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Chemistry
Chemistry
High School
A piece of metal is composed of atoms Each atom in the metal contains 29 protons how is the metal classified
Chemistry
College
A solution has a pH of 6. What is true about the solution? A. It is a strong basic solution. B. It is a weak acidic solution. C. It is a weak basic solution. D. It is a strong acidic solution.please help me
Chemistry
College
The reaction between HCl and KOH results in an increase in temperature in the solution. Select the correct statement from the list below.a) this is an endothermic reactionb) this is a phase change reactionc) this is a vaporization reactiond) this is an exothermic reaction
Chemistry
High School
where is lithium used in the body?
Chemistry
College
I need help with this
Chemistry
College
Calculate the number of moles in 2.60 grams of SnO2 ? Please show your work to receive credit.
Chemistry
High School
Whats this called Please ASAP
Chemistry
College
Help plzzzzzzzzzzzzzzz
Chemistry
College
the de broglie equation predicts that the wavelength (in m) of a proton moving at 1000 m/s is what? (h=6.63 x 10^-34Js; mass od a photon = 1.673 x 10^-24
Chemistry
High School
which of the following do all living organisms have in common ?
Chemistry
College
If an object has a density of 6.05 g/cm3 and a volume of 36.5 cm3, what is its mass?
Chemistry
Middle School
To investigate how mechanical energy affects the number of times a ball will bounce back, Maria dropped a ball from three different heights. Which of the following would be a reasonable conclusion from this experiment? The height from which a ball is dropped does not affect the number of times it bounces. Increasing the height will give the ball more energy and will increase the number of times it bounces. Increasing the height will give the ball less energy and will decrease the number of times it bounces. Decreasing the height will give the ball more energy and will increase the number of times it bounces.
Chemistry
College
The boundary between cold and warm air masses is called a ____.A.frontB.stormC.climateD.flood
Chemistry
High School
All of the following are examples of making physical changes EXCEPT:A:painting wallsb:Making ice cubesC:Making oxygen out of waterD:chopping wood
Chemistry
High School
density of a piece of wood that has a measurement of 24 cm3 and 768 g
Chemistry
College
What is the pH of a bleach solution that has a [OH]=1.3104 M?
Chemistry
High School
A helium-filled balloon is released into the atmosphere. As the balloon rises, whichwould MOST likely increase and cause the balloon to burst?O the volume of the heliumO the mass of the heliumo the temperature of the heliumO the density of the helium
Chemistry
High School
Once upon a time, Walter the water molecule was traveling around Linda's blood. He was enjoying moving around wherever he wanted. One day, Walter decided to visit some cells. He traveled in and out of the cells as he pleased. Walter decided that he liked the cells so much that he wanted to stay inside and rest in the vacuole. However, as the day went on, Walter felt a change happening around him. Linda had eaten some VERY salty popcorn. Walter LOVED Sally the salt molecule and felt a magnetic attraction to her. The closer the salt came to the cell, the quicker Walter's love for Sally pulled him out of the cell and towards the salt.
Chemistry
High School
You put a drop of food coloring into a container of room temperature water and watched as the color spread out in the water. Describe what caused the color to spread. (You do NOT stir it)
Chemistry
High School
What would happen to the rate of a reaction if the concentration of substrate was increased after the point of saturation?a)The reaction rate would increase.b)The reaction rate would decrease.c)There would be no effect.
Chemistry
College
ppm is used to describe very small amounts of substance?
Chemistry
High School
The valence electrons are those found in the highest energy ____ and ___ orbitals ^Please help ASAP Ill mark you as brainlister FILL in the blank
Chemistry
High School
What does the 188 represent in Tantalum-188A. mass number B. atomic numberC. mass defect
Chemistry
College
how many moles of h2 can be made from the complete reaction of 3.5 moles of al?Given: 2Al+6HCL 2Alcl3+3h2
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