Answer:
Explanation:
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In this case, since the mass percentages in a compound which is wanted to know the molecular formula, can be assumed to be the masses, we first need to compute the moles they have in the formula unit:
Next, we divide each moles by the fewest ones (3.73 mol) in order to find the subscript in the empirical formula first:
Then, the empirical formula is BH2N whose molar mass is 26.83 g/mol, so the ratio of molecular to empirical is 80.50/26.83=3; therefore, the molecular formula is three times the empirical one:
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Answer:
A)less
Explanation:
This is because obviously if it's less metallic then it won't have similar traits to metals as well, there's less metal.
Answer:
35.3 g
Explanation:
Step 1: Given data
Number of atoms of aluminum: 7.90 × 10²³ atoms
Step 2: Calculate the number of moles corresponding to 7.90 × 10²³ atoms of aluminum
We will use Avogadro's number: there are 6.02 × 10²³ atoms of aluminum in 1 mole of atoms of aluminum.
7.90 × 10²³ atoms × (1 mol/6.02 × 10²³ atoms) = 1.31 mol
Step 3: Calculate the mass corresponding to 1.31 moles of aluminum
The molar mass of Al is 26.98 g/mol.
1.31 mol × 26.98 g/mol = 35.3 g
Answer:Which of the following statements about the periodic table is true?
Elements in the same column are similar in their properties.
Elements in the same row are similar in their properties.
Elements that start with the same letter are similar in their properties.
Elements that have the same atomic mass are similar in their properties.
Explanation:Which of the following statements about the periodic table is true?
Elements in the same column are similar in their properties.
Elements in the same row are similar in their properties.
Elements that start with the same letter are similar in their properties.
Elements that have the same atomic mass are similar in their properties.
