Answer:
Explanation: tellurium has an atomic mass of 127.6 whilst the element that comes after it, iodine, is lighter with an atomic weight of 126.9. Mendeleev concluded that the atomic mass for one of these two elements must be wrong because tellurium clearly preceded iodine in the periodic table
Answer:
173.5 g
Explanation:
This question seems incomplete, as the power by which 10 is increased is missing. I will answer this question assuming the given number of molecules is <em>7.03x10²³ </em>molecules. A different number of molecules will give a different answer, but the procedure remains the same.
First we <u>convert the given number of molecules into moles</u>, using <em>Avogadro's number</em>:
- 7.03x10²³ molecules ÷ 6.023x10²³ molecules/mol = 1.17 mol
Then we <u>convert magnesium nitrate moles into grams</u>, using its <em>molar mass</em>:
- 1.17 mol * 148.3 g/mol = 173.5 g
Answer:
C
Explanation:
the sum of calories is 100. When 50 calories are lost, 50 calories is the remainder.
Answer:
Y because organism y feed on herbivores
Explanation:it means y is carnivores or omnivores
Explanation: