Franky

A spring with a force constant of 4.5×104 N/m is initially at its equilibrium length. How much work must you do to stretch the spring 0.070 m? How much work must you do to compress it 0.070 m?

I am having so much trouble calculating Type 2 error in simple questions, can someone pleaseeeee help me by explaining what to do? Let ƒÊ denote the true average diameter for bearings of a certain type. A test of Ho: ƒÊ = 0.5 versus Ha: ƒÊ ‚ 0.5 will be...

Hi, the question is: in each reaction, identify what have been oxidised and reduced. The equation is: 2Al + 3H2SO4 ---> Al2(SO4)3 + 3H2 I am confused about the Al2(SO4)3 I know what oxides and reductions us I just don't understant how Al2(SO4)3 balances o...

I am really stuck, I have tried to look these up everywhere and I keep getting different answers. I have to find the balanced equations for: Magnesium + Citric acid Zinc + citric acid Copper + Citric acid Manganese + Citric acid If I can have some help it...

Can you check if this is correct please: Reactivity order for these metals (top being most reactive): - Magnesium (I'm not sure if Magnesium or Manganese should be at the top) - Manganese - Zinc - Copper Reactivity order for these acids (top being most re...

Can you check if this is correct please? a) How many moles of sodium hydroxide are there in 19.00 cm3 of 0.100 mol dm3? My answer: 0.0019 mol b) How many moles of hydrochloric acid are, there in 25.00 cm3 of the acid solution? My answer: 0.0019 mol c) How...

2 quick questions: I am stuck on this: 1) The concentration of hydrogen ions in a 0.1 mol dm3 solution of phosphoric acid, H3PO4? I would be able to do it if I knew the correct equation that = H3PO4 but I can't work it out. 2) In titrations why would more...

a .300 kg piece of metal is heated to 88 degrees celsius and placed in a copper calorimeter with a mass .150 kg which contains .500kg which contains .500 L of water that are both initially at 12.6 degrees celcius. Over short period of time the mixture com...

Divide. Use estimation to check. 585 divided by 3 solve

Find the circumference of each circle. Use 3.14 for the value of n. Round your Answere to the nearest tenth Area is 201cmsquared

Thank you very much :)

Ok, is citric acid not C6H8O7 ? That's what my teacher has said. Would it be: 2C6H8O7 + 3Mg --->(C6H5O7)2Mg3 + 3H2

Ahh ok, thank you very much :)

Ahh ok, sorry I had been looking a lot, I just didn't see it so I thought I'd post it again. Thank you!

Thank you. I know, the question was very long so I tried to shorten it for this but left out some details sorry!

She lost her way