How many moles is 1.81 x 10^24 atoms of carbon?
Answers
So if you have 1.81 x 10^24 atoms,
you divide that by 6.02 x 10^24 moles to get 3 moles
Using factor/label method:
1.81 x 10^24 atoms * 1 mol
------------------------ = 3 moles
6.23 x 10^23 atoms
(As you can see, the unit "atoms" cancels out from the top and bottom.)
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Calcium chloride contains only calcium and chloride. What is the formula for this compound
Determine the new pressure of o2(g) in the cylinder in atmospheres
Answers
collect more data to support their hypothesis
The Scientific Method is made up of steps scientists take to draw a conclusion
Step 1: Form a Question
Step 2: Research the Question
Step 3: Form a Hypothesis (educated guess)
Step 4: Conduct an Experiment (use quantitative and qualitative data)
Step 5: Form Your Conclusion Based on Results
This should help....
Warm water is less dense than cold water.
The density is the same for warm and cold water.
The density will sometimes be higher for warm water and other times higher for cold water.
Answers
It is due to the the effect of heat on water molecules that's why warm water tend to rise above cold ones. The molecules of the water are excited by the energy. They begin moving faster, so when they bump into one another, they bounce further away. The increase space between the fast-moving molecules decreases the density.
Boring
Balkite
Beryllium
20.Zinc (Zn) has an atomic number of 30 and an atomic mass of 65. How many neutrons does a stable atom of Zn have?
30
35
60
95
Answers
Number 2 is ..35
Answers
The concentration of the solution has been 0.17 M.
The molarity has been defined as the moles of solute that has been dissolved in a liter of solution. The molarity of the solution has been expressed as:
Computation for Molarity of the solution
The molar mass of sodium chloride solution has been 58.5 g/mol.
The given mass of NaCl in the solution has been 0.5 grams.
The volume of NaCl solution has been 0.05 L.
Substituting the values for molarity of the solution:
The concentration of the solution has been 0.17 M. The solution has been prepared by dissolving 0.5 g NaCl in minimal water, and makeup the volume to 0.05 L.
Learn more about molarity, here:
I hope this helps. Let me know in the comments if anything was unclear or if you were asking a different question.
b. solution
c. solute
d. colloid
Answers
This depends on the type of homogeneous mixture at hand. For a liquid-solid homogeneous mixture, the liquid works as the solvent. For a gas-liquid homogeneous mixture, the liquid often works as the solvent as well. However, for a liquid-liquid homogeneous mixture, the liquid acts as both the solute and solvent.
225
92 U
233
143U
OU
Answers
Answer:
²³⁵₉₂U
Explanation:
The right symbol for the nuclei is ²³⁵₉₂U;
For this chemical element, the atom is represented by the symbol U;
To the superscript before the symbol is the mass number
The subscript before the symbol is the atomic number
Mass number is the number of protons and neutrons
Atomic number is the number of protons.