1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AveGali [126]
3 years ago
10

I have science and i have a question that says : an element is a (valuable, pure , rare) substance that is not chemically combin

ed with any other elements
Chemistry
1 answer:
mote1985 [20]3 years ago
3 0

Answer:

It’s true ( pure).

Explanation:

An element is defined as a pure substance that is not chemically combined with any other elements. An element comprises of mainly the sane type of atoms.

While a compound is a substance that consists of two or more elements which are chemically combined together. This is the main difference between an element and a compound.

You might be interested in
Water, H2O, is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared __________
adell [148]

Oxygen and hydrogen share electrons in the molecule of water to form covalent bonds.

<h3>What kinds of bonds exist?</h3>
  • Covalent bonds: These are formed between nonmetals and electrons by sharing electrons.
  • Ionic bonds: These are formed between metals, which lose electrons, and nonmetals, which gain electrons.
  • Metallic bonds: There are formed between metals. Electrons are delocalized in a cloud.

Water, H₂O, is a molecule made of 2 nonmetals: oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons, and known as covalent bonds.

Oxygen and hydrogen share electrons in the molecule of water to form covalent bonds.

Learn more about chemical bonds here: brainly.com/question/6071754

5 0
2 years ago
10. A small gold nugget has volume of 0.87 cm3. What is its mass if the density of gold is 19.3 g/cm3?
bulgar [2K]

Answer:

16.791 grams

Explanation:

The density formula is:

d=\frac{m}{v}

Rearrange the formula for m, the mass. Multiply both sides of the equation by v.

d*v=\frac{m}{v}*v

d*v=m

The mass of the gold nugget can be found by multiplying the density and volume. The density is 19.3 grams per cubic centimeter and the volume is 0.87 cubic centimeters.

d= 19.3 g/cm^3\\v-0.87 cm^3

Substitute the values into the formula.

m=d*v

m= 19.3 g/cm^3*0.87 cm^3

Multiply. Note that the cubic centimeters, or cm³ will cancel each other out.

m=19.3 g*0.87

m=16.791 g

The mass of the gold nugget is 16.791 grams.

8 0
3 years ago
How many moles of ag are formed by the complete reaction of 28.3 mol of pb?
levacccp [35]
<span>Answer: 56.6 moles Explanation: 28.3 moles of Pb would produce twice as much moles as Ag. 28.3 X (2moles Ag/ 1 mol Pb) = 56.6 moles of Ag.</span>
4 0
4 years ago
How many carbon atoms are represented in the formula for CaMg3(CO3)4​
Galina-37 [17]
The formula is for 1 Calcium, 3 Magnesium, 4 Carbon, & 12 Oxygen. The 4 after the parenthesis of (CO3) distributes to each element.

Answer : There are 4 Carbon atoms in the formula.
3 0
3 years ago
Which two reactions are opposites of each<br> other?
Alex17521 [72]
Can you provide a picture
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is the balanced chemical equation for photosynthesis?
    9·2 answers
  • What is measured in mercury
    14·2 answers
  • Should someone who lives on the sixth floor of an apartment building be concerned about radon in his or her apartment? Why or wh
    11·1 answer
  • Transverse waves in a sentence
    6·1 answer
  • A _ is a substance with a pH greater than 7
    6·1 answer
  • Is oxygen a necessary reactant for oxidation reaction ​
    13·1 answer
  • Which are functions of the stomata in the leaves of seed plants? Check all that apply.
    13·2 answers
  • How many valence electrons does Ne have
    14·2 answers
  • HURRY PLEASE
    11·1 answer
  • Hello! What’s an electron cloud? I don’t understand why it’s distorted too :/
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!