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
kotegsom [21]
3 years ago
5

When 2.50 grams of copper reacts with oxygen?

Chemistry
1 answer:
ycow [4]3 years ago
7 0
 <span>Mass oxigen = 2.81 - 2.50 = 0.31 g 
Moles O = 0.31 g / 15.9994 g/mol =0.0194 

moles Cu = 2.50 g / 63.546 g/mol =0.0393 

we divide by the smallest number 
0.0194 / 0.0194 = 1 => O 
0.0393 / 0.0194 = 2 => Cu 
the formula is Cu2O ( Copper (I) oxide )
Ya got this</span>
You might be interested in
if you were one of the immigrants, would you willingly submit to have yourself undergone x-ray to prove yourself being a minor?
MariettaO [177]

Answer:

I'm pretty sure this is a question about your opinion so there is no wrong answer! Just think about the question and if you were in those shoes. There is no right or wrong answer! :)

Explanation:

3 0
3 years ago
im found only in plant cells im as green as can be i make food for the plant using the suns energy what am i?
Cloud [144]

im found only in plant cells im as green as can be i make food for the plant using the suns energy what am i?

ANS:-Chloroplast

7 0
3 years ago
Read 2 more answers
Carry out the following operations as if they were calculations of experimental results and express each answer in standard nota
Shalnov [3]

Answer:

1. 10.6\; \rm m (one decimal place.)

2.0.79\; \rm g (two decimal places.)

3. 16.5\;\rm cm^2 (three significant figures.)

Explanation:

<h3>1.</h3>

The first and second expressions are additions and subtractions. When adding two numbers, the accuracy of the result is given by the number of decimal places in it. The result should have as many decimal places as the input with the least number of decimal places.

For example, in the first expression:

  • 5.6792\;\rm m has four decimal places.
  • 0.6\; \rm m has only one decimal place.
  • 4.33\; \rm m has two decimal places.

Therefore, the result should be rounded to one decimal place. Note that these units are compatible for addition, since they are all the same. The result should have the same unit (that is: \rm m.)

Therefore:

\rm 5.6792\; m + 0.6\; m + 4.33\; m \approx 10.6\; \rm m. (Rounded to one decimal place.)

<h3>2.</h3>

Similarly:

  • \rm 3.70\; \rm g has two decimal places.
  • 2.9133\; \rm g has four decimal places.

Therefore, the result should be rounded to two decimal places. Its unit should be \rm g (same as the unit of the two inputs.)

\rm 3.70\; g - 2.9133\; g \approx 0.79\; \rm g. (Rounded to two decimal places.)

<h3>3.</h3>

When multiplying two numbers, the accuracy of the result should be based on the number of significant figures in it. The result should have as many significant figures as the input with the least number of significant figures. In this expression:

  • 4.51\; \rm cm has three significant figures.
  • 3.6666\; \rm cm has five significant figures.

Therefore, the result should have only three significant figures.

The unit of the result is supposed to be the product of the units of the input. In this expression, that unit will be \rm cm \cdot cm, which is occasionally written as \rm cm^2.

\rm 4.51 \; cm \times 3.6666 \; cm \approx 16.5\; \rm cm^2. (Rounded to three significant figures.)

7 0
3 years ago
An ideal reversible heat pump is taking heat from the outside air at -14.0°c and discharging it into the house at 20.0°c. what i
just olya [345]

the coefficient of performance of this heat pump is 8.61.

<h3>What is Heat pump ?</h3>

The air source heat pump converts heat from the ambient air into a low-temperature liquid refrigerant. The pump compresses the liquid to raise its temperature using power. To release the heat it had been holding, it then condenses back into a liquid. Your underfloor heating system or radiators get heat.

coefficient of performance -The usable heating or cooling delivered to work (energy) needed ratio, also known as the coefficient of performance, or COP, of a heat pump, refrigerator, or air conditioning system. Higher efficiency, less energy (power) usage, and thus reduced operational costs are all related to higher COPs.

temperature of cold reservoir = -14.0°C

Tc = [ 273+ (-14.0)]K = 259K

temperature of hot reservoir = 20°C

Th = [ 273+ (20)]K = 293K

therefor, formula for coefficient of performance

Cop = Th/Th-Tc

Cop = 293/34

Cop = 8.61

to learn more about heat pump go to - brainly.com/question/3150928

#SPJ4

4 0
2 years ago
What is observed when an iron bar is
bija089 [108]
Answer:
b). of copper (II) sulfate

I hope this helped :)
5 0
3 years ago
Other questions:
  • What is the difference between an autosome and a sex chromosome
    12·1 answer
  • Why it is advisided to freshly prepare the ferrous sulphate solution for experiment
    8·1 answer
  • Luca wants to identify and quantity the chemicals causing air pollution in a city, but he is using a manual air sampler to colle
    15·1 answer
  • What is the ideal gas law?
    11·2 answers
  • Which region of the periodic table shown here contains elements that are easiest to oxidize?
    5·2 answers
  • Just need a letter so no that does not help
    13·1 answer
  • What’s that’s balanced out
    14·1 answer
  • Which particle makes the atom an unstable isotope?
    7·1 answer
  • Take off contact lenses first before using an eye wash station . True or False
    9·2 answers
  • Differences in ocean water density are larger at low latitudes near the equator because the water temperature changes often thro
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!