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
ANEK [815]
3 years ago
8

3. How many atoms are found in 0.000256 moles?

Chemistry
1 answer:
miskamm [114]3 years ago
8 0

Answer:

1.54×10^20 atoms

Explanation:

It's done by using the relation

N=n×L where,

N = number of entities present

n= amount of substance (mole)

L= Avogadro's constant which is 6.02×10^23

now from the question, given

n=0.000256

And L=6.02×10^23

N= 0.000256×6.02×10^23

N= 1.54×10^20 atoms

You might be interested in
HELP!!!<br> IF YOU DONT KNOW THE ANSWER THEN PLEASE DONT ANSWER!!
Simora [160]

Answer:

1. melting

2. freezing

5. condensation

6. evaporation

4 0
3 years ago
How did the ice ages affect where people settled in America
skelet666 [1.2K]
Because the cold could freeze them, and they could get hypothermia.
6 0
4 years ago
A sample of seawater contains 1.3g of calcium ions in 3,100kg of solution. what is the calcium ion concentration of this solutio
MakcuM [25]
Unit ppm stands for parts per million. in terms of mass, ppm is equivalent to mg/kg.
since 1 kg is 10⁻⁶ mg, 1 kg is equivalent to million mg.
therefore mg/kg is also ppm.
there are 1.3 g of Ca ions in 3100 kg
if 3100 kg contains - 1.3 g of Ca
then 1 kg contains - 1.3 g / 3100 kg
then Ca ions - 0.42 x 10⁻³ g/kg
Ca ion concentration - 0.42 mg/kg 
therefore Ca ion concentration is 0.42 ppm
8 0
4 years ago
Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mi
12345 [234]

Answer:

The increasing order of masses of molecule ions:

118 g/mol(75.8%) ,  120 g/mol(24.2%)

Explanation:

Chlorine occurs as 35-Cl (75.8%) and 37-Cl (24.2%).

Atomic mass of 35-Cl = 35 g/mol

Atomic mass of 37-Cl = 37 g/mol

Mass of Chlorocyclohexane in which 35-cl is present as a chlorine atom: C_6H_{11}Cl

=6\times 12 g/mol+11\times 1 g/mol+1\times 35 g/mol=118 g/mol

Mass of Chlorocyclohexane in which 37-Cl is present as a chlorine atom: C_6H_{11}Cl

=6\times 12 g/mol+11\times 1 g/mol+1\times 37 g/mol=120 g/mol

The increasing order of masses of molecule ions:

118 g/mol(75.8%) < 120 g/mol(24.2%)

5 0
3 years ago
Why the planets are arranged as they are in our solar system.​
Anastaziya [24]

Answer:

The order and arrangement of the planets and other bodies in our solar system is due to the way the solar system formed. Nearest the Sun, only rocky material could withstand the heat when the solar system was young. For this reason, the first four planets—Mercury, Venus, Earth and Mars—are terrestrial planets.

Explanation:

6 0
3 years ago
Other questions:
  • CH3CH2OH is an organic compound that is soluble in water. What type of compound is this?
    11·2 answers
  • If 19.2 liters of a gas are confined in a container at 269 kPa and 265 K. What is the volume of this gas at 310 K?
    8·1 answer
  • What are the uses of an enema? Select all that apply. what are the uses of an enema? select all that apply. ?
    12·1 answer
  • Which of these changes occurs during a nuclear change?
    12·1 answer
  • Based on your observations of the laboratory assignment(s) that produced gases, can you conclude
    14·1 answer
  • 1. If you need to name the alkane C7H16, which prefix and
    12·1 answer
  • Convert 65.4 m to mm.<br> Helppp please
    11·2 answers
  • Question 20 (2 points)
    9·1 answer
  • Do diastereomers have different physical properties
    13·1 answer
  • Why should you always condition a buret before running a titration?.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!