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Chemistry
Chemistry
High School
Heat rising in a hot-air balloon is an example of __________. conduction convection radiation solar
Chemistry
College
All of the following changes to a metal are physical changes except_____.bendingmeltingrustingpolishing
Chemistry
College
Which properties of grains determine the texture of rocks? Check all that apply.feelpattern colorshapesizeI will mark Brainlyest
Chemistry
College
The vaporization of Br2 from the liquid to the gas state requires 7.4 kcal/mol. write a reaction showing heat as a product or reactant
Chemistry
High School
Where does the heat that is needed to warm the surface of the ocean come from? A. the Sun B. the Earth's interior C. animals D. the Earth's surface
Chemistry
College
C2H6OPercent Composition with work shown
Chemistry
High School
the amount of space an object occupies is called its
Chemistry
High School
A chemist burns 0.8 g of iron in oxygen. The iron reacts to form 1.1 g of iron oxide. Calculate the mass of oxygen that reacted with the iron.
Chemistry
High School
A train travels at an average speed of 25 miles per hour. How long does it take the train to travel 2000 miles?
Chemistry
Middle School
I have 7 more questions left :)
Chemistry
High School
Which of the following has the smallest radius? A. Br-B. BrC. I-D. I
Chemistry
High School
What are the seven most abundant elements?
Chemistry
High School
what are 2 physical changes in the carbon cycle?
Chemistry
Middle School
Heather is investigating the properties of light and how it travels. She places a glass on the windowsill and waits for the sun to shine on the glass and observes what happens. Next, she places a piece of cardboard in front of the glass. Which statement describes the results of her observations?A Since glass is translucent, most of the light energy was reflected from the glass. B When the cardboard was placed in front of it, the cardboard absorbed some of the light energy.C The light from the sun was able to travel through the glass. When the cardboard was placed in front of the glass, it absorbed the light energy from the sun and converted it into heat energy.D The glass absorbed the light and converted the light energy into heat energy. When the cardboard was placed in front of the glass, the heat was transferred from the glass to the cardboard. When the sun hit the glass, the light energy was absorbed. When the cardboard was placed in front of the glass, it absorbed the light energy from the sun and converted it into heat energy.
Chemistry
High School
Please help me with this question after I have help with my questions i will be giving away 50 points to 4 people to keep on the look out on my page xxx
Chemistry
High School
Explain what happens if you change the number of protons in an element? Plzzz helpppp!!!
Chemistry
High School
What kinds of organisms have "naked" DNA?
Chemistry
High School
How many moles do you have if you have 8.03 x 1023 atoms of oxygen?
Chemistry
Middle School
The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?a.3c.6b.5d.7
Chemistry
College
In chemical reactions, what does the law of conservation of mass mean?Group of answer choicesMatter is not created nor destroyed.The total mass of the products is greater than the total mass of the reactants.The total mass of the reactants is less that the total mass of the products.Matter is not changed.
Chemistry
High School
Which characteristic of a substance is considered a chemical property?its boiling pointits reactivityits densityits conductivity
Chemistry
High School
Which of the following is an example that includesevidence of a chemical reaction?
Chemistry
High School
How is the human body like a stone arch?
Chemistry
College
A deck of cards has dimensions 8.9cm x 5.72cm x 1.82 cm. What is the volume of the deck in cubic centimeters?
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