Chemistry
How many moles of gold atoms do 3.45 x 10^24 gold atoms constitute. This is what I did 3.45 x 10^24 x 1 / 6.022 x 10^23 = 573 am I right
Chemistry
Ok what I did wrong was say 48 O atoms instead of just 3. Thank you very much
Chemistry
Very confused! Converting between grams of a compound and grams of a constituent element Determine the mass of oxygen in a 5.8 g of NaHCO3 5.8 g NaCHO3 * 1 mol NaCHO3/ 84.01 NaCHO3 * 48.00 mol O / 1 mol NaCHO3 * 16.00 g O/ 1 mol = I got 53 but the answer is 3.3 g O Help what a...
Chemistry
When I worked the question I got cu = 0.0196 and o= 0.0196 so the empirical formula is CUO
Chemistry
A 1.250 g sample of copper wire was heated in air and reacted with oxygen to give 1.565 g of copper oxide product. Calculate the empirical formula of the copper oxide. Please help I'm lost. I need step by step Please and thank you
Geometry
A 30-foot cable is suspended between the tops of two 20-foot poles on level ground. The lowest point of the cable is 5 feet above the ground. What is the distance between the two poles?
Math
Sorry if you spend $4 every 7 mins, in 9 days you'll spend how much
Math
A car covers 2924 km in 43 hrs. What is it's speed
Chemistry
Write the Lewis structure for each ion Al3+ Mg3+ Se2- N3- My question is why does Se2- get a bracket and 8 dots. And the same for N3-. I hope I'm making sense.
Math
Chris works an electrician with the Central Electric Company. He earns $16.25 per hour with time and a half after 40 hours. If he works 43 hours Monday through Friday, how much will he earn?
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