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HESI A2 Chemistry Q & A

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HESI A2 Chemistry Which of the following is true? water is not a good conductor what makes up an atomic number? amount of protons=amount of electrons which makes it neutral van der Waals forces the two weakest intermolecular attractions- dispersion interactions and dipole forces Which intermolecular force is the strongest? hydrogen bonding Your recent answers have been mostly right! How do you find atomic number? Number of protons How do You find atomic mass? protons + neutrons What is the oxidation reaction of Mg? Mg+2 What is the process called when hydrogen and hydroxide are combined? Neutralization What kind of bonding occurs when opposite changes are attracted to one another? ionic bonding atomic mass proton + Neutrons dispersion forces (London dispersion forces) the weakest of all molecular interactions, are caused by the motion of electrons What is the charge of magnesium? 2+ moles to grams conversion Multiply What is the systematic name for ammonia ? Nitrogen Trihydrate What do catalysts do? speed up the rate of a chemical reaction without being consumed lowers the amount of activation energy for a chemical reaction What does the law of conservation of energy state? Energy cannot be created or destroyed, it simply changes form. What is the term for the amount of heat necessary to raise the temperature if 1 gram of that molecule by 1 Celsius? Specific heat What value is more acidic ? 6.1(the lowest number) what is the scientific notation of 1.15 to 10 power -3 0.00115 An isotope is the same number of protons but different neutron Which is true ? Fe(-) is smaller then Fe where can you find eletrons? orbit What is the process called when you are most likely to encounter an electron? obrital?? what is the strongest type of bond? covalent bond What is NAOH considered in the equation? left side=Reactant what forms of water can be seen on earth? liquid vapor gas what structure is formed from two amino acids and a peptide bond? protein what is an example of an alloy? two metals Carbon-14 8 Neutrons 6 protons 6 electrons polyatomic for copper(1) cyanide Cu+CNatomic number protons Found of the earth soild ,liquid ,gas What is a transition metal? Fe Zn Cu Ag Co Where is magnesium located second row and second column What is the charge of oxygen? 2- what is the name for ammonia? NH3 what is the charge of noble gases? 0 Polarity is ? based on the difference in electronegativity values for the elements involved What reactions takes place in the nucleus to obtain stable nuclear configurations? Nuclear reactions The attraction of one dipole to another is? Dipole interactions Which change of matter is when no change is made to the chemical composition of a substance? Physical Matter that changes in volume with changes in temp and pressure ? Gas Matter that has a definite volume and a definite shape is a ____. Solid what is Fe and what kind of metal is it? it is a transition metal and its called "iron" What happens when a substance is mix? its is chemically changed what is van der waals equations? Pv=nRT K(potassium) charge +1 What does ammonia have? Nitrogen and Hydrogen Grams to Moles conversion divide by molar mass

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