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
Anon25 [30]
3 years ago
12

4.81*10^24 atoms of lithium

Chemistry
1 answer:
enyata [817]3 years ago
4 0

Answer:

Mass = 55.52 g

Explanation:

Given data:

Number of atoms of Li = 4.81×10²⁴ atom

Number of grams = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For Li:

4.81×10²⁴ atom × 1 mol / 6.022 × 10²³ atom

8 moles

Mass in gram:

Mass = number of moles × molar mass

Mass = 8 mol × 6.94 g/mol

Mass = 55.52 g

You might be interested in
The temperature of a sample of water increases from 20.3°C to 45.7°C as it absorbs 5609 J of heat. What is the mass of the sampl
ycow [4]

This should help :)

Example 1: A 36.0 g sample of water is initially at 10.0 °C. How much energy is required to turn it into steam at 200.0 °C? (This example starts with a temperature change, then a phase change followed by another temperature change.)

Solution:

<span>q = (36.0 g) (90.0 °C) (4.184 J g¯1 °C¯1) = 13,556 J = 13.556 kJ q = (40.7 kJ/mol) (36.0 g / 18.0 g/mol) = 81.4 kJ q = (36.0 g) (100.0 °C) (2.02 J g¯1 °C¯1) = 7272 J = 7.272 kJ q = 102 kJ (rounded to the appropriate number of significant figures) </span>
8 0
3 years ago
For each equation given below, enter the number in the space provided to correctly answer the question.
victus00 [196]

Answer:

I don't know honey

Explanation:

hope you keep trying

4 0
3 years ago
Which property of potential energy distinguishes it from kinetic energy?
vazorg [7]

Answer: <u><em>Shape and position</em></u>

Explanation:

<u><em>I just took the test and I got it correct</em></u>

3 0
3 years ago
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s) H 2O (l) Ca(OH) 2 (s) In a parti
Nimfa-mama [501]
Find the moles of CaO

divide mass (2.0g) by the RFM which is 56 (Ca is 40 add that to O which is 16 making 56) this gives 0.0356 moles.

Find the theoretical mass by multiplying the moles of CaO (which is 0.0356 as there are no balancing number making the ratio 1:1) by the RFM of Ca(OH)2 which is 74 (40+16+16+1+1)

74 (Ca(OH)2 RFM) x 0.0357 (CaO moles) = 2.6g which is the theoretical mass of Ca(OH)2

Find percentage yield by dividing the actual mass of Ca(OH)2 by the theoretical and then x100 this Should give you 82.3%
8 0
3 years ago
What prefixes is best for measuring large quantities like the mass of a person?
Alecsey [184]
The answer is Deca foo.
7 0
3 years ago
Other questions:
  • Be sure to answer all parts.
    5·2 answers
  • BRAINLIESTTT ASAP!! PLEASE HELP ME :)
    14·2 answers
  • An aqueous solution of sodium chloride is best classified as a
    15·1 answer
  • A rechargeable battery initially stores 3.6 kJ of chemical energy. Anna puts the battery in a flashlight, where 2.1 kJ of energy
    8·1 answer
  • An experimental set up involves a cell with pumps that maintain high K+ and Cl- concentrations outside of the cell, and high Na+
    5·1 answer
  • How many moles of Li3N will be created using 0.24 moles of Li in the given reaction? 6Li + N2 2Li3N 0.04 moles 0.08 moles 0.12 m
    10·1 answer
  • PLs help mweee Ill mark brainliest
    10·1 answer
  • How many grams of calcium are made up by 2.68 x 1023 atoms?
    5·1 answer
  • A sample of chlorine gas is stored at a temperature of -25oC. If the chlorine gas's temperature is raised to 52oC, its volume in
    6·1 answer
  • Can someone please answer this question for me.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!