Chemistry

Density of ethanol is .789g/ml if ethanol were placed in water then which substance would form a layer on top of the container
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How is a niche different than a habitat?A habitat is more than a physical place; it's a species' role in a specific place and it can change from niche to niche.A niche is more than a physical place; it's a species' role in a specific place and it can change from habitat to habitat.A niche and a habitat are the same.A niche is just a physical place; a habitat is a species' role in a specific place.
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if 203 mL of water is added to 5.00 mL of 4.16 M KCl solution, what is the concentration of the dilute solution
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If 5.4 g of NaNO3 is dissolved in 350 mL of water, what is the molarity of the solution?
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What is the volume of the Earth in comparison to the Sun? How many Earths wouldwe need to equal the volume of the Sun?
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Nitrogen gas was collected by water displacement. What was the pressure of the N2 collected if the temperature was 50 degrees celcius?
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In photosynthesis, what are the two major reactions that take place?
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one home is heated by burning wood in a fireplace, while another similar home is heated by burning oil. which method uses less fuel? why?
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Examples of gravitational potential energy.
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how many atoms are in 50 grams of calcium
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The percent yield of a reaction in which 52 grams of a reactant is expected to yield 30 grams of product is 25%. What is the actual yield of the reaction? A) 13 grams B) 120 grams C) 208 grams D) 7.5 grams
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Which of the following is a chemical reaction?1- Dropping a sliced orange into a vat of Sodium Dydroxide2-Cutting a piece of paper into two pieces3-Filling a balloon with air4-Freezing liquid Mercury
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A fox spots a rabbit in a field. The fox begins to chase the rabbit, and the rabbit runs away. Which statement best describes the rabbit's behavior in response to the stimulus of being chased? Select one: The rabbit's behavior is a response caused by an internal stimulus. The rabbit's behavior is a tropism. The rabbit's behavior is a fight-or-flight response. The rabbit's behavior is a response caused by hunger.
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The Ka for benzoic acid is 6.5 105. Calculate the pH of a 0.12 M benzoic acid solution.
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What should happen if a good experiment is replicated?The results will decrease.The results will increase.The results will be different.The results will be similar.
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Which of the following is a chemical property of liquid water?Its density is 1.00 g/cm3.It reacts with sodium metal to form sodium hydroxide and hydrogen gasIt flows.It freezes to form ice.It boils at 100C.
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Which shows an isomer of the molecule below?
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You will use a filter funnel in this experiment toA )measure pHB) collect pieces of cabbage C) dry pieces of cabbage D) separate cabbage from liquid
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You use a 15.0 gram piece of aluminum foil to cover a pan in the oven. The specific heat for aluminum is c = 0.900 J/g o C. If the temperature is raised from 25 o C to 350 o C, how much heat was absorbed?
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Where does your body get the energy needed to transform into kinetic energy to move around all day
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Several atmospheric gases contribute to global warming: carbon dioxide, methane, and nitrous oxide. Considering this, which choice would do the LEAST to directly reduce atmospheric carbon dioxide.
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Consider this reaction:N2 (g) + 3H2 (9) = 2 NH3 (9). If Q ea, which statement is true?O A.The reaction will move forward.B.The reaction will move in reverse.C.The concentration of the product should decrease.D.The concentrations of the reactants should increase.E.The reaction is in equilibrium.
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The endocrine system sends hormones through the blood to control the activities of tissues and organs.Group of answer choicesa. Trueb. False
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How does the pressure of a container change as the volume is changed?
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