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Which statement best describes Calcium

A. Tend to lose electrons B. Form cations C. Become positively charged D. Contains more protons than electrons when in ionic compounds E. All of those are correct-E. All of those are correct

Hi, I am just a little bit stuck on a question. Chemistry

Hi i am doing chemistry 12 equilibrium but i got stuck on a question while studying i am trying to do it but nothing comes to mind so it says consider the system 2hbr h2 + br2 initially .25 mol o

PLEASE HELP!!!!!!!! YOU WILL GET A LOT OF POINTS! ALCOHOL SCIENCE QUESTION!

Some thermometers contain alcohol. Alcohol is used in thermometers because it A-is a clear gas when it evaporatesB-has a high densityC-is soluble in waterD-expands and contracts easily-Wow, you sure h

Titrations - Weak acid with strong base

A 35.0 mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150 M NaOH solution. Calculate the pH after 50.0 mL of NaOH have been added. In the original question, I answered what the pH woul

Do dimethyl ether and ethanol have the same properties

No. Different boiling points, different polarities.

Why do tires, balls, balloons get bigger when we put gas into them

Gas Laws-Molecules move faster when they have more energy (which can be supplied as heat). This causes two things: The molecules want to move farther apart (expand its volume) and the molecules collid

Chemistry enthalpy and temperature!!!!!!!!!!!!!!!!!!!!!!… help!!!!!!!!

Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) ----> BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 107.6 mL of 0.500 M HCl is mixed with 300.0 mL of 0.565 M Ba(OH)2. Assuming th

Got a question about nuclear reactors and bombs

doing an argumentative essay about nuclear reactors vs. thorium reactors and why thorium reactors are better/safer. my question is if both a reactor and a bomb use uranium 235, but at different conce

What does q 2H mean in NMR

This is referring to interpretations of NMR spectra results and is like this 2.30 q 2H. And sometimes it is numbers followed by s or t instead of q. What do all these mean, because I am only familiar

What is the name of the acid H2Sc

Hi, what is the name of the acid H2Sc, and dont tell me there isnt one, there is! Thanks in advance:D How do you get H2S to be hydrosulfuric acid?-The name of the acid H2Sc is Hydro sulfuric acid. Ac

What is i^67 - i^90??

-i + 1-1 - i

True and false about elementary reactions

Seems simple enough, but I cant seem to get them all right. Please help if you can! The reaction of NO with Cl2 is: 2NO + Cl2 → 2NOCl The following criteria are given: 1. A unimolecular decomposit

Please help with this radioactive question!

Cobalt 60 which undergoes beta decay has a half life of 5.26 years How many beta particles are emitted in 600s by a 3.75 mg sample of cobalt 60?-find K for the reaction 1/2 life = 0.693 / k 0.693 / 5.

What quality of the element (hydrogen) makes it useful for this purpose

What quality of hydrogen makes it useful for this purpose? Hydrogen can also replace natural gas for heating and cooling homes and waters used at home. (remember its for HYDROGEN...) SCIENCE PLEAS

Chemistry Help Please!

A reaction is followed and found to have a rate constant of 3.36 × 104 M-1s-1 at 344 K and a rate constant of 7.69 M-1s-1 at 219 K. Determine the activation energy for this reaction. a. 12.5 kJ/mol
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