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15 chemistry questions?

15 chemistry questions?

Answer:

Felt Iron On Letters
Iron ons adhere to smooth surfaces more easilyYou can try, but they may not stay attached for longAlso they are stiff, so even if they stick, the blanket will be stiffer where the letters areThere is the other possibility of melting the blanket, depending on it's fiber contentDefinitely use a presscloth.
It cold easily scorch your blanketmany soft fabrics are synthetic nowadays, and are not designed to withstand the heat required for an iron-onYou'd be better off painting on the letters.
Compare the properties of a solid, a liquid, and a gassolid close molecules, liquid little bit farther and air very far apartthis can be very advance answerbut i dunno what grade r u in2Give me an example of a physical change and a chemical change physical ice cream melting , chemical paper burning 3Describe how an ionic compound formsHow does a covalent molecule form? ionic metal + nonmetal Covalent are when the electronegativity is not strong enough to steal the elcetron it just shares4What is the density of water? google this dun be lazy :p 5What is meant by the statement like dissolves like? polar will dissolve in polar solution and non polar will dissolve in non polar 6Name the following compounds: a) MgO b) NaCl c) K2CO3 magnesium oxide , sodium chlroide , potassium carbonate 7What is the formula for the following compounds: a) lithium bromide b) calcium oxide c) aluminum sulfide libr2, Ca2O, AlS3 8Is burning paper an endothermic or exothermic reaction? What about photosynthesis? exothermic 9Why is water used as a coolant in the radiator of your family car? coz it cheap and does not freeze easily 10What are the three units used to measure temperature? kelvin , celsius , farhenite 11How much heat is required to raise 100ml of water from 20 degrees Celsius to boiling? Give your answer in calories or JoulesQMCT Q100x20x4.18 12What are valence electrons? outer shell electrons 13How many valence electrons does oxygen have? Chlorine? Sodium? 14What is the octet rule? all elements want to have full vallance shell means 8 electrons each 15Draw the Lewis Dot Diagram of nitrogen molecule and answer the following questions about it: a) How many total electrons are there? b) how many shared electrons are there? How many unshared electrons are there? how can i draw here lol?

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