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
ololo11 [35]
3 years ago
11

Help help help :/ Please

Chemistry
1 answer:
krok68 [10]3 years ago
8 0
Super giants have the greatest luminosity!
You might be interested in
A chemist mixes 1.00 g CuCl2 with an excess of (NH4)2HPO4 in dilute aqueous solution . He measures the evolution of 670 J of hea
kaheart [24]

Answer:

\Delta H will be 90054 J

Explanation:

Number of moles = (mass)/(molar mass)

Molar mass of CuCl_{2} = 134.45 g/mol

So, 1.00 g of CuCl_{2} = \frac{1.00}{134.45}mol of CuCl_{2} = 0.00744 mol of CuCl_{2}

0.00744 mol of CuCl_{2} produces 670 J of heat

So, 1 mol of CuCl_{2} produces \frac{670}{0.00744}J of heat or 90054 J of heat

4 0
4 years ago
Heavy elements such as aluminum and carbon were formed by which of these phenomena? A. Big bang B. Fusion in very large star C.
Anton [14]
The answer is D. Supernova.

4 0
3 years ago
How do absolute and apparent magnitude values compare for our sun? Why are the two values different for our sun?
Aliun [14]
The apparent brightness, or apparent magnitude, depends on the location of the observer.Different<span> observers will come up with a </span>different<span> measurement, depending on </span>their<span> locations and distance from the star. Stars that are closer to Earth, but fainter, </span>could<span> appear brighter than far more luminous ones that ...</span>
6 0
3 years ago
Write a word equation for 2ZnS(s)+3O2(g) -&gt; 2ZnS(s) + 2SO3(g)
hjlf

2ZnS(s)+3O2(g) -> 2Zns(s) + 2SO3(g)

the above given equation is unbalanced as it contains 4 moles of sulphur in the output but in the input there are only two aoms of sulphur so to balance the equation we will write the equation as given under

balanced equation is

2ZnS(s)+3O2(g) -> 2Zn(s) + 2SO3(g)


In words:

When 2 moles of solid zinc sulfide reacts with 3 moles of oxygen gas gives 2 moles of solid zinc  and 2 moles of sulphur trioxide gas.

3 0
3 years ago
Which is a substance that is made up of only one type of atom
Natasha2012 [34]

Answer:

An element

Hope I helped x

6 0
3 years ago
Other questions:
  • A chemistry student needsof pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student disc
    11·1 answer
  • Our system is the liquid water contained in a bath tub. The drain is open at the bottom while water is being poured into it at a
    6·1 answer
  • A puddle of water on the sidewalk evaporates and becomes water vapor. the water vapor travels through the air and comes into con
    15·2 answers
  • The process of converting nitrate to nitrogen gas and nitrous oxide is called
    14·1 answer
  • How many moles of o2 are needed for the complete combustion of glucose?
    15·1 answer
  • Write the overall reaction for cellular respiration
    14·1 answer
  • What would happen if there were not enough plants on earth
    14·2 answers
  • The reaction that you will conduct in this experiment is known as a "haloform" reaction. When a methyl ketone is used as a subst
    7·1 answer
  • How does the molecular motion of a sustance change when it goes from liquid to solid?
    9·1 answer
  • Identify the following reactions as combination, decomposition, or combustion reactions
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!