Moira

I need to answer a few questions fo my chemistry homework- 1.Why does the mass of copper sulphate decrease as a result of being heated?

2a) Someone finds teo bottles without labels. Both are white solids. One of the white solids turns directly from a solid to a gas on heating. What is this type of change called? b) The other solid turns yellow on heating. On cooling it turns white again....

3. Copper carbonate turns black when it is heated and the mass decreases. What is the normal colour of copper carbonate?

4. Lead dioxide gives off a gas when heated. The gas relights a glowing splint. Give the name of this gas. 5. Hydrated cobalt chloride are dark red crystals. Give twoobservations you would make (what you would see) when these crystals are heated.

for question 2c earlier - Would you describe the effect of heat on the white powders as a physical change or a chemical change? give one reason for your answer. - My sister told me the answer would be for whichever one is more difficult to reverse but I d...

i have a history essay that needs to be done by wednesday next week. its wednesday today the week before so it would really help if someone could do it for me! the title it as follows: "The main reason for heavy casualties on the western front is because...

Help I need a mnemonic to remeber the following words Family Peers Role Model Fashion Media Cost Status Disability Age Race Gender Availability Location Access Time Illness Health Problems

According to the SMCR model, problems in communication can arise when the speaker fails to do what? A. Have a neat appearance B. Speak on the level of the receiver C. Have outside interests D. Maintain eye contact with the receiver I think the answer is B...

I want to enlarge a 8 and 1/2 inch by 11 inch drawing to about 12 by 16 inches on the copy machine. What per centage of enlargement should I set the copy machine? Thanks

6 The first flowerbed that Marita made used 1 1/2 bags of barkdust. The flowerbed she is now making is times 2 1/5 as large as the first. How much barkdust will be used for this flowerbed?

Raleigh has a mass of 60.0 kg and is standing on a scale in an elevator. The scale reads 750 N. What is the acceleration of the elevator?

To write a paragraph in detail is pretty easy. Just add description words and adjectives. It's better not to over do it and add five adjective per sentence- there should be a maximum of maybe two/three decribing things in a sentence. Try to vary the lengt...

T(n)= 0.5n^2+1n-0.5n This ones quite easy. btw if youre good at chemistry please answer my question!

Well I know the first two answers. 2a) was sublimination- turning directly from a solid to a gas and I worked out that 2b) was zinc oxide- it turned yellow on heating and white on cooling.

This is a homework help site. You cannot rely on others to do the homework for you. If you're that desperate perhaps you should ask the teacher for help.

it would actually be 2x+1 not 2x-1 because +3-2 is equal to +1. and yes you can combine them together.

Thank you that's great just what we needed

Yes Anonymous is correct.