1. The atomic mass is equivalent to 1/12 of the mass of a neutral atom of which element?
a. gold
b. hydrogen
c. carbon
d. oxygen
2. for an element, how does Avogadro’s number connect the atomic in the macroscopic scales?
a. it describes the number of moles in 1 grams of an element.
b. it describes the number of grams in 1 mole of an element.
c. it describes the number of atoms in 1 mole of an element.
d. it describes the number of atoms in 1 gram of an element.
3. The atomic mass of an element platinum (Pt) is 195.08 amu. How many atoms of platinum are in 195.08 grams?
a. 1.175 x 10^26 atoms
b. 6.022 x 10^23 atoms
c. 3.087 x 10^21 atoms
d. 1.951 x 10^25 atoms
4. The atomic mass of an element niobium (Nb) is 92.906 amu. which measurement is correct?
a. 1 mole of Nb= 92.906 atoms
b. 1 mole of Nb= 92.906 grams
c. 1 gram of Nb= 92.906 moles
d. 1 gram of Nb= 92.906 atoms
5. The atomic mass of copper (CU) is 63.546 amu, the atomic mass of sulfur (S) is 32.065, and the atomic mass of oxygen (O) is 15.999 amu. which molar mass is correct for copper sulfate (CuSO4)?
a. 446.440 g/mol
b. 225.802 g/mol
c. 111.610 g/ mol
d. 159.607 g/mol
1. The atomic mass unit is equivalent to 1/12 of the mass of a neutral atom of which element?
-carbon
2. For an element, how does Avogadro's number connect the atomic and macroscopic scales?
-It describes the number of atoms in 1 mole of an element.
3. The atomic mass of the element platinum (Pt) is 195.08 amu. How many atoms of platinum are in 195.08 grams?
-6.022×10236.022×1023 atoms
4. The atomic mass of the element niobium (Nb) is 92.906 amu. Which measurement is correct?
-1 mole of Nb = 92.906 grams
5. The atomic mass of copper (Cu) is 63.546 amu, the atomic mass of sulfur (S) is 32.065, and the atomic mass of -oxygen (O) is 15.999 amu. Which molar mass is correct for copper sulfate (CuSO4)?
159.607 g/mol
1) Carbon
2) It describes the number of atoms in 1 mole of an element.
3) 6.022×1023 atoms
4) 1 mole of Nb = 92.906 grams
5) 159.607 g/mol
Thanks heyo ❄
thank you heyo!!! <3
Thank you so much, "Heyo" you're 100% correct! Thank you!
Thank you heyo!! <33
Heyo!! <3
THANKS heyo AND Fever!
<33333!!!!
1. The atomic mass is equivalent to 1/12 of the mass of a neutral atom of which element?
To find the answer to this question, you need to know the periodic table and understand the concept of atomic mass.
a. gold
b. hydrogen
c. carbon
d. oxygen
The correct answer is c. carbon.
Explanation: The atomic mass of an element is a weighted average of the masses of all the naturally occurring isotopes of that element. Carbon has an atomic mass of approximately 12 atomic mass units (amu). So, 1/12 of the mass of a neutral carbon atom is equivalent to 1 amu.
2. For an element, how does Avogadro’s number connect the atomic in the macroscopic scales?
To answer this question, you need to understand the concept of Avogadro's number and its relationship to atoms and moles.
a. it describes the number of moles in 1 gram of an element.
b. it describes the number of grams in 1 mole of an element.
c. it describes the number of atoms in 1 mole of an element.
d. it describes the number of atoms in 1 gram of an element.
The correct answer is c. it describes the number of atoms in 1 mole of an element.
Explanation: Avogadro's number, which is approximately 6.022 x 10^23, represents the number of atoms, ions, or molecules in one mole of a substance. One mole of any element contains Avogadro's number of atoms of that element. This connects the atomic scale (individual atoms) to the macroscopic scale (moles).
3. The atomic mass of an element platinum (Pt) is 195.08 amu. How many atoms of platinum are in 195.08 grams?
To find the answer to this question, you need to use the concept of moles and Avogadro's number.
a. 1.175 x 10^26 atoms
b. 6.022 x 10^23 atoms
c. 3.087 x 10^21 atoms
d. 1.951 x 10^25 atoms
The correct answer is b. 6.022 x 10^23 atoms.
Explanation: To convert grams to atoms, you need to use the following steps:
1. Calculate the moles of platinum using the formula: Moles = Mass / Molar mass.
Moles = 195.08 g / 195.08 g/mol = 1 mole
2. Use Avogadro's number to convert moles to atoms.
1 mole * 6.022 x 10^23 atoms/mole = 6.022 x 10^23 atoms
Therefore, there are 6.022 x 10^23 atoms of platinum in 195.08 grams.
4. The atomic mass of an element niobium (Nb) is 92.906 amu. Which measurement is correct?
To answer this question, you need to understand the relationship between moles, grams, and atomic mass.
a. 1 mole of Nb = 92.906 atoms
b. 1 mole of Nb = 92.906 grams
c. 1 gram of Nb = 92.906 moles
d. 1 gram of Nb = 92.906 atoms
The correct answer is b. 1 mole of Nb = 92.906 grams.
Explanation: The atomic mass of an element, in this case niobium, is given in atomic mass units (amu). To convert between moles, grams, and atomic mass, you can use the following conversions:
1 mole of any element = atomic mass in grams
1 gram of any element = 1 mole of that element
So, 1 mole of niobium (Nb) is equal to its atomic mass, which is 92.906 grams.
5. The atomic mass of copper (Cu) is 63.546 amu, the atomic mass of sulfur (S) is 32.065, and the atomic mass of oxygen (O) is 15.999 amu. Which molar mass is correct for copper sulfate (CuSO4)?
To find the molar mass of copper sulfate (CuSO4), you need to add the atomic masses of each element in the compound.
a. 446.440 g/mol
b. 225.802 g/mol
c. 111.610 g/mol
d. 159.607 g/mol
The correct answer is d. 159.607 g/mol.
Explanation: To calculate the molar mass of copper sulfate (CuSO4), you need to add the atomic masses of copper (Cu), sulfur (S), and four oxygen (O) atoms.
Cu: 63.546 amu
S: 32.065 amu
O: 15.999 amu (4 oxygen atoms)
Adding these atomic masses together:
63.546 + 32.065 + (15.999 * 4) = 63.546 + 32.065 + 63.996 = 159.607 amu
Therefore, the molar mass of copper sulfate (CuSO4) is 159.607 g/mol.