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
Reptile [31]
3 years ago
13

A pure substance made up of molecules of the same kind of atoms is called...

Chemistry
2 answers:
slava [35]3 years ago
5 0

Answer:

All substances that are  made up of the same kind of mole ules are called pure substances.

So what do you mean ?

Explanation:

Brrunno [24]3 years ago
4 0

Answer: all matter is made up of pure substance

Explanation:

You might be interested in
Calculate the approximate enthalpy of the reaction in joules. Estimate that 1.0 mL of vinegar has the same thermal mass as 1.0 m
Nesterboy [21]

Explanation:

The given data is as follows.

   Density of vinegar = 1.0 g/ml

   Specific heat capacity = 4.25 J/g ^{o}C

   T_{1} = 17 ^{o}C,  and   T_{2} = 14 ^{o}C

Relation between enthalpy and specific heat is as follows.

                   \Delta H = mC \Delta T

Hence, putting the values into the above formula as follows.

          \Delta H = mC \Delta T

                  = 25 \times 1.0 \times 4.25 J/g ^{o}C \times -3^{o}C          (as density = \frac{mass}{volume})

                               = - 315 J

Thus, we can conclude that the enthalpy of reaction is -315 J.

As the value is negative so, it means that heat is releasing. Hence, the reaction is exothermic in nature.

5 0
3 years ago
Does biomass energy come from petroleum?
IrinaK [193]
No,Biomass is organic material which has stored sunlight in the form of chemical energy. Biomass fuels include wood, wood waste, straw, manure, sugar cane, and many other byproducts from a variety of agricultural processes. Biomass is a renewable energy source because the energy it contains comes from the sun<span>.</span>
7 0
3 years ago
2. What is critical mass?
Fed [463]

A critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction.

8 0
3 years ago
Element X is in group 2, and element Y is in group 7, of the periodic table. which ions will be present in the compound formed w
12345 [234]

Answer:

Element X has valency 2 while Y Valency 2, element Y has high tendency of gaining electrons for its stability thus the compound formed will be B

elements X is positively charged while Y will be negatively charged

8 0
2 years ago
What atom is the smallest size? A. Li B. Be C. F D. C
s2008m [1.1K]

Answer:

A

Explanation:

lies to the left of periodic table

7 0
3 years ago
Other questions:
  • What is the molecular formula for Tricarbon nonachloride?
    5·3 answers
  • Adding copper or magnesium to aluminum creates an alloy that is _____.
    10·1 answer
  • The answers please, I can't figure it out. please send the answers to the chart.
    10·1 answer
  • Which explains the basis of the Biuret test? a. Under base conditions, copper ions bind to the amino groups of proteins and chan
    7·2 answers
  • On a periodic table, element names are represented by: A. numbers B. chemical symbols C. pictures D. matter
    8·2 answers
  • What is the name of the compound CrPO4 • 5H2O?
    5·1 answer
  • A sample of hydrogen gas contains 4.8 x 1026 molecules of hydrogen. How many moles of hydrogen is this?
    13·1 answer
  • A 3kg ball is kicked at 4m/s squared .How much force is used to move the ball?
    12·1 answer
  • How many moles are in 1.52908x1024 molecules of Potassium phosphate (K3(PO4))?
    7·1 answer
  • Name the commercial use of oxygen
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!