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## What is Brooklyn college BA-Md program?

The BA-Md program at Brooklyn college is an eight year program that includes four undergraduate years at Brooklyn college and four more years at SUNY Downstate medical school. This program is amazing for saving future doctors a ton of money, since CUNY Brooklyn is a city college with a city tuition and SUNY Downstate is a state medical school with reduced tuition as well. The program also has a guaranteed admission to a great medical school, if all the requirements are fulfilled! What are the requirements for the program? In order to remain in the program, BA-MD students must maintain a cumulative overall GPA of 3.5, based on all courses, and a cumulative 3.5 science GPA. BA-MD students are

## How to convert grams to moles?

To convert grams to moles and vice versa, we must always use Molar Mass. Molar Mass can be calculated using the Periodic Table. To calculate the molar mass, we multiply each atom in the molecule by its atomic mass found in the Periodic Table and multiply by the number of atoms. For example, to calculate the molar mass of CO2 C= 1*12.011 = 12.011 O= 2*15.999 = 31.998 12.011 + 31.998 = 44.009 g/mol To convert grams to moles, we need to cancel the units of grams and get the units of moles. To convert moles to grams, we need to cancel the units of moles and get the units of grams. #chemistrytutor #generalchemistry

## Calculate Ka of a 0.10 M solution of lactic acid has a pH of 2.44

Lactic acid has one acidic hydrogen. A 0.1 M solution of lactic acid has a pH of 2.44. Calculate Ka for lactic acid? When we do acid/base questions, we always need to ask ourselves 2 questions. Question1 Do we have an acid or a base? In this case the question itself, told us that we are dealing with an acid. Question 2 Is this a weak or a strong acid? Strong acids are: HCl - hydrochloric acid HNO3 - nitric acid H2SO4 - sulfuric acid (HSO4- is a weak acid) HBr - hydrobromic acid HI - hydroiodic acid HClO4 - perchloric acid HClO3 - chloric acid Our acid does not belong to this list and is therefore a weak acid. For weak acids, we must always do ICE charts. Before the ice chart, we should write

## Will precipitation occur when the following solutions are mixed?

Will precipitation occur when the following solutions are mixed? If so, write a balanced chemical equation for the reaction. (a) Na2CO3 and AgNO3, (b) NaNO3 and NiSO4, (c) FeSO4 and Pb(NO3) 2 In order for precipitation occur, we must first write out the products of each reaction. These are double replacement reactions, where we can use the following formula: AB+CD --> AD + CB to predict the products. We also need to remember to write the correct product formulas by figuring out oxidation numbers for each element and polyatomic ion and cross multiplying them. Once products are written out, we need to figure out if they are soluble or insoluble using the solubility chart. If the product is ins

## Draw the structural formula for at least one bromoalkene with the molecular formula C5H9Br

Draw the structural formula for at least one bromoalkene with the molecular formula C5H9Br that shows: (a) Neither E,Z isomerism nor chirality. (b) E,Z isomerism but not chirality. (c) Chirality but not E,Z isomerism. (d) Both chirality and E,Z isomerism. In order to do this questions we must know two things. A molecule that does not have a chiral center will not be chiral. A chiral center is a carbon that is attached to four different groups. Therefore, if we need to draw a molecules with no chirality, we need to make sure there are no carbons with four different groups. In this case, we do this by putting bromine at the very end. The second concept we need to understand is that a molecule

## Which notations represent atoms that have the same number of protons but a different number of neutr

Which notations represent atoms that have the same number of protons but a different number of neutrons? (1) H-3 and He-3 (2) S-32 and S-32 (3) Cl-35 and Cl-37 (4) Ga-70 and Ge-73 Answer and Explanation: Choice 3 is the correct answer choice Atoms of the same element that have the same number of protons but a different number of neutrons are called isotopes. Whenever we see an element symbol followed by a dash and a number, that number represents the mass of the element. Choice 1 is incorrect since H and He are different elements and therefore have different numbers of protons. Choice 2 is incorrect since these are two identical atoms with the same number of protons and neutrons. Choice 4 is

## Which compounds contain chiral centers?

Which compounds contain chiral centers? (a) 2-Chloropentane (b) 3-Chloropentane (c) 3-Chloro-1-pentene (d) 1,2-Dichloropropane A chiral center is a carbon that is attached to 4 different groups. We should start by drawing out molecules, and adding the necessary number of hydrogens to each carbon. Remember a carbon wants to always have 4 bonds. Therefore, if we see a carbon with 2 bonds, we attach 2 more hydrogens and so forth. We can always eliminate carbons that have 2 or 3 hydrogens since they do not contain 4 different groups. In 2-chloropentane, carbon 2 is attached to chlorine, hydrogen, one carbon on the left and 3 carbons on the right. Therefore, carbon 2 is a chiral center. Choice A