Chemistry

Titration question- help please

A student performed an investigation to determine an accurate concentration of phosphoric acid (H3PO4) in rust remover. 10mL of the rust remover was diluted to 200mL in a volumetric flask. A 20mL aliq

Chemistry identify monoatomic gas?! help!

The pressure gauge on Tank #3 reads 2.50 atm. What is the identity of the monatomic gas in Tank #3?The temperature is 25C, and the Volume is 50L, and Tank 3 has 671 grams of unknown substance. This i

Chemistry Kinetics- homework help

Express the rate of the reaction in terms of the change in concentration of each of the reactants and products.2 D --> 3E + 5F a) when E is increasing at .025 M/s, how fast is F increasing? b) when D

In which of the following is the oxidation number of the IODINE the HIGHEST

a) potassium iodate b) sodium iodide c) iodine monofluoride d) diiodine heptoxide e) calcium hypoiodite-d. I2O7 in which I = +7

Chemistry whizzes come here

One of the reactions used to form sulfuric acid is the reaction of oxygen with sulfur dioxide under equilibrium conditions to form sulfur trioxide. Before the reaction, the concentration of sulfur dio

A hydrocarbon is found to contain 87.17% Carbon and 12.83% Hydrogen by mass...

A hydrocarbon (alkane or cycloalkane) is found by combustion analysis to contain 87.17% Carbon and 12.83% Hydrogen by mass. Determine the smallest possible molecular formula.-Take a hypothetical 100 g

Is Potassium Hydroxide homogenous or heterogenous

I know that potassium hydroxide is a colourless solution but i am not sure if it is homogenous and i dont know if it is a pure substance?-Solid potassium hydroxide, KOH, is a pure substance, a compoun

How can i find the the masses of two isotopes given thier abundance and the atomic mass

isotope 1 has 37.40 abundance and isotope 2 has 62.60 abundance the sum of the masses is 371.9087 how can i calculate the masses of both isotopes given this info i set my problem up like this 371.9

Please can someone help me with this chemistry homework? :)

here is the question: the melting point of soda-lime glass is about 750 degrees Celsius. the raw materials for making soda are limestone and common salt (sodium chloride). there are almost unlimited

Stoicheometry Problem!! HELP

I tried answering the following Qs, but I keep getting the wrong answer: Na2CO3 + 2HCl -> 2NaCl + H2O + CO2 a) A chemist dissolves an impure sample of Na2CO3, with a mass of 0.250 g, in water. The c

Chemistry question help

I need help with this chemical reaction question. I got the first part of it right, but Im completely lost on the other few part: In a chemical reaction 2 mol of substance A react to produce exactly

Can you complete this chemistry phrase

Sodium chloride (table salt) is a{blank} of sodium, which is a soft{blank} and chlorine which is a pale yellow[blank] Please help?-Compound Metal Gas.

What are the methods of mining and purifying lithium

Lithium is mostly found in the Salar de Altacama in Chile. One uses water to dissolve the salt. One carries the salt solution to a source of electricity. One fractionates the salt solution to separate

Chemistry problem multiple choice

The rate constant k of a chemical reaction depends on __________________. a. reactant concentration b. reactant coefficients c. temperature of the reaction. d. All of the above e. None of the a

Please help on this organic chemistry reaction....

toulene+excess Cl2 gives ortho-chlorotoulene+para-chlorotoulene. In this reaction why meta-chlorotoulene is not formed?-Toluene has a CH3 group attached to the benzene ring. CH3 group (having +R and +