Chemistry

Please help with science chemistry question? REALLY EASY ! :(

Kay i have a test tomorrow and i need to know how to make formulas, but i dont remember the like prefexis or whatever that go at the beginning like for example: Iodine MONOchloride. The mono means ho

Chemistry - Stoichiometry - Titrations problem

can someone please help me on this problem? We did only one practice in class and the hw isnt similar to the only one we did and i cant solve it. Thank you soo much What volume of .115 M HCLO4 soluti

Energy in combustion reactions (no calculations)

i figured out the 3 combustion reactions: C4H10+13/2O2-->4CO2+5H2O C4H8+13/2O2-->4CO2+4H2O C4H6+13/2O2-->4CO2+3H2O I need to know by using reasoning which hydrocarbon would have the largest released

What is a species?? (chem)

Like in this question: List each species containing manganese in the experiment. Give the oxidation state of manganese and the colour of manganese in each case. Explain how you determined this.-Each

Kw problem please help

100 g of lithium hydroxide is dissolved in 750 ml of water. A) Write the disassociation equation B) Calculate both [H30+] and [OH-] Im confused with this question, please help me out Id be really h

A. how many grams of KOH should you add to 1L of water to make a 2 molarity solution

b. what is the pH of this solution?-a. 2 moles x 56.11 g/mole= 112.22 g KOH per liter b. [OH]- = 2 moles/LpH= 14 - (-log[OH-]pH=13.7-A. 2(molarity) = x(moles)/1(liters) multiply 1 on both sides to get

What container is used for Thermochemistry experiments and measurements

calorimeter

What is the molarity of an aqueous sodium chloride solution if .33 mol NaCl is dissolved in 2.5 L of water

Im not asking for you to do my homework, but I really just dont get this :/ Our teacher sucks, could you explain it a bit to help me get it?-Molarity has the units moles /L Since you are given moles

For the reaction NH4Br(s) -> NH3(g) + HBr(g), why is the change of "n" = 2

The equation used is: Kp = Kc(RT)^change of n-In these problems n refers to the moles of gases present. Since the reactant is a solid and both products are gases, change in n = 2 - 0 = 2-Because the

What did i do wrong in this Chemistry question

What is the theoretical yield of Sodium oxide if 5.00grams of sodium are reacted I got 10gNA2O and it was wrong, how should I have it setup?-4Na + O2--> 2Na2O ( Balanced reaction ) Mw(Na) = 22.98gram

Explain why it isn't possible for an atom to have a mass number of 10 and an atomic number of 12.

A question for my class, I totally forgot :(-Mass number = A = number of protons + number of neutrons Atomic number = Z = number of protons So with A = 10 and Z = 12, we would have 12 protons and min

Chemistry help please, teacher hasn't taught us this yet!

The rate of effusion of unknown gas X is found to be about 2.4 times that of SF6 gas (MW = 146 g/mol) at the same conditions of temperature and pressure. What is the molecular weight of gas X? Answer

Chemistry multiple choice questions

1. The density of copper is 8.92 g/mL. The mass of a piece of copper that has a volume of 9.5 mL is a) 2.58g b) 85g c) 0.94g d) 1.07g 2. The mass of a block is 9.43g and its density is 2.35 g/mL. The

Can 2 organic compounds have an identical formula but geometrically arranged differently

What are they called and please give some examples?-Yes, they are called isomers.Look it up for examples.

What is an indicator

In chemistry-An indicator is a compound which changes color depending on the pH of the solution of which it is a part. Roughly speaking, it indicates whether a liquid is acidic or basic.