Chemistry, 10.03.2021 01:50 kdcloyd88191
What happens when an electrically charged pencil is placed close to the water running from a faucet?
the pencil attracts the water
the pencil becomes positively charged
the water attracts the pencil
the water repels the pencil
Answers: 1
Chemistry, 22.06.2019 03:00
Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture
Answers: 1
Chemistry, 22.06.2019 05:50
Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.
Answers: 3
Chemistry, 22.06.2019 10:30
What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature
Answers: 1
Chemistry, 22.06.2019 19:20
Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?
Answers: 3
What happens when an electrically charged pencil is placed close to the water running from a faucet...
Mathematics, 12.12.2019 07:31
Mathematics, 12.12.2019 07:31
Mathematics, 12.12.2019 07:31
History, 12.12.2019 07:31
Social Studies, 12.12.2019 07:31
Mathematics, 12.12.2019 07:31
Mathematics, 12.12.2019 07:31
Mathematics, 12.12.2019 07:31
Social Studies, 12.12.2019 07:31
Physics, 12.12.2019 07:31
Mathematics, 12.12.2019 08:31
Mathematics, 12.12.2019 08:31