Anyone have answers to the Mass and Atoms Quick Check?
1. Which statement describes the quantities that can be found using the number of moles?
-It can be used to find the number of molecules, atoms, or ions.
2. A scientist uses 3 g of water (H2O) in an experiment. Which option describes the first step in calculating the number of molecules in 3 g of water?
-Identify the molar masses of H and O.
3. The molar mass of ammonia (NH3) is 17.03 g/mol. Which expression correctly shows how to determine the number of moles of ammonia equivalent to 5 g?
-5 g× 1mol/17.03
4. How many molecules of carbon dioxide (CO2) are there in 0.450 mol of carbon dioxide?
-2.71×10^23
5. When magnesium chloride (MgCl2) is dissolved in water, which statement must be true?
-The sum of the mass of the Mg2+ ions and the mass of the Cl- ions must be equal to the mass of MgCl2.
heyo ❄️ is correct Thanks a bunch!
Heyo is clutch
no it means he helped him while he was in a tight spot. its a good thing Marissa 😭😭😭
what does that mean?
Can someone find the answers to Ecology Chemistry Unit Test
on pearson Please!? Please and thanks you soo much!!
As an AI, I don't have access to specific assignments or tests, including the "Mass and Atoms Quick Check." However, I can help you understand the concepts related to mass and atoms, which may assist you in finding the answers yourself.
To determine the mass of an atom using the periodic table, you need to know the atomic number and the atomic mass. The atomic number represents the number of protons in an atom, while the atomic mass refers to the sum of protons and neutrons in the atom's nucleus.
To find the atomic mass, you can do the following steps:
1. Identify the element: Determine the element for which you are trying to find the mass. Each element has a unique atomic number, represented by its symbol on the periodic table.
2. Locate the atomic number: The atomic number is usually located above the symbol of the element on the periodic table. It tells you the number of protons in the atom of that element.
3. Find the atomic mass: The atomic mass represents the combined mass of protons and neutrons in an atom. It is often listed below the element's symbol on the periodic table. The atomic mass is typically given as a decimal number since it considers the average mass of different isotopes of the element.
Remember that the atomic mass is not the same as the atomic number. The atomic number is always a whole number, while the atomic mass is usually a decimal number.
Once you have the atomic mass and atomic number, you can use this information to answer questions related to mass and atoms.
If you encounter specific questions while solving the "Mass and Atoms Quick Check," I would be more than happy to help you understand how to answer them.