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2 years ago

Which of the following represents a chemical change?

Chemistry

2 answers:

maw [93]2 years ago

6 0

That Answer would be...

C. Fireworks exploding

because this is a chemicals change the creates the fireworks.

Kitty [74]2 years ago

5 0

Answer: Option (c) is the correct answer.

Explanation:

A change that does not bring any difference in chemical composition of a substance are known as physical properties.

For example, shape, size, mass, volume, density, etc of a substance are all physical change.

And, a change in which there occurs a difference in chemical composition of a substance then it is known as chemical change.

For example, precipitation, reactivity, toxicity etc are chemical change.

Fireworks exploding is a chemical change.

Thus, we can conclude that out of the given options fireworks exploding represents a chemical change.

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Because the phosphate group and its attachments are either charged or polar, the phospholipid head is blank, which means it has

schepotkina [342]

The phospholipid head is hydrophilic which means it has an affinity for water. And it is true.

<h3>What is phospholipid , its component and how come it is hydrophilic?</h3>

Phospholipid contains of a head and a tail , the head part of phospholipid consist of phosphate group and for further clarification the tail part of phospholipid consist of fatty acids.
As we know already phosphate group that is OH- is negatively charged which clearly which its head is going to be polar .
Since its polar , its hydrophilic. There is a specific function performed by phosphate group that cannot be filled by other compound present simultaneously.
Phosphate group grabs a role to provide space to other compounds too.

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6 months ago

Osmium has a density of 22.6 g/cm^3. What volume (in cm^3) would be occupied by a 21.8 g sample of osmium?

Snowcat [4.5K]

0.9645 cm³ is the occupied volume by a 21.8 g sample of osmium of density of 22.6 g/cm^3.

Given values are:

Mass, m = 21.8 g
Density, d = 22.6 g

Density is given by,

$density = \frac{mass}{volume}$

⇒ $volume = \frac{mass}{volume}$

⇒ $volume = \frac{21.8}{22.6}$

⇒ $volume = 0.9645 cm^3$

∴The volume is 0.9645cm^3

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1 year ago

Name gaseous element in period 2 group 16?

Sholpan [36]

Answer:

mark me as a brainlist answer

Explanation:

Oxygen

3 0

2 years ago

Balancing Equations help (please explain)

klemol [59]

Answer:

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.

Explanation:

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2 years ago

Which of the following is a consequence of humans using fossil fuels

marusya05 [52]

Answer:

Explanation:

Following are a few consequences of fossil fuels

1. It causes air pollution.

2. When they are burned, they produce toxic substances which leads to global warming.

3. Waste products are hazardous to public health and environment.

4. They are non - renewable and unsustainable.

5. Drilling fossil fuels is a dangerous process

Hope this helps

plz mark as brainliest!!!!

8 0

2 years ago