Chemistry

How/ why does weather "happen," on Earth?
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Olivia looked under a microscope and saw tiny protists moving around on the slide from water in a pond near her house. She remembered what shehad learned about the cell theory as she observed the protists moving. Which three ideas are included in the cell theory?A New cells are produced from existing cellsB. Cells are the basic units of structure and function of living organismsC Cells are the basic units of structure and function in animals onlyD. Cells divide when they begin to grow too large to functionE All living things are made of cellsE Cells are able to divide and produce new materialstheir daughter cells.
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Write a balanced equation and name the products of the reaction CaCl2+Na3(PO4)
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When magnesium ium is left in moist air for several hours, the metal Sur face taanishes?why
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The amount of energy needed to change a liquid to a solid is calculated using the enthalpy of ________ and has a __________ sign on the energy value.
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If 65.8 grams of SO3 are produced in the unbalanced reaction below, how many grams of oxygen reacted? SO2(g) + O2(g) > SO3(g) Show work please.
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Answer the following;Pls helppp
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Question 5 (Fill-In-The-Blank Worth 2 points)(03.05 LC) The number that represents a neutral pH is _______.Numerical Answers Expected!Answer for Blank 1:Question 6(Multiple Choice Worth 2 points)(03.05 MC) Which item is made from an acidic ingredient? Detergent Soap Ammonia VinegarQuestion 7(Multiple Choice Worth 2 points)(03.05 MC) Which substances will make a salt when combined? Vinegar and tea Soda and wine Soda and ammonia Fertilizer and detergentQuestion 8(Multiple Choice Worth 2 points)(03.05 MC) Which description is not a property of an acid? pH lower than 7 Turns litmus paper blue Sour taste CorrosiveQuestion 9(Multiple Choice Worth 2 points)(03.05 MC) Complete the sentence. When an acid is added to water, hydrogen ions __________. increase decrease stay the same disappear
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an atom of chlorine has an amount number of 17 and a mass number of 37. how many protons neutrons, and electrons are in the atom?
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what are Metals that are less reactive than alkali metals and alkaline-earth metals called
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Calculate the empirical formula for acetaminophen(Tylenol)
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How does dissolving skittles apply to the real world?
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Calculate the mass of nitric acid required to make a 250mL solution with 2.40 phPlease show steps, I am trying to learn!
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Anyone mind answering this
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I want a pharmacist technician to help me with a question please
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If you only wanted to increase the particle motion of a gas without increasing any of its other properties, which would the most correct situation?a. Keep the gas at a constant pressure and keep the temperature constant, but increase the volume of the gasb. Keep the gas in a fixed container at constant pressure and increase the temperaturec. Keep the gas in a fixed container at constant pressure and decrease the temperatured. Keep the gas at a constant volume and keep the temperature constant, but decrease the pressure of the gas
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The heating system on the second floor is being fixed Dr Kline explained Please bring these extra blankets up there for the patience
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(BRAINLIEST QUESTION)Which answer below best describes what the law of Natural Selection is?Select one:a.Natural selection is the process where those members of a species that can survive environmental hardships reproduce the future offspring with their strong characteristics being passed on, thus evolving the entire species.b.Natural selection is the process wherein species evolve over time because those members with common traits tend to survive hardships and produce more offspring.c.Natural Selection is the law that states the the natural evolution of a species is dependent on the shifts of the environment.
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How many liters of 0.200 M sodium hydroxide do you need to titrate 0.300 L of a 0.100 M diprotic acid to the equivalence point?
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PLEASE HELP!!! I will mark Brainliest!!! How could you know if two substances were the same based upon 2 chemical reactions?
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what type of elements form ionic bonds with metals
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An unknown solution contains several chemical substances. By following a series of steps in a procedure, each of these substances can be isolated. Which of the following methods would be most appropriate for showing the steps needed to separate the substances? A. Draw a diagram of apparatus used. B. Create a flowchart of the various steps. C. Build a model of the various atomic structures. D. Construct a graph showing the times needed for each step.
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Which of the following statement is correct regarding motors and generator?
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A Air at a temperature of 134C and atmospheric pressure flows with a velocity of 7 m/s overa smooth 5 m long and 1 m wide cast iron plate. Under steady-state conditions, the air-sidesurface temperature of the plates is at 120C. Under the described conditions, determine theoverall heat transfer rate through the plate.B-If the flat plate in (A) is replaced with a cylinder with the same surface area (heat transferarea) and the cylinder's length is the same as the width of the plate (1.0 m), what would be theheat transfer rate for cross air flow over the outside surface of the cylinder?C. If the flat plate in (A) is replaced with a sphere with the same surface area (heat transfer area),what would be the heat transfer rate for cross air flow over the outside surface of the sphere?D- Based on your results, discuss which surface configuration is more effective for heat
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