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Rzqust [24]
4 years ago
14

Which two substances are among the six most abundant elements in living

Chemistry
1 answer:
denis23 [38]4 years ago
3 0

Answer:

nitrogen

Explanation:

Living organisms often contain trace amounts of several elements, but the most abundant ones are oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus.

Oxygen. ...

Carbon. ...

Hydrogen. ...

Nitrogen. ...

Sulfur. ...

Phosphorus.

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Answer:

The percent composition for nitrogen in chromium(III) nitrate is 6%.

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3 years ago
What are the characteristics of different classes of chemical reactions?
Ganezh [65]

Answer:

· A chemical reaction is a process generally characterized by a chemical change in which the starting materials (reactants) are different from the products. Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds. There are several different types of chemical reactions and more than one way of classifying them.

Explanation:

6 0
3 years ago
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A sample of an unknown solid is found to have a volume of 24.3 cm3 and a mass of
blondinia [14]
<h2>Answer:  8.93 g/cm³ </h2>

<h3>Explanation: </h3>

Density = mass ÷ volume  

           = 217.0 g ÷ 24.3 cm³  

           = 8.93 g/cm³

∴ the unknown sample of mass 217.0 grams and volume of 24.3 cm³ has a density of 8.93 g/cm³.

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2 years ago
Calculate the mass of water produced by the metabolism of 49.0 g of glucose (C6H12O6). C6H12O6 + 6O2 → 6CO2 + 6H2O
aivan3 [116]
I will mark brainlist please help

1) what is the subject of a sentence?

• the verb

• tells who or what the sentence is about

• the action in the sentence


2) What is the predicate of a sentence?

• who the sentence is about?

• tells what the subject is or does


3) What is the PREDICATE in this sentence.

- Mrs. Shaffer is crazy


• Mrs. Shaffer

• is

• is crazy

• Shaffer is crazy


4) what is the predicate of this sentence.

- Friday is the best day of the week

• Friday

• is the best day of the week


5) What is the subject of this sentence?

- The turtle is swimming in the ocean

• the turtle

• is swimming in the ocean


6) What is the the complete predicate of this sentence?

- The class studied whales.

• class

• the class

• whales

• studied whales


7) What is the predicate in the sentence

- She drank her whole glass of milk

• she

• milk

• drank her whole glass of milk

• drank milk


8) what is the subject in the sentence?

- The music class attended the opera.

• the music class

• attended

• music


9) identify the complete subject.

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• went swimming

• Susan and Kay

• went


10) identify the COMPLETE predicate

- Tina and her friends went to the movies

• Tina

• her friends

• to the movies

• went to the movies


11) identify the SIMPLE PREDICATE PART.

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12) identify the circled line in the sentence.

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2 years ago
Group___are the most stable elements
GarryVolchara [31]

Answer:

Group VIIIA in which the noble/inert gases are found

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