49. Solid raw materials in cosmetics that will gradually react with carbon dioxide in the air to form harsh compounds that can irritate the skin are.... A. zinc stearate B. bentonite C. ZnO D.TiO2 50. The color of glowing white skin in the skin is determined by the compilers of .... A. eumelanin B. phaeomelanin C. oxyhemoglobin D. keratohyalin

49. Solid raw materials in cosmetics that will gradually react with carbon dioxide in the air to form harsh compounds that can irritate the skin are.... A. zinc stearate B. bentonite C. ZnO D.TiO2 50. The color of glowing white skin in the skin is determined by the compilers of .... A. eumelanin B. phaeomelanin C. oxyhemoglobin D. keratohyalin

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter20: The Representative Elements

Section: Chapter Questions

Problem 70E

See similar textbooks

Similar questions

What is the experiment isolation of casien about? how is it relevant to real world applications? Describe the overall purpose of the experiment?
Part of a routine blood test is to check the level of sodium in your blood. It is optimum to have between 135 and 146 micromoles per milliliter of sodium. Having an amount too high or too low can cause a variety of health issues. Sodium has a molecular mass of 23 grams per mole [g/mol]. A blood sample is 1.3 [mL]. Determine the minimum mass of sodium that must be present to surpass the upper optimum limit of 146 micromoles per milliliter.
explain it also
Determine the value of R for deuterium (2H) and tritium (3H) using equation 15.3. You will have to look up the masses of the D and T nuclei. By what percentage do these R values differ from that for hydrogen?
In 1995, Mario Molina, Paul Crutzen, and F. SherwoodRowland shared the Nobel Prize in chemistry for their work onatmospheric chemistry. One of several reaction sequences pro-posed for the role of chlorine in the decomposition of strato-spheric ozone is (1) Cl(g) +O3(g)→ ClO(g) +O₂(g) (2) ClO(g) +ClO(g)→ Cl₂O₂(g) (3) Cl₂O₂→ (g)2Cl(g)+ O₂(g).Over the tropics, O atoms are more common in the stratosphere:(4) ClO(g) +O(g)→ Cl(g) +O₂(g).(a) Which, if any, of these are oxidation-reduction reactions?(b) Write an overall equation combining reactions 1–3
Q1-Complete the blanks? 1-Including water, the five most common gases in the atmosphere listed in decreasing order of their abundance are......... 2-The bottom layer of the atmosphere is the...........................and the nextlayer up is called the ……... 3- The most significant feature of atmospheric chemistry is the occurrence of........................resulting from he absorption by molecules of.................... designated ...................... 4-At very high altitudes, normally reactive species such as atomic oxygen, O, persist for long periods of timebecause.......................................... 5-The maximum intensity of incoming solar radiation occurs at a wavelength around .......................................andoutgoing radiation from Earth has maximum intensity at a wavelength of around.....................................................
What is the atom economy, E-factor, and effective mass yield of this reaction??
23.38, omit c
you are designing a rocket engine th uses a mixture of hydrazine and water as a propellant. this engine will be mounted to an unmanned drone bound for hydrazine for the return launch. how much will this hydrazine weigh on the surface on venus express this quanitity in Newtons. the molecular formula of hydrazine is N2H4, you may assume the molecular weights of nitrogen and hydrogen are 14 and 1 g/mol, respectivly. Gravitational acceleration on Venus is 8.87m/s^2.
Ozone is most depleted in Antarctica although very few people live there. Scientists believe that this is observed because: a) there are many coal powered plants there b) the cold climate favors the formation of atmospheric ice crystals which catalyze ozone decomposition c) The abundance of polar bears compensates for the low human population d) the Russians are conducting secret research there which emits gases which destroy ozone
2??
Consider the table. Metal Tm (K) ΔHfus (kJ/mol) Tb (K) ΔHvap (kJ/mol) LiLi 454 2.99 1615 134.7 NaNa 371 2.60 1156 89.6 KK 336 2.33 1033 77.1 RbRb 312 2.34 956 69 CsCs 302 2.10 942 66 Using the data, calculate Δ?fusΔSfus and Δ?vapΔSvap for Cs.Cs. Δ?vap=ΔSvap= JK⋅molJK⋅mol Δ?fus=ΔSfus= JK⋅molJK⋅mol