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I'm having a hard time answering this . Please help and show all work . Thanks Calculate the atomic mass of copper if copper-63 is 69.17% abundant and copper-65 is 30.83% abundant
answered
Apr 16, 2019
Chemistry
college
1
vote
195k
views
Discuss the advantages and disadvantages involved with attempting to collect the patient balance due at the time of service.
answered
Jul 7, 2018
Health
middle-school
7
votes
113k
views
Which describes the term “deforestation”? movement of alien species into forest habitats production of forest habitats destruction of forest habitats removal of native species from forest habitats
answered
Jun 17, 2018
Biology
middle-school
6
votes
108k
views
What did the Enabling Act do? A. gave Hitler unlimited power for four years B. gave Mussolini unlimited power in the Italian government C. limited the number of seats the Nazis could hold in the Reichstag
answered
Apr 28, 2018
History
high-school
3
votes
121k
views
Read the excerpt from Dr. Martin Luther King’s “Letter from Birmingham Jail.” The Negro has many pent up resentments and latent frustrations, and he must release them. How does King conclude this claim?
answered
Mar 30, 2018
English
high-school
3
votes
205k
views
Did the Jim crow laws start in the mid- to late 1800s? 1. yes 2. no
answered
Jan 26, 2018
Social Studies
middle-school
6
votes
134k
views
According to your study unit, what is the main reason that improved human relations skills may improve your grades? A. Growing self-confidence can give you a "winning attitude." B. Enhanced human relations
answered
Jan 23, 2018
English
high-school
3
votes
132k
views
Suzanna wants to measure a board, but she doesn’t have a ruler to measure with. However, she does have several copies of a book that she knows is 17 centimeters tall. Suzanna lays the books end to end
answered
Nov 3, 2017
Mathematics
middle-school
6
votes
112k
views
Read the passage. But in every nation, as I said, there are a vast class who are cowardly, and more less stupid. Which best evaluates the reasoning in this passage? A) The reasoning is not sound; the author
answered
Mar 5, 2017
English
high-school
5
votes
153k
views
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