Answer:
half-life of 5,700 ± 40 years
Explanation:
The correct answer is - Jerusalem
Answer:
Climate change that is caused by humans
Answer;
D. C6H6, C2H5OH, C6H5CH3, and C3H5(NO3)3.
Explanation;
-Organic compound are chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen, like the examples above in choice D. . Inorganic Compounds
on the other hand, are compounds made from any elements except those compounds of carbon, such as CaSO4, CaCl2 and Ca3(PO4)2 in A, B and C respectively.
Answer:
Molecular formula = N2O4
Explanation:
The empirical formula of a compound is NO2. Its molecular mass is 92g/mol. What is its molecular formula?
Step 1: Data given
The empirical formula = NO2
The molecular formula = NO2
Molar mass N = 14 g/mol
Molar mass O = 16 g/mol
Step 2: Calculate molecular mass of the empirical formula
Molar mass NO2 = molar mass N + Molar mass of 2*O
Molar mass NO2 = 14 + 2*16
Molar mass = 46 g/mol
Step 3: Calculate the molecular formula
We have to multiply the empirical formula by n
n = molecular mass / molecular mass of the empirical formula
n = 92 g/mol / 46 g/mol
n = 2
We have to multiply the empirical formula by 2
Molecular formula = 2*(NO2)
Molecular formula = N2O4