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Chemistry
Chemistry
College
8. As the temperature of a mixture increases, one part of the mixture may 2 pointsmelt while the other parts remain solid. *TrueOrFalse
Chemistry
College
HELP PLEASEA sudden gust of wind increases the velocity of a sailboat relative to the water surface from 3.0m/s over a period of 30.0s. Using the formula a=change in velocity /t, what is the average acceleration of the sailboat?2.5m/s21.2m/s225m/s20.083m/s2( the 2's are exponents)
Chemistry
High School
Josie draws models of the particles within a substance. Which model best represents the particles ina solid?DABC
Chemistry
College
A student is trying to determine the density of a piece of metal. She uses a balance and finds that the mass of the piece of metal is 15.36 g. To determine the volume of the metal she fills a graduated cylinder to 30.0 mL and then drops the piece of metal into the graduated cylinder. The final volume of the metal 34.1 mL. What is the density of the piece of metal
Chemistry
High School
What mass of potassium would react with excess chlorine to produce 156 g of potassium chloride?____ K + ____ Cl2 ____ KCl
Chemistry
College
Endothermic change is when energy enters a system. True or false?
Chemistry
College
Which of the following is/are true regarding initial and maximal velocity of enzyme-mediated reactions?a. At very low substrate concentrations, the initial velocity of an enzyme reaction will be lower than the maximal velocity of the enzyme reaction. b. When an enzyme behaves with Michaelis-Menten kinetics, the initial velocity of that enzyme reaction changes with substrate concentration, but the maximal velocity of that particular enzyme remains the same at a constant enzyme concentration and identical reaction conditions c. Initial velocity is maintained until maximal velocity is reached. d. The initial velocity is determined by the slope of the line at the beginning of a reaction when one plots the experimental results of reaction time versus product formed. Maximal velocity is then determined by when the initial velocity no longer significantly changes with increasing substrate concentration.
Chemistry
High School
Which of the following elements has the strongest attraction for the electrons in a bond?(A.) hydrogen(B.) lithium(C.) bromine(D.) astatine
Chemistry
College
An animal is an example of a/an-A: tissue B:cell typeC:organD:organism
Chemistry
College
A tire is inflated physical or chemical ?
Chemistry
High School
Given the following two quantities: 0.50 mol of CH4 and 1.0 mol of HCl,a. Which has more atoms?b. Which has more molecules?c. Which has the greater mass?d. Which has the greater volume at the same temperature and pressure (both are gases)?
Chemistry
High School
WILL MARK YOU BRAINIEST
Chemistry
College
A barium atom (Ba) would form its most stable ion by the 1. gain of one electron. 2. loss of one electron. 3. loss of 56 electrons. 4. gain of two electrons. 5. loss of two electrons.
Chemistry
High School
simple device that makes climbing easier
Chemistry
College
1pt Copper chloride and aluminum react to producealuminum chloride and copper. Which of thefollowing is the correctly balanced chemicalequation for this reaction?O A. CuCl, + Al -> AICI, + uO B. 3CuCl, + Al -> AlCl, + 2CuOC. 3CUCI, + 2Al -> 2AICI, + 3CuOD. CuCl, + 3Al -> AICI, + 2Cu
Chemistry
High School
State the law of multiple proportions.
Chemistry
College
Air masses carry their own weather.TrueFalseThe question is number 8
Chemistry
College
Explain how the direction of the arrow in the bond dipole symbol ( ) relates to the elec-tron density and the partial charges.
Chemistry
High School
What is the proper value for F in the above table? A. 28 B. 30 C. 2+ D. 2-
Chemistry
High School
Why are summer days longer than winter days on Earth?A. During the summer, Earth's rotational axis is parallel to the Sun's rotational axis.B. During the summer, Earth is at the point in its orbit when it is closest to the Sun.C. The region of Earth experiencing summer rotates past the Sun more slowly than the region experiencing winter.D. The region of Earth experiencing summer is tilted toward the Sun while the region experiencing winter is tilted away from the Sun.PLEASE HELP ITS A TEST
Chemistry
High School
0.000999893 sig figs, scientific notation
Chemistry
College
How would kinetic energy of the dominoes be affected if the first domino did not hit the second one?(((20 points)))
Chemistry
High School
(sand) and (Sand with water) both of them are heterogeneous mixture isn't it?
Chemistry
College
The compound ammonium phosphate is a strong electrolyte. Write the transformation that occurs when solid ammonium phosphate dissolves in water.
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