Answer as many as you can , 40 points (only right answers don't guess) 1. at approximately 50°c and 0.5 kpa, what phase of matter is water in? * a. solid b. liquid c. vapor d. both liquid and vapor 2. a sample of neon occupies a volume of 375 ml at stp. what will be the volume of the neon if the pressure is reduced to 90.0 kpa? * a.422 ml b.422 l c. 333 ml d. 333 l 3. a gas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? * a. 2.16 l b. 0.463 l c. 0.207 l d. 4.82 l 4. what pressure will be exerted by 0.650 mol of a gas at 30.0°c if it is contained in a 0.700 l vessel? * a. 2340 kpa b. 2340 atm c. 231 kpa d. 231 atm 5. the vapor pressure of water is * a. high due to very weak intermolecular attractions b. high due to water's polarity c. low due to water's high specific heat d. low due to relatively strong intermolecular attractions 6. which mixture contains the largest particles? * a. solution b. suspension c. colloid d. emulsion 7. how does evaporation of a liquid differ from boiling a liquid? 8. describe the tyndall effect and how it could affect my drive home on a foggy night.

answer: your mm

explanation:

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

since electrons are negative the answer is neagtaive