Measurments
What tool would you use to measure the volume of a liquid in a chemistry lab?
A graduated cylinder
How many milliliters are in 1 liter?
1,000 mL
What are the three common states of matter?
Solid,Liquid,Gas
How many significant figures are in 0.00520?
3
When was the declaration of independence signed
1976
What SI unit is commonly used to measure length?
Meter (m).
Convert 3.5 meters to centimeters.
350 cm
Is CO₂ an element or a compound?
Compound.
Calculate 4.25 + 2.1 using the correct significant-figure rule.
6.4
Most popular MJ song
Billie Jean
Which device would be most appropriate for measuring the mass of a chemical sample?
weighing scale
Convert 450 mL to liters.
0.450 L
A sample contains only copper atoms. Is it a pure substance or a mixture?
Pure substance
Calculate 6.2 × 3.15 using the correct number of significant figures.
20.
How tall is the Burj Khalifa
828 meters
You need to measure the temperature of a solution during a reaction. What instrument should you use?
Thermometer.
How many moles are in 36.0 g of H₂O? The molar mass of H₂O is 18.0 g/mol.
2.00 mol H₂O
A container has water, dissolved salt, and several pieces of sand. Is the entire sample a pure substance or a mixture?
Mixture
A student measures the mass of a sample three times and gets 12.01 g, 12.02 g, and 12.01 g. The accepted value is 15.00 g. Are the measurements precise, accurate, or both?
Precise but not accurate.
which year was the year without a summer
1816
A student measures a liquid using a graduated cylinder. The bottom of the meniscus is between 24 mL and 25 mL, at approximately 24.6 mL. How should the measurement be recorded?
24.6 mL
How many grams of CO₂ are in 2.50 moles of CO₂? The molar mass of CO₂ is 44.01 g/mol.
110 g CO₂
A substance can be separated into two simpler substances only through a chemical reaction. Is it more likely an element, compound, or mixture?
Compound
A reaction has a theoretical yield of 12.5 g. A student obtains 10.2 g. What is the percent yield?
81.6%
How old is singapore
61 Years old