Recent content by kshah93

Thanks. That made things clearer.

I totally agree with you but my question is how do you know that the 30 people that both saw the ad on TV and in the paper include the 50 people that saw it on TV and the 60 people that saw it in the paper. How do you know that the 60 people is not the blue shaded region only, the 30 the green...

But how do you know that those people are not different? Say the 60 people vs the 50 people vs the 30 people? Are you supposed to assume that the 30 that heard from both sources includes people from the 60 people who heard from the newspaper and the 50 people that heard from the TV? The question...

Yeah, I know that but why? I mean it gives you the total number of customers (200) and it tells you 60 out of those 200 learned from the newspaper, 30 out of 200 learned from both sources and 50 out of 200 learned from TV. So wouldn't you just add all the individual probabilities and divide that...

Homework Statement A computer store advertised its annual half-price sale in the newspaper and on TV. A survey of 200 customers indicated that 60 learned about the sale from the newspaper, 50 from TV, and 30 from both sources. What is the probability of the following events? b) A randomly...

If the proton in the nucleus of, say a hydrogen atom, exerts an attractive force on an electron that is in orbit, why doesn't the electron move towards the proton? And does this have anything to do with the electric force being the centripetal force?

How would you use the oxidation numbers to determine what is being oxidized and reduced? Is it to do with the change, so if the oxidation number increases you have an oxidation and if it decreases you have a reduction? I haven't really learned the oxidation method for balancing redox equations...

Yeah, but the question asks me to use half reactions to balance the redox equation, not oxidation numbers. Is there a way to do this using half reactions?

Homework Statement Use half reactions to balance the following redox reactions and underline the oxidizing agent m) Zn + HNO[SIZE="1"]3 --------> Zn(NO[SIZE="1"]3)[SIZE="1"]2 + NH[SIZE="1"]4NO[SIZE="1"]3 + H[SIZE="1"]2OHomework Equations Not applicableThe Attempt at a Solution I would usually...

Yeah, but the answer key doesn't have an HClO in it at all.

Okay, thanks for responding. I have one question. For your first half reaction, why is there an HClO?

Homework Statement Use half reactions to balance the following redox reactions and underline the oxidizing agent. a) Cl2 + ClO3{-} -> ClO{-} (acidic) {} is the charge e{-} is electrons Homework Equations Not applicable The Attempt at a Solution Well I tried to separate and...