Recent content by Orion78

Can anyone be able to help me with this question? Thanks

I need to drag and drop all the labels into the relevant boxes by the bar chart. Three spaces will be left empty because there is anything to describe them. (See the attachment) I was thinking: title empty empty smalles difference between ... empty independent variable dependent variable...

An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference between the number of insect...

Potassium Dichromate is an oxidizing agent that is used to oxidize alcohols. In this case potassium Dichromate and hydrochloric acid oxidises the alcohol, which is the reactant of the reaction to produce the carboxylic acid, which is characterized by the functional group COOH. The product of my...

I need to find the product/s of a reaction, which has to be chosen from the list of compounds A - L. I thought the answer was only K but it seems to be wrong or that there is another product to add. (See the attachment). Thanks!

I need to complete the following sentence. If I think that electron capture or alpha decay does not occur in my decay process, I have to type a '0' (zero) in the appropriate box: Converting an atom of the isotope Uranium (238-92) into an atom of thorium can be accomplished if an electron...

I have calculated the wavelength of a line that would be observed in a spectrum from Andromeda where speed and λ0 were known, using the formula z =∆λ/λ0 and z=v/c. I obtained a value smaller than λ0 because Andromeda display a blue shift. After I calculated the same wavelength pretending that...

Thank you Borek for your corrections. But HOW, taking in consideration my two solutions, I can state which of the resulting solutions would have the higher pH? Can I might see it from their equations? What does it means that in weak acids the equilibrium lies well over to the left-hand side of...

Pollution from fireworks occurs in a number of ways, one of which is the release of gases such as carbon dioxide (CO2) and sulfur dioxide (SO2) into the environment. These gases react further in the atmosphere to produce carbonic acid (H2CO3), a weak acid, and sulfuric acid (H2SO4) a strong...

I have to write two balanced chemical equations for two reactions, including the state symbols. By knowing that Black Powder is a mixture of solid potassium nitrate (KNO3), sulfur (S) powder and carbon (C), in the form of charcoal, one possible reaction occurring during the combustion of...

By choosing among the following five options, what is the main source in the universe for the origin of the elements : silicon, lithium, bismuth, nickel and uranium? Primordial nucleosynthesis – fusion in core of low-mass stars – fusion in core of high-mass stars – slow neutron capture in...

Sorry, next time I will choose the right forum. The following is what I think is the right answer but I'd like to be confirmed. silicon = Fusion in core of low-mass star lithium = Primordial nucleosynthesis bismuth = Low neutron capture in high mass-stars nickel = Fusion in core of...

By choosing among the following five options, what is the main source in the universe for the origin of the elements : silicon, lithium, bismuth, nickel and uranium? Primordial nucleosynthesis – fusion in core of low-mass stars – fusion in core of high-mass stars – slow neutron capture in...

Thanks. yes, now I have all the info I needed.

Thanks caf123, that's was very helpful!