4. (2 pts) For 1,2-dichlorobenzene, calculate the masses (to 5 significant figures) and relative abundances (to...
Calculate the relative intensities of the major molecular ions of 1,2-dibromo-1,1,2,2-tetrachloroethane
2. An element has 2 naturally occurring isotopes with the following masses and abundances A. Calculate the atomic weight of the element. (20 pts) Isotope mass Percentage 34.97 amu 75.78% 36.97 amu 24.22% B. What is the element? C. How many neutrons does the heavier isotope have? (Round to whole number) D. How many electrons does the element have? E. What type(metal/nonmetal) of element is it? F. If the element above gains 1 electron what neutral element has the some...
QUESTION 5 An element has 4 stable isotopes. The masses and percent abundances for the isotopes are m1 = 135.907 amu (0.185 %) m2 = 137.906 amu (0.251 %) m3 = 139.905 amu ( 88.450 %) m4 = 141.909 amu Based on this information, the chemical symbol for the element is , it has protons, and the number of neutrons in the heaviest isotope is
Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer?1) 210.10 g+235.100g2)210.100 g + 235.10 g3) 210.1 g + 235.1 g4) 210.10 g+ 235.10 gI think the answer is 2 but I don't know the reason why.
Question 3 4 pts How many significant figures should be in your answer when you convert 0.04070 m to units of nm? Question 4 4 pts Which of the following should exist as separated ions when dissolved in water? OBr2 CCH CH3CH OH • H₂O₂ KNO, auntini
2. Consider two masses conne two masses with friction". Assume that there is a significant friction between mass m, and the supporting, horizontal surface. What must be the value of the coefficient of kinetic friction u. for the two masses to move at a constant velocity? The constant velocity means that the acceleration a 0. Derive the formula for u, relative to masses m, and m. Remember that the condition for constant velocity is that the sum of forces acting...
Calculate the fractional (relative) uncertainty in (16.33 ± 0.08)cm. Round your answer to three significant figures.
Cite your answer in Sl units and to three significant figures. D Question 1 5 pts Two ice pucks (one orange and one blue) of equal mass are involved in a perfectly elastic glancing collision as shown in the figure below. The orange puck is initially moving to the right at Vol 6.0 m/s.strikes the initially stationary blue puck, and moves off in a direction that makes an angle of - 24° with the horizontal axis while the blue puck...
Calculate: Part A) [H+] for [OH−]=3.5×10^-4 M Express your answer using two significant figures. Part B) [H+] for [OH−] =8.4×10^-9 M Express your answer using two significant figures. Part C) Calculate [H+] for a solution in which [OH−] is 100 times greater than [H+]. Please show how you solved it, thanks! Part A Calculate (H+] for Express your answer using two significant figures. VO AED ? Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining The ion-product...
Problem 2: (6 pts)) Two masses are connected by a string as shown in the figure below. Mass mp 2.00 kg moves up while ma 12.0 kg moves down a frictionless inclined. The pulley is frictionless and has a mass M 2.00 kg, and a radius R 0.200 m (1- MR?) (a) Draw the free body diagram for the masses and pulley separately (b) Use Newton's Second Law of Motion to find the resulting acceleration 2pts) of both masses. (c)...