ability of impurities to lower the melting point of a sample

Q: Compared with 31P, the radioactive isotope 32P has(A) a different atomic number.(B) one more…

A:

Q: A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds…

A: Answer is b.)  salt.

Q: Solidification is the process of changing the state of the material from .. ........ powder to solid…

A: Matter is something that consumes space and has mass. All matter is made out of components,…

Q: The most abundant elements

A: Macromolecules are the type of large and complex molecules. These are formed by the condensation of…

Q: Radiation is the emission and propagation of high speed electrons in an x-ray tube in the form of…

A: Introduction X-rays are a type of radiation called electromagnetic waves. X-ray imaging creates…

Q: 2. Which of the following are physical properties of covalent network solids? Choose ALL that apply.…

A: Covalent network solids are a special group of molecules bonded b covalent bonds. The bonds from 2D…

Q: Which of the following are properties of water that make itimportant for living cells?(a) It is a…

A: All living organisms require water for survival. Water has many uses for organisms and exhibits many…

Q: Generally YAC contains how many elements?a) 1b) 2c) 3d) 4

A: YAC stands for yeast artificial chromosomes and is widely used in the field of genetic engineering.…

Q: 8. When evaporation process is done, what happens to the liquid substance in a mixture? * O A. It…

A: 8. Evaporation is the process of separating dissolved solid in liquid. the liquid gets evaporated to…

Q: in a solution, the solvent is:  A) always a gas  B) always water C) the substance that is…

A: A solution is a uniform and stable mixture of solute and solvent. Solute particles are invisible in…

Q: The most abundant elements in the foods and beverages you consume are oxygen, carbon, hydrogen, and…

A: The chemical elements are the components used to build up the human body. Humans can assemble…

Q: What is the function of the flame in AAS? O lonozation of sample O Atomization of sample O boling of…

A: Guystav Kirchoff and Robert Bunsen first used atomic absorption spectroscopy in 1859 for identifying…

Q: What is the problem caused by 2. P. In your own words, what is acid rain? acid rain? 4jn your own…

A: Acid rain occurs when acid is produced in both wet and dry forms, such as raindrops and snow.

Q: 6. A slug can be killed by pouring salt onto it’s surface. Explain the science behind this…

A: Introduction :- Salt is a mineral comprised mostly of sodium chloride, a chemical component that…

Q: The test for starch in water is   A. silver nitrate.   B. iodine.   C. barium ions.   D.…

A: Starch is a homopolysaccharide molecule that was composed of alpha-D-glucose units in 1-4 and 1-6…

Q: Some Processes and Their Associated Environmental Problems 1. The burning of garbage produces…

A: Pollution: It is the contamination of the environment with pollutants. Pollutants are harmful…

Q: The mass number of an atom depends primarily on the number of protons and neutrons. positrons.…

A: An atom is the smallest unit of any matter. It has three subatomic particles; neutrons, protons, and…

Q: Atoms of the same element that differ only in the number of neutrons are known as

A: Always the number of protons is same in atoms of the same element. Number of neutrons may vary for…

Q: a certain element consists of two stable isotopes. the first has a mass of 138 amu

A: Atoms of an element having same atomic number but different mass number are called isotopes of that…

Q: Which of the following is not a deprotonated substance: a) KOH b) LiOH c) HA d) B

A: Protonation is the addition of proton and deprotonation means the removal of the proton.

Q: Which of these substances are considered hazardous waste? A. Corrosive materials B. Flammable…

A: Introduction Hazardous waste is defined as waste that comprises organic or inorganic components or…

Q: 1. trace elements can also be essential elements 2. compounds consist of elements at a fixed ratio…

A: First, let's discuss the trace elements. The trace elements are the chemical elements whose…

Q: 1. Particles are in close contact with one another leading to strong forces of attraction and…

A: There are four different states of matter. Solid,liquid,Gas,Plasma When small molecules are packed…

Q: In the Chemical Changes experiment (E3) on copper, which of the steps can be omitted if our goal is…

A: The cycle of copper reactions basically a cyclic chain of multiple reactions involving copper, as…

Q: Refer to the table below: Oil Sample Saponification Number [A] 179 [B] 260 [C] 193 [D] 185 ✓ Which…

A: Saponification number represent the number of milligrams of KOH required to neutralize 1g of fat.…

Q: Why does salt melt ice? O a it lowers the freezing point of water O b it heats up the ice O c it…

A: Normally water freezes at 0°C to form ice.This is the normal freezing point of ice. Upon additon of…

Q: To make a 1:100 dilution of a concentrated solution, you could O Mix 1 ml concentrated solution and…

A: Dilution in chemistry is the process of lessening the concentration power of a solute by adding in…

Q: 3. Why are we able to look at the melting temperature of a solution and use Kr values in our…

A: The atomic bonding strength of any substance is indicated by its melting point. on applying…

Q: A solution with a pH of 2 has a hydrogen ion concentration that is _______________ the hydrogen ion…

A: pH is a measure of the negative logarithm of the hydrogen ion concentration.  Given Values: pH = 2.0…

Q: Precipitation is one of the main processes involved in the water cycle. It involves the formation of…

A: Precipitation- Falling of water from the cloud in the form of rain, hail or sleet During formation…

Q: Sodas typically contain sugar, flavorings, coloring agents, and carbon dioxide dissolved in water.…

A: The aqueous solution is a mixture of solution which contain water as solvent and solute can be gas,…

Q: (4) The normal melting point of gold is 1064.5 °C and its boiling point is 2660 °C. (a) Convert…

A: Temperature is measured in 3 different scales namely Celcius, Fahrenheit, and Kelvin.  Celcius is…

Q: f a body of water is to support life, its dissolved oxygen should be _____ ppm or mg/L.

A: Water at lower temperature should have higher mg/L of dissolved oxygen and higher %DO while warmer ,…

Q: 13-bioactive materials refers to c) A material, which upon being placed within the human body…

A: note - according to our guidelines ,we are supposed to answer only one. Answer of question number…

Q: a 139 ng sample of radioactive material has a half life of 4.2 days how many ng of radioactive…

A: GIVEN: The initial mass of radioactive material = 139 ng Half-life =4.2 days Number of half lives= 3…

Q: 3. You do a paper chromatography experiment using the same conditions as outlined in the simulation.…

A: Chromatography is a technique of separation of different component present in a given sample.

Q: 8. is a clay type with a hydrogen bond? O Montmorillonite O Kaolinite O Vermiculite O Beidelite

A: Clay consists of minerals which are a complex of alumino-sillicates means oxides of aluminium and…

Q: 1. What is the picture showing to us? Why did you say so? 2. Which instrument or device was used to…

A: Option ( 1)-- the picture is showing isotopic radioactive iodine test of thyroid by thyroid scan .…

Q: 3. Sometimes bubble tea parlors make too many boba for one day. To avoid waste, the bubble tea…

A: Solute molecules  and solvent  blend with each other to make up solution . Solution is categorised…

Q: 2. In orange juice which of these is the solvent? O Water O orange juice concentrate O sugar alcohol

A: The solute is the substance which gets dissolved where as the solvent is the substance in which the…

Q: 3. Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has…

A: Fatty acids are the hydrocarbon chains with the carboxylic group. The hydrocarbon chains of fatty…

Q: Solution A is 20 degrees celsius, Solution B is 80 degrees celsius (both are the same kind of…

A: The amount of heat required per unit mass to increase the temperature by one degree Celsius is known…

Q: The smallest unit of an element that still retains thedistinctive behavior of that element is an…

A: Given: Choose the correct answer: The smallest unit of an element that still retains the distinctive…

Q: Which of these materials are not removed during the water treatment process? Viruses Bacteria O…

A: The filtration process during the water treatment allows the pure water moves across filters having…

Q: 2. The water potential of pure water Is (a) less than zero (b) more than zero but less than one (c)…

A: Plants exhibit a well-developed system for the movement of water throughout their body. Imagine a…

Q: A water solution contains 60% Na2S202 together with 1% soluble impurity. Upon cooling to 10°C,…

A: Please check my hand written answer

Modes of Nutrition

It is a biological process of providing or obtaining food that is necessary for growth and health. It includes many physiological processes - absorption, ingestion, assimilation, catabolism, excretion, etc. In biology, the science that deals with nutrition's physiological and chemical processes are called "nutritional science."