3 Histamine is a substance that is released by cells in response to injury, Infection stings, and materials that cause allerge responses, such as pollen. Histamine causes dilation of vessels and swelling due to accumulation of fluid in the tissues.People sometimes take anthistamine drugs to counter having a mass of 385 mg is composed of 208 mg of carbon, 31 mg of hydrogen and 146 mg of nitrogen. The molar mass of histamine is 111g/mol What is the molecular formula of histamine? Multiple Choice 1 point

To determine the molecular formula of histamine, we need to find the empirical formula first. Then, we can use the molar mass to determine the molecular formula.<br /><br />Step 1: Find the empirical formula<br />First, we need to convert the given masses of each element to moles. We can do this by dividing the mass of each element by its molar mass.<br /><br />Moles of carbon = 208 mg / (12.01 g/mol) = 17.32 moles<br />Moles of hydrogen = 31 mg / (1.008 g/mol) = 30.86 moles<br />Moles of nitrogen = 146 mg / (14.01 g/mol) = 10.42 moles<br /><br />Next, we need to find the simplest whole number ratio of moles of each element. To do this, we divide each mole value by the smallest mole value.<br /><br />Ratio of carbon = 17.32 / 10.42 = 1.66<br />Ratio of hydrogen = 30.86 / 10.42 = 2.96<br />Ratio of nitrogen = 10.42 / 10.42 = 1<br /><br />Since the ratios are not whole numbers, we need to multiply them by a common factor to get whole numbers. In this case, we can multiply all the ratios by 3 to get whole numbers.<br /><br />New ratio of carbon = 1.66 * 3 = 5<br />New ratio of hydrogen = 2.96 * 3 = 9<br />New ratio of nitrogen = 1 * 3 = 3<br /><br />Therefore, the empirical formula of histamine is C5H9N3.<br /><br />Step 2: Find the molecular formula<br />Now that we have the empirical formula, we can use the molar mass to determine the molecular formula. The molar mass of histamine is given as 111 g/mol.<br /><br />To find the molecular formula, we need to find the ratio of the molar mass of the empirical formula to the molar mass of histamine.<br /><br />Molar mass of empirical formula = (5 * 12.01) + (9 * 1.008) + (3 * 14.01) = 111.13 g/mol<br /><br />Ratio of molar mass = 111 g/mol / 111.13 g/mol = 1<br /><br />Since the ratio is 1, the molecular formula of histamine is the same as the empirical formula.<br /><br />Therefore, the molecular formula of histamine is C5H9N3.