mass of sulfur dioxide does 11.6 grams of water react with?

$mass of sulfur dioxide=\frac{11.6 grams of water*64 grams of sulfur dioxide}{18 grams of water}$

mass of sulfur dioxide= 41.24 grams

But 41.24 grams of sulfur dioxide are not available, 25.4 grams are available. Since you have less mass than you need to react with 11.6 grams of water, sulfur dioxide will be the limiting reagent.

Then you can apply the following rule of three: if by reaction stoichiometry 64 grams of sulfur dioxide produce 82 grams of sulfurous acid, 25.4 grams of sulfur dioxide, how much mass of sulfurous acid will it produce?

$mass of sulfurous acid=\frac{25.4 grams of sulfur doixide*82 grams of sulfurous acid}{64 grams of sulfur doixide}$

mass of sulfurous acid= 32.54 grams

The maximum mass of sulfurous acid that can be formed is 32.54 grams.

7 0

3 years ago

A glow stick contains a glass vial with chemicals. When the glow stick is bent, the vial breaks

Sindrei [870]

Answer:

When you freeze the already cracked glow stick the chemical reactions are slowed down. When you take it out of the freezer and it reaches room temperature the chemical reaction will go on as 'normal'. XD hope this helps

Explanation:

5 0

3 years ago

Which coefficient placed before HCl will balance the following equation? Zn+HCI ZnCl2 + H2

cupoosta [38]

Explanation:

Given chemical equation

Zn + HCL ➡ ZnCl2 + H2

Now balancing

Zn + 2HCL ➡ ZnCl2 + H2

Hope it will help :)❤

3 0

3 years ago

Application: Address incorrect information and explain correct reasoning

Flauer [41]

Atomic radius decreases with the increase of atomic number and mass number because the nuclear charge attracts the outermost shell leads to lower distance of the atom.

<h3>What is the trend of atomic radius across the periodic table?</h3>

Atomic radius decreases when we go from left to right to a period and increases down a group. In a period, effective nuclear charge increases as electron shielding remains the same. An atom gets larger as the number of orbits or shells increases. The radius of atoms increases as you go down the group in the periodic table. The size of an atom will decrease as you move from left to the right in a period. Within a period, protons are added to the nucleus which attracts electrons closer to the nucleus because of its increased positive charge i.e. proton. So that's why we can say that the force of attraction between nuclei and electrons increases, the atomic radius of the atoms decreases.

So we can conclude that Atomic radius decreases with the increase of atomic number and mass number because the nuclear charge attracts the outermost shell leads to lower distance of the atom.

Learn more about atomic radius here: brainly.com/question/15255548

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3 0

1 year ago