35. Limonene used in cosmetics has side effects in the form of …. Irritation B. safe to use C. cytotoxic D. permanent damage to the skin 32. Which of the following statements about sunscreens is true? A. has a high protection efficacy against UV A B. the value will increase when using a combination of sunscreen C. is an absolute determinant of UV protection D. all answers are correct

Q: 7. Which two metals do magnets attract or repel? a. Gold and silver b. Platinum and titanium c. Iron…

A: Given statement is :  Which two metals do magnets attract or repel ?  Options are :  a. Gold and…

Q: As the wavelength of electromagnetic energy increases the energy of the photons_______

A: In order to understand this statement, we must understand how wavelength is related to Energy of the…

Q: The longest wavelength radiation is: a. Infrared b. (UV) ultraviolet light c. Gamma d. Microwave e.…

A: The energy of the radiation is quantized. The smallest unit of energy of the radiation is known as…

Q: Energy required when going from second excited to third excited rotational energy levels equals: a.…

A:

Q: What is the layer of the atmosphere that contains greenhouse gases? O A troposphere OR thermosphere…

A: The Earth's atmosphere has five different layers and they are Troposphere, Stratosphere, Mesosphere,…

Q: Phosphorescence is an effect that: O a. generally stands out by its emitted red colour O b.…

A: This is a process in which energy absorbed by a substance is released slowly in the form of light.…

Q: Draw a diagram like the one shown in Figure to predict a. the relative intensities of the peaks in a…

A: Spin-Spin splitting is a reciprocal property. If one proton splits another proton then the second…

Q: 1. What is the energy in Cal unit of one photon of microwave radiation with a wavelength of 550nm?…

A: Dear student , since you have posted multiple questions we will allow to solve only first question…

Q: A spectrum containing only specific wavelengths is called a(n) ________ spectrum. a. continuous b.…

A: The spectrum which containing light of all wavelengths, is called a continuous spectrum. Visible…

Q: I need help explaining why led bulbs are considered to be superior to other types of bulbs.

A: LED bulbs are generally known as light emitting diode bulb .

Q: If the photoelectric effect is observed when using blue light but not red light, the threshold…

A: The ejection of electrons in the photoelectric effect is directly proportional to the energy of the…

Q: 35 What does a Colorimeter directly measure? O a. Wavelength of light O b. The Strength of a…

A: What does colorimeter measure ?

Q: 27. Refer to the handout "Reference Absorption Spectra." Which gases produced this spectrum? A. iron…

A: Option A: This option is incorrect because the spectrum shown does not match the known absorption…

Q: What does Bernoulli's equation describe? A. Conservation of mass B. Conservation of energy in a…

A: Bernoulli's equation describes: B. Conservation of energy in a fluid flow  Bernoulli's equation is a…

Q: X-ray radiation has frequencies from 3.0x10 to 3.0x10 Hz, whereas the frequency region for infrared…

A: From given data,  Frequency of X-ray radiation is higher than frequency of infrared radiation.…

Q: One model of light depicts it as consisting of energyparticles known as ___________.

A: Light- a form of electromagnetic radiation that can be observed by the human eye and has a…

Q: How many grams of CuSO4 5H2O to make up 250 mL of a 0.2 M stock of this solution? Using M1V1 = M2V2…

A: Molar mass of CuSO4.5H2O is 250 g/mol. Let the number of grams of CuSO4.5H2O needed be x g.There…

Q: Be sure to have your electromagnetic spectrum readily available (Chapter 11 in text) 1. A…

A:

Q: 5. Light waves slowing down through medium to form a rainbow a.) Reflection b.) Refraction c.)…

A:

Q: Which of the following statements is FALSE? a.UV envelopes electronic transitions b.IR uses light…

A: Electromagnetic spectrum, the entire distribution of electromagnetic radiation  according to…

Q: ight spectrums are

A: We can see the object in the visible region of the electromagnetic waves. Its range is 380 nanometre…

Q: When a molecule absorbs a photon, one of its electrons is raised to the ______ state.      quantum…

A: Photons are smallest units of energy. They are the smallest unit of electromagnetic radiation. These…

Q: d. If light with a wavelength of 690 nm strikes the photocathode, what is the maximum kinetic energy…

A:

Q: How should you adjust your Bunsen burner when your flame is yellow?

A: To explain: How to adjust the Bunsen burner when the flame turns yellow.

Q: An excited electron cannot do which of the following? A. Transfer energy to a neighboring photon B.…

A: From the given data we need to find the fate of the excited electron.

Q: Which of the following is a true statement regarding the effect of UVR on cancer? A. increased in…

A: Ultraviolet rays present in sun radiation are absorbed by Ozone layer generally but now ozone is…

Q: QUESTION 9 What poperty of light is affected that explains the refraction of light through different…

A: Refraction of light in the presence of  different medium.

Q: Why are the results of flame tests for the alkali metal ions difficult to distinguish? (Choose all…

A: Flame test is used to identify the presence of metal ion particularly group 1 metal ions. It is…

Q: Radiation does not only behave as wave as indicated by: a. The shorter wavelength radiation seen in…

A: The Compton effect generally infers to the phenomenon by which the energy of photon decreases when…

Q: .What is the amplitude of a wave? A.the distance between two crest points of a wave B.the number of…

A: We know that, Amplitude : Amplitude is the  maximum displacement of the wave form its mean position.…

Q: Light from an sodium bulb emits ____________________, while the sun emits ____________________. a.…

A: Light from an sodium bulb emits __a line spectrum, while the sun emits a continuous spectrum. Option…

Q: :Expect values of the four quantum numbers of the following transient elements note: the electronic…

A: a) Cu is in +2 oxidation state b)Mn is in +2 oxidation state

Q: Which of the following statements describe phosphorescence? A. takes place when when electron in…

A: A. takes place when electron in excited energy is released and the molecules come back in ground…

Q: Which of the following best describes chemiluminescence Select one: O a. employs a fluorescent label…

A: The phenomenon of emission of visible light during a chemical reaction is known as…

Q: A Thermo-acoustic engine operates between hot temperature of 2000 K and a cold temperature of 300 K.…

A:

Q: Prussian blue makes your shirt whiter, why?  a. It bleaches b. It reflects blue wavelength of…

A: Introduction: Prussian blue or Berlin blue or Paris blue is produced by oxidation of ferrous…

Q: How Do Glow Sticks Glow?

A: The reason for that fluoroscent glow in the glow sticks ,in terms of chemistry can be best explained…

Q: Usage of synthetic colors has been restricted to a maximum limit of 199-200 ppm: a. True b. False…

A: Usage of synthetic colors has been restricted to a maximum limit of 199-200 ppm: a. True b. False…

Q: Protein A Hydration layer H₂N- C=O---H-N -C-CH3 H₂ -CH₂ CH3 H₂C-C- H -C-CH₂ H₂ H₂C-C- H₂ CN-H--O C…

A: Protein: Building block of proteins is an amino acid. The amino acids make a polypeptide chain…