Chemistry, 21.05.2021 16:50 ozheng24112
Students perform several experiments recording the reactions in lab journals. The students
write and balance the chemical equations for each reaction and include the state of matter
notations for each compound. The equations are below
Experiment 1
Equations from Experiments
MgO(s) + H2O(l) + Mg(OH)2(aq)
4Fe(s) + 302(g) - 2Fe2O3(5)
SO3(g) + H2O(1) - H2SO4(aq)
Experiment 2
Experiment 3
Which chemical involved in the student experiments is dissolved in water?
A Fe2O3
B
Fe
C Mg(OH)2
D
MgO
Answers: 3
Chemistry, 21.06.2019 21:00
Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.
Answers: 2
Chemistry, 21.06.2019 23:00
A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?
Answers: 1
Chemistry, 22.06.2019 10:30
Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2
Answers: 1
Chemistry, 23.06.2019 03:20
High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?
Answers: 3
Students perform several experiments recording the reactions in lab journals. The students
write an...
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