Significant Figures
The number of significant figures in 0.00450.
What is 3?
35 minutes is equal to (blank) seconds
What is 2,100?
All isotopes of an element have the same
What is an atomic number?
The molar mass of water, H2O, is...
What is 18.02 g/mol?
These subatomic particles differ in number between isotopes of the same element.
What are neutrons?
The amount of significant figures in 0.208 is
What is 3?
Convert 5 kilometers to meters.
What are 5,000 meters?
All 3 isotopes of Hydrogen have how many protons?
What is 1?
If you have 0.5 moles of carbon dioxide (CO2), this is the number of molecules you possess.
What is 3.011×10^23 molecules?
1. A mixture in which the composition is uniform throughout.
2. A type of mixture where the components are visibly distinguishable.
3. The ability of a substance to dissolve in another substance, forming a solution.
1. What is a homogeneous mixture?
2. What is a heterogeneous mixture?
3. What is solubility?
In the number 1500, how many significant figures are present if no decimal is shown?
What is 2?
Convert 0.00350 grams to milligrams using correct significant figures.
What is 3.50 mg?
An isotope of Nobelium has an atomic mass of 254. How many neutrons does this isotope have?
What is 152?
The number of grams in 3.50 moles of sulfur dioxide (SO2), given its molar mass is 64.07 g/mol.
What is 224 g?
One mole of any substance contains this many representative particles.
What is 6.022×10^23?
The sum of 0.05678 g, 1.230 g, and 12.3 g, rounded to the correct number of significant figures.
What is 13.6 g?
A car is traveling at 65.0 miles per hour. Convert this speed to meters per second (1 mi=1.609 km,1 km=1000 m)
What is 29.1 m/s?
Which of the following is not an isotope of hydrogen? ( Tritium, Deuterium, Quatrium, Protium)
What is Quatrium?
The number of moles in 88.0 grams of carbon dioxide (CO2), given that the molar mass of CO2 is 44.0 g/mol.
What is 2.00 moles?
This formula relates the number of moles, mass, and molar mass of a substance:
What is moles=mass/molar mass?
A measurement of 5.320 x 10³ g is divided by 2.1 L. The final answer, with the correct number of significant figures, is:
Two or What is 2.5 × 10³ g/L?
A reaction takes 2.75 hours to complete. Convert this time to milliseconds (1 hour=3600 s 3600, 1 s=1000 ms).
What is 9.90×10^6 ms?
Carbon-14 is an isotope of carbon commonly used for this type of dating.
What is radiocarbon dating?
Chromium has four naturally occurring isotopes. 50Cr has a mass of 49.95amu and an abundance of 4.35%. 52Cr has a mass of 51.94amu and an abundance of 83.79%. 53Cr has a mass of 52.94amu and an abundance of 9.50%. 54Cr has a mass of 53.94amu and an abundance of 2.36%.
Using this information, estimate the atomic mass of chromium, in atomic mass units.
What is 51.996?
The conversion factor used to change miles per hour (mph) to kilometers per hour (km/h)
What is 1.609 km per mile?