I need help with up till g if possible! and 4 Lecture Problems (Due 113 before l

Question

I need help with up till g if possible!

and 4 Lecture Problems (Due 113 before lab on separate piece of paper) Lecture a. Consider the following 101-98.76-0.01 = 12.23 The answer with the correct number of sig figs should have one, two, three, four, or more? The answer when using a calculator is 138.6516854. How many sig figs should you have? of sig figs. If it is correct, say so. b. Consider 1(5.6789-5.6700) c. For each mathematical operation, the calculator answer is given. Determine the answer with the correct number ii, 123-121.1 = 1.9 iii. 123 x 121.1 = 14895.3 d. e. Calculate the mass, in kilograms, of lead (density = 11.3g/mL) having a volume of 0.425 L. A particle consists of 17 protons, 18 electrons and 20 neutrons. Is the particle a cation, anion, atom, compound or a subatomic particle? f. Two isotopes of an element differ in their symbol, number of protons, atomic number or atomic mass? g. Isotopes do not have the same number of electrons, protons, electrons, atomic number or charge? h. Which is most likely to be ionic: Ba12, NC13, SiO2, or SF4? i. Consider the following reaction: A+2B 3C+4D 2.0 mole of A and 3.0 mole of B react to form 1 mole of C. Determine limiting reagent of this reaction

Explanation / Answer

(a) =2 significant figures present.... Which are present on the RHS of decimal

(b) 7 significant figures

(c) (ii) is correct

(d) we know that density = mass/volume

Therefore mass=density x volume

Mass =11.3 x 0.425

Mass =4.802 kg

(e) it is an anion because instead of 17 electrons 18 electrons are there

(f) atomic mass

(g) electrons

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