May 30, 2019

What do I have to know about summer classes? It is important to note that summer classes for rigorous subjects such as chemistry, biology and physics are very intense. A student will learn in one and a half months, what others learn in half a year. The class usually meets every day and students learn a chapter every few days. For classes that include lab, such as chemistry, it is important to note that instead of having...

May 21, 2019

The placenta secretes progesterone and estrogen during pregnancy. Progesterone is responsible for the following functions:
• maintains the lining of the uterus
• inhibits (interferes with) contractions of the uterus

• inhibits the production and release of eggs

 Describe one likely result if the placenta became damaged and could not maintain progesterone levels. Support your answer. [1]

The text above s...

May 17, 2019

Nuclear chemistry is the last topic students learn in their chemistry classes. It is an important topic for the chemistry regent. The two sections in nuclear chemistry that have the most questions on the regent exam are balancing nuclear equations and doing half life problems. 

Half life is the amount of time it takes for the substance to become one half of its initial value. For example, if substance x has a half life o...

May 15, 2019

It is this time of the year again. Finals are upon us. Students are feeling overwhelmed and stressed. We have developed a guide for our students to use to feel less stressed during the finals and ace their tests.

Here we go:

1. Make a list of everything you need to cover broken down by subject.

For example: Chemistry 1. Do first practice final 2. Do second practice final  3. Redo old tests  4. Redo quizzes 5. Redo HW'...

May 13, 2019

All students in public schools in New York state are required to take Regents. Chemistry regent is a three hour test that consists of  85 questions, 50 of which are multiple choice and the rest are short responses. Chemistry regent covers the topics of: Atomic Concepts, Periodic Table, Moles/Stoichiometry, Chemical Bonding, Physical Behavior of Matter, Kinetics/Equilibrium, Organic Chemistry, Oxidation-Reduction, Acids,...

May 12, 2019

An organ, such as a kidney, used for transplant needs to be tested for compatibility with the person who is to receive the organ. If this is not done, the

(1) donated organ might attack the body
(2) donated organ might attack the immune system

(3) immune system might attack its own body cells

(4) immune system might attack the donated organ

Answer and explanation

Organ transplants are used widely for those people, whose org...

May 7, 2019

AP Chemistry is a college level chemistry exam covering a variety of chemistry topics.

Lets practice with some questions to get a taste of the exam.

1. In solid methane, the forces between neighboring molecules are best characterized as 

a. ionic

b. covalent

c. hydrogen bonds

d. ion-dipole forces

e. London dispersion forces

Methane, CH4 is a non polar molecule. The forces between neighboring molecules are called intermolecular...

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