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Chemistry
Chemistry
College
Kinetic and potential energy are two types of energy that relate too
Chemistry
High School
It's how many atoms are in two water molecules (H2O)?
Chemistry
High School
pls help me with this question
Chemistry
College
Answer the following questions in the space provided. 1. Classify each of the following as a homogeneous or heterogeneous substance. a. iron ore b. quartz c. granite d. energy drink e. oil-and-vinegar salad dressing f. salt g. rainwater h. nitrogen 2. Classify each of the following as a physical or chemical change. a. ice melting b. paper burning c. metal rusting d. gas pressure increasing e. liquid evaporating f. food digesting 3. Compare a physical change with a chemical change.
Chemistry
High School
what would you expect to see if a piece of copper metal is placed in a solution that contains nickel(II) ions?A. copper atoms become copper(II) ionsb. nickel ions become solid nickelc. no reaction happensd. a precipitate forms that contains copper and nickel ions
Chemistry
High School
A neutral atom of an element has three energy levels and two valence electrons. Which element in the periodic table does this describe?
Chemistry
College
how many moles of methane are there in a 10g sample?
Chemistry
High School
after the nutrients are extracted, where does the food go, waiting to be expelled?
Chemistry
High School
A chemist must prepare of aqueous copper(II) sulfate working solution. He'll do this by pouring out some aqueous copper(II) sulfate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in of the copper(II) sulfate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits.
Chemistry
College
What is conduction? Transfer of heat through circular movement Transfer of heat through direct physical contact Transfer of heat through electromagnetic waves Transfer of heat through the movement of part
Chemistry
College
Question 20 of 66Which of the following species has the same number of protons as Fe3+?A) Mn3+B) Co2+C) Fe2+D) NitE) CO3+
Chemistry
High School
Select the correct answer from each drop-down menu.Why do some transition metals have multiple oxidation states?Transition metals have multiple oxidation states because of their (a. completely filled b. partially filled c. empty) (s, p, d, or f) sublevel.
Chemistry
College
The combination of two or more atoms, from the same or different elements, creates a(n).a. elementc. moleculeb. atomd. mixturePlease select the best answer from the choices provided Pls help!!!! Fast!!!BD
Chemistry
College
calculate the molarity of a solution made by dissolving 3.7 moles of sodium chloride in 8.7 liters of water?
Chemistry
Middle School
How many atoms are in Fe(OH)2
Chemistry
High School
Match each description below with the name of the local wind system being described. warm, dry downslope wind affecting Southern California monsoon wind blowing from a valley up a mountain slope valley breeze a seasonally changing wind Santa Ana wind generated by cold thunderstorm downdrafts haboob
Chemistry
High School
If we know the force of an object in Newtons) and we know how fast the object accelerates in ms"), then we can easily find the mass of the object bydividing the _ by the _
Chemistry
High School
Which are examples of harmful mutations? Check all that apply. One that causes a person to have a light patch of hair color one that changes a mouse's eye shape but not its eyesight O one that allows a moth to blend into its environment one that reduces a bean plant's ability to make food one that increases the plants susceptibility to disease
Chemistry
High School
period and group PLEAAE CHECK OUT THE QUESTIONNS IMAGE
Chemistry
High School
Can somebody please help me with this ASAP!
Chemistry
College
How do elements tend to structure the molecules of life?
Chemistry
High School
Which is a base unit used in the metric system?
Chemistry
College
1) The speed constant was determined for the first order decomposition of an organic compound at various temperatures:Calculate the activation energy for the reaction. Build a graph of Arhenius 2) The hydrolysis of sucrose. in which a sucrose molecule is broken in a glucose molecule and a fructose molecule, is part of the digestive process. Calculate the speed constant for the hydrolysis of sucrose at 35,0 C knowing that k=1,0x10^-3 L mol^-1s^-1 at 37 C and that the activation energy is 108kj mol^-1
Chemistry
High School
which process do ribosomes perform
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