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
artcher [175]
3 years ago
10

All substances are made from some 100 different types of atoms which combine with each other in various ways true or false

Chemistry
1 answer:
Svetllana [295]3 years ago
3 0

Answer:

True

Explanation:

You might be interested in
Which tool is most suitable for a chemist to measure the mass of a liquid
I am Lyosha [343]

Chemists use beakers, flasks, burets and pipets to measure the volume of liquids. Plz mark as brainliest

7 0
3 years ago
Read 2 more answers
5) answer is A
Burka [1]

Answer:

A)  positive; added

Explanation:

Based on the reaction:

2NaHCO3(s) + 129kJ → Na2CO3(s) + H2(g) + CO2(g)

<em>2 moles of NaHCO3 requires 129kJ to produce 1 mole of Na2CO3, 1 mole of H2 and 1 mole of CO2.</em>

<em />

That means, the energy must be added being, thus, an exothermic reaction. The exothermic reactions have ΔH >0.

Thus, right answer is:

A)  positive; added

3 0
3 years ago
What is one difference between a mixture and a compound?
tekilochka [14]
D. a compound can only be separated into its components by chemical means
5 0
3 years ago
Read 2 more answers
Which characteristic could distinguish a crystalline solid from an amorphous
Mrac [35]

Answer:

The way it breaks

Explanation:

a-p-e-x

8 0
3 years ago
Under the Doppler Effect, an observer behind a moving wave source observes
disa [49]
Attachment is the answer
3 0
3 years ago
Read 2 more answers
Other questions:
  • Help plz i don't know this
    8·1 answer
  • A typical aspirin tablet contains 500. mg of c9h8o4. how many moles of c9h8o4 molecules and how many molecules of acetylsalicyli
    9·1 answer
  • Help with my science
    9·1 answer
  • 25 Points Please Help ASAP! Will Mark Brainliest If All Are Answered!!
    11·1 answer
  • What is the sum of the coefficients in the balanced chemical equation for the combustion of acetone, c3h6o(l), in air?
    14·1 answer
  • Whats the difference between covalent and ionic bonds
    11·1 answer
  • natural selection is an example of a mechanism of evolution does this mechanism produce a change in individuals or populations e
    10·1 answer
  • 1. What is an air mass? 2. What 2 factors characterize an air mass? 3. What determines the two characteristics of an air mass? 4
    5·2 answers
  • Each element is defined by the number of​
    13·2 answers
  • During a lab exam a student looked through the microscope and identified the following cell parts: circular DNA, ribosomes, cell
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!