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Chemistry
Chemistry
High School
Which example is a type of matter?A. My science teacherB. WaterC. My chromebookD. All of these are types of matter.
Chemistry
High School
why each component does not change at all even when combined?
Chemistry
High School
In the equation below how many molecules are there? Ba(OH)2
Chemistry
College
Draw the structure of the product that is formed when the compound shown below undergoes a reaction with PhMgBr and then is treated with water.
Chemistry
High School
Fossil fuels are an important natural resource used by society. Which of the following best describes fossil fuels?a.They are any liquid fuel derived from once-living matter.b.They are organic fuels derived from ancient plants and animals.c.They are fuels in which dinosaur fossils are commonly found.d.They are naturally occurring inorganic fuels like coal and petroleum.Please select the best answer from the choices providedABCD
Chemistry
High School
Which properties change the composition of a substance? A physical propertiesB chemical properties C chemical and physical properties D neither chemical nor physical properties
Chemistry
High School
A scientist develops a new experiment to test atomic theory. His results do not agree with the theory.What will most likely happen next?Scientists worldwide will reject atomic theory because of the new results.The scientist will change his results to agree with the accepted theory.Other scientists will reject the results because they do not agree with the theory.The scientist will repeat the experiment to make sure that his results are reliable.
Chemistry
High School
What does this represent about the type of changehappening in the container?O A chemical change started immediately and finishedat eight minutes.O A non-chemical change started immediately andfinished at eight minutes.O A chemical change occurred at four minutes.O A non-chemical change occurred at four minutes.
Chemistry
High School
When writing 6,020,000 in scientific notation, it is correctly written as:1. 6.02 x 10 ^62. 6.02 x 10 ^-63. 0.602 x 10 ^-84. 602. x 10 ^6
Chemistry
High School
select the correct answer
Chemistry
High School
Which biomes would be found nearest to the equator?tropical rain forests and savannastundras and taigastropical rain forests and taigastundras and savannasPLS HELP ASAPILL GIVE BRAINLY
Chemistry
High School
Scientific theories are always
Chemistry
College
Nitric acid is made by a sequence of reactions, shown below. 4NH3(g) +5O2(g) = 4NO(g) + 6H2O(g)2NO(g) + O2(g) = 2NO2(g)3NO2(g) + H2O(g) = 2HNO3(g)+ NO(g)If the first reaction occurs with 96.2% yield, the second reaction occurs with a 91.3% yield and the third reaction proceeds with a 91.4% yield, calculate the following:(a) The grams of nitric acid produced from 1216 grams of ammonia. (b) The percent yield for the overall process
Chemistry
College
QuestionsVacuoles are round organelles found in both plant and animal cells. Their primary function is to -produce food and energy for the cell.control the activities of the cell.transport materials between parts of the cell.Ostore water, waste, and nutrients for the cell.
Chemistry
High School
Match the terms to their definition. 1. element one of the starting substances (ingredients) that is involved in a chemical reaction 2. heterogeneous the substance that does the dissolving 3. homogenous a substance that is made from only one type of atom. 4. product composed of dissimilar parts which can be separated easily and which are unevenly distributed in the mixture 5. reactant even distribution of parts throughout the whole mixture; not easily separated into individual components 6. solute the substance that is dissolved 7. solvent the substance created as a result of a chemical reaction
Chemistry
High School
You placed 18.4 g of aluminum shot into a graduated cylinder containing 25.50 mL of water. If the water level rises to the 39.10 mL mark, what is the density of aluminum?
Chemistry
College
Explain the "Law of Conservation of Mass". Provide an example to support your explanation
Chemistry
High School
9. Which is not a form of electromagnetic radiation?O radio wavesO gravityO gamma raysO visible light
Chemistry
College
List the color of the stars from hottest to lowest:
Chemistry
High School
point2) A car travels 60 m to the right and then 30 m to the left. What distancehas the car traveled?
Chemistry
High School
please help me and explain if you can
Chemistry
College
During the 1800s, when most of the elements were beingdiscovered, many chemists tried to classify the elementsbased on their:a Similaritiesb Atomic massc Atomic numbersd None of the above
Chemistry
High School
Which of the following is a possible genotype for the offspring
Chemistry
College
What do potassium, titanium, and iron have in common?
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