Chemistry

Can someone help? Thank you.
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As an electron in an atom moves from a higher energy state to a lower energy state, the atomAbecomes a negative ion.becomes a positive ion.releases energyD.absorbs energy
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[EARTH SCIENCE]Hi, can anyone help please? Thank uuuu!!! :DThe relationship between the average distance of a planet from the sun and the planets orbital period is described by the....A. Law of ellipses.B. Law of equal areas.C. Law of motion.D. Law of periods.
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The drummer is the best performer. What is the noun in this sentence
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What is the volume, in liters, of 1.4 moles of CO2 gas at STP?
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Which answer is it for number 7
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To calculate the atomic mass of an element, the percentabundance of etch isotope is needed. ?
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patient requires blood transfusion. what is the next thing to do? discuss
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How many total atoms are present in the compound: Mg(OH)_2
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Polyester is a synthetic material used for many different purposes. It is produced from petroleum and natural gas. Producing polyester from these natural resources requires many steps and uses other chemicals that are potentially harmful. Polyester production also requires a lot of energy. Although polyester is not biodegradable, it is easily recyclable.Which statement about synthetic materials is best supported by the example of polyester? A. Using synthetic materials has a negative impact on the environment, but using natural materials does not. B. Synthetic materials created from petroleum and natural gas are difficult to produce and to recycle. C. Materials that are created from natural resources affect the environment more than those that are not. D. Producing certain synthetic materials could have a greater environmental impact than disposing of them.
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50 PTS!!!!!What type of chemical reaction is Aerobic Cellular Respiration?
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H2O decomposes to hydrogen and oxygen as describe in thefollowing reaction:2H20 (1) 2H2 (9) + O2 (9)What is the mole fraction of hydrogen gas in the products?a 0.5b 0.33C 0.4d 0.67
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Can anyone pls answerrrrt
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How many atoms are in 80.45 g of magnesium with explanation
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Describe echolocation. Give an example of an animal that uses echolocation.
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Balance the following equation: __Na+__HO __NaOH+__H *
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It takes 120 mL of 0.15 M of carbonic acid (H2CO3) to neutralize 300 mL of sodium hydroxide (NaOH) for the following balanced chemical reaction:2NaOH + H2CO3 N2CO3 + 2NaOHThe concentration of the sodium hydroxide _____.
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13. will any of the bulbs light if you open the switch?14. which bulbs would continue to shine if bulb 1 broke? which would shine if bulb 2 broke instead? Explain.
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how do you Calculate the molarity of 250 ml of solution in which 2.7 g of MgCl2 are dissolved
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Page. 5. What is the position of alkali metals in the Modern periodec table.
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what is the difference between hypertonic and hypotonic
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copper cannot be used as an anode in electrolysis of water
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Which of the following best represents a chemical change? A. Chopping wood B. Silver tarnishing (changing color) C. Grape kool-aid mix dissolving in water D. Dry ice turning into a gas (sublimation- a change of state)
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what is the chemistry of super glue
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