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
schepotkina [342]
3 years ago
12

You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the smallest number of moles? You have 10.0 g each of Na, C, Pb, Cu

and Ne. Which contains the smallest number of moles?
1. Pb
2. Cu
3. Ne
4. Na
Chemistry
2 answers:
sergejj [24]3 years ago
7 0

Answer:

The answer to your question is number 1. Pb

Explanation:

Data

10 grams of Na, C, Pb, and Ne

Process

Calculate the moles of each element

                        23 g of Na ----------------- 1 mol

                        10 g of Na ------------------- x

                               x = 0.43 moles of Na

                        20 g of Ne ---------------- 1 mol

                        10 g of Ne ----------------- x

                               x = 0.5 moles of Ne

                         64 g of Cu -------------- 1 mol

                          10 g of Cu -------------- x

                              x = 0.16 moles of Cu

                         207 g of Pb ------------- 1 mol

                            10 g of Pb -------------- x

                               x = 0.048 moles of Pb

Pb has the smallest number of moles

ivanzaharov [21]3 years ago
5 0

Answer:

Pb contains the smallest no of moles

Mole = mass/atomic mass

For lead no of mole = 10g/207.2g/mol

= 0.04826mol

For Cu no of mole = 10g/63.546g/mol = 0.1574mol

For Ne no of mole = 10g/20.1797g/mol = 0.4955mol

For Na no of mole = 10g/22.9898g/mol = 0.5350mol

You might be interested in
C3H8 and CH4 are 2 compounds made from the same elements. This is an example of which law? A) Law of Conservation of Mass b) Law
Sphinxa [80]

C3H8 and CH4 are two compounds made from the same two elements, C and H. The ratios of C and H for both are round numbers.

Law of multiple proportions states that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

So the ans is C) Law of Multiple Proportions

6 0
3 years ago
013 10.0 points
34kurt

Answer:

this isn't immediately clear, it can be seen in ... CO2? 1. 6.0 × 10−23 g. 2. 44 g. 3. 7.31 × 10−23 g correct. 4. 6.0 × 10. 23 g. 5. 7.31 × 10 ... 40.0 grams of S will react leaving 10.0 grams. S unreacted. 013. 10.0 points ... FeCl2 and K2CO3 is ... 9. 1. There is no reaction. 2. KCl electrolyte. 3. CO2 gas. 4. FeCO3 precipitate. correct.

Explanation:

5 0
3 years ago
HHHEEEEEEELLLLPPPP PPPPPLLLLEEEASSSEEEE I GIVE ~BRAINLIEST~!!!!!! PLZ HELP ME
AnnyKZ [126]
The action or power of focusing one's attention or mental effort.

a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.


a substance that slows down or prevents a particular chemical reaction or other process, or that reduces the activity of a particular reactant, catalyst, or enzyme.
5 0
3 years ago
Read 2 more answers
if you react 100g of ammonium chloride with excess calcium oxide, what Is the theoretical yeild (in grams) of ammonia? when you
Maurinko [17]

Answer:

31.78 grams

25.55%

Explanation:

The balanced reaction for ammonium chloride with calcium oxide will be:

2NH4Cl + Ca(OH)2 ---> CaCl2 + 2NH3 + 2H2O

The molecular weight for ammonium chloride(NH4Cl ) is 53.49g/mol, while the molecular weight for ammonium(NH3) is 17g/mol. The number of theoretical yield of ammonia from 100g of ammonium chloride will be:

100g / (53.49g/mol) * 2/2  * 17g/mol= 31.78 grams

If the actual yield is 8.12g, the percent yield will be: 8.12g/31.78g * 100% =25.55%

4 0
3 years ago
Of the molecules below, the bond in __________ is the most polar. hbr hi hcl hf
Black_prince [1.1K]
<span>There's a trend in electronegativity. The bottom left of periodic table is the lowest (0.7) and the upper right is the highest (4.0). The most polar is the greatest difference in electronegavity. hbr- 1~ , hi- 0.5~ ,hcl - 1.3~ , hf-1.8 so,hf is the answer</span>
7 0
3 years ago
Other questions:
  • Anne brought a 1 L bottle of vinegar from home to use in an experiment on volcanoes in science class. she poured the contents of
    5·1 answer
  • What is a hygrometer?
    11·1 answer
  • An atom is neutral because it has the same number of positively charged protons as<br> it has
    11·1 answer
  • Given the atomic weights of carbon, 12.01; hydrogen, 1.01; and oxygen, 16.0, what is the molar mass of glucose?
    7·2 answers
  • 30 POINTS!!!! WERE HELP ASAP! Mutualism, commensalism, and parasitism are all examples of what type of relationship between orga
    6·2 answers
  • The second-order rate constant for the dimerization of a protein (P) P + P → P2 is 6.2 × 10−3/M · s at 25°C. Part 1 out of 2 If
    6·1 answer
  • according to newtons second law of motion, if a force remains the same but mass increases, then acceleration will...
    8·1 answer
  • HELP ME!!!!
    7·1 answer
  • Charcoal samples from Stonehenge in England emit 45.1% of the disintegrations per gram of carbon per minute expected for living
    8·1 answer
  • Why does sound travel at different speeds through various materials?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!