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
nadya68 [22]
2 years ago
9

Alan wants to identify an unknown solid compound. Which statement correctly describes a method he could use to identify the comp

ound?
A: he could find the temperature at which the compound melts because pure substances have definite melting points

B: he could find the mass of the sample because pure substances have definite masses

C: he could use a mesh screen to filter out the different elements that make up the compound

D: he could melt the compound because melting allows the elements of a compound to seperate
Chemistry
1 answer:
vfiekz [6]2 years ago
8 0

A: he could find the temperature at which the compound melts because pure substances have definite melting points

You might be interested in
Please I need this help me​
BaLLatris [955]

Answer:

first of all is that really chemistry

3 0
3 years ago
Calculate the percentage error in the molar mass of our natural gas which is 16.9g/mol
taurus [48]

Answer:

no examination in 16.9g in molicube i n gas

Explanation:

sana po makatulong po sa inyo

5 0
3 years ago
Why is it better to use the metric system, rather than the English system, in scientific measurement?
frez [133]
The metric system is based on powers of 10 so it is much easier to convert units, often just by moving the decimal point.
3 0
2 years ago
Read 2 more answers
A(n) _____ is a natural object that orbits another object in the solar system besides the Sun.
Stolb23 [73]
The answer is the moon

4 0
3 years ago
Calculate the mass of beryllium (Be) needed to completely react with 18.9 g nitrogen gas (N2) to produce Bez N2, which is the on
choli [55]

Answer:

C = 18.29 g  

Explanation:

Given data:

Mass of beryllium needed = ?

Mass of nitrogen = 18.9 g

Solution:

Chemical equation:

3Be + N₂    →    Be₃N₂

now we will calculate the number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 18.9 g/ 28 g/mol

Number of moles = 0.675 mol

Now we will compare the moles of nitrogen and Be from balance chemical equation.

                     N₂        :       Be        

                       1          :       3

                  0.675       :      3/1×0.675 = 2.03 mol

Number of moles of Be needed are 2.03 mol.

Mass of Beryllium:

Mass = number of moles × molar mass

Mass = 2.03 mol ×   9.01 g/mol

Mass = 18.29 g  

4 0
2 years ago
Other questions:
  • What is the empirical formula of the compound with the molecular formula c18h36?
    5·1 answer
  • Which of the following is true of science? (2 points)
    14·1 answer
  • What are the ionic bonds
    6·1 answer
  • Which statement best explains why water has a higher boiling point than ethane?
    10·2 answers
  • How many grams are 53.8 of oxygen
    14·1 answer
  • What is the initial material of hydraulic lime?
    13·1 answer
  • HELP ME PLEASE. no links.
    15·1 answer
  • Please help me with chemistry
    11·1 answer
  • ¿Cuál de las siguientes NO es una característica de los ácidos?
    8·1 answer
  • Which of the following is not an example of weathering?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!