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Mn được sử dụng như là một chất chuẩn nội để xác định Fe bằng phương pháp quang phổ hấp phụ nguyên tử (AAS). Một dung dịch chuẩn chứa Mn 2.00 microgam/mlvà Fe 2.50 microgam/ml cho tỉ lệ tín hiệu Fe/tín
asked
Jan 8, 2022
Chemistry
college
1
answer
0
votes
226k
views
Which of the following activities occurs in both prokaryotic cells and eukaryotic cells?
asked
Sep 19, 2021
Biology
high-school
1
answer
0
votes
210k
views
TIMED! Read this passage from the farewell address George Washington wrote at the end of his presidency. The alternate domination of one faction over another, sharpened by the spirit of revenge, natural
asked
Apr 7, 2021
History
high-school
1
answer
4
votes
27.8k
views
How did bombing campaigns of world war 2 differ from carried out in earlier conflicts?
asked
Mar 17, 2021
History
middle-school
1
answer
2
votes
129k
views
If an economy with C = $5000 + 0.6Yd, I = $1000, G = $800, T = $1000, NX = $-200, where the dollar amounts are in millions of dollars, both government spending and taxes are raised by $200 million, what
asked
Feb 22, 2021
Business
high-school
1
answer
1
vote
78.9k
views
Who is the author and what do you know about her of a quilt of a country
asked
Feb 18, 2021
English
college
2
answers
1
vote
119k
views
The price of a stock on February 1 is $124. A trader sells 200 put options on the stock with a strike price of $120 when the option price is $5. The options are exercised when the stock price is $110.
asked
Jan 25, 2021
Business
high-school
1
answer
4
votes
155k
views
Conjugate acid/base problems: a. What are the conjugate bases of the molecules: i. C6H5OH? ii. CH3-SH iii. CH3-CH2-CO2H b. What are the conjugate acids of the molecules: i. CH3–(CH2)-CO2- ii. CH3–(CH2)-NH2
asked
Jan 24, 2021
Chemistry
college
1
answer
0
votes
33.5k
views
The sum of two numbers is 9 and their difference is 7
asked
Jan 18, 2021
Mathematics
high-school
1
answer
5
votes
75.6k
views
Explain why we see the Milky Way as a faint band of light stretching across the sky.
asked
Oct 8, 2020
Physics
college
1
answer
1
vote
121k
views
F(n)=2n+4 g(n) = 4n - 2 Find f (g(2))
asked
Sep 5, 2020
Mathematics
middle-school
1
answer
4
votes
216k
views
Which inequality is equalivalent to |x-4|<9
asked
Jul 20, 2020
Mathematics
middle-school
1
answer
2
votes
173k
views
Who have more populatipn de smalls country or the big
asked
Jan 22, 2020
History
middle-school
1
answer
5
votes
94.8k
views
What are daily values only a general guide to the amount of nutrients you need each day?
asked
Jan 8, 2020
Health
middle-school
2
answers
5
votes
118k
views
In a sentence 5 words. Outcome: Resolution: Impromptu: Tentatively:
asked
Jul 20, 2019
English
college
1
answer
4
votes
2.8k
views
Who became the leader of the Knights of Labor in 1879?
asked
Apr 16, 2018
Social Studies
middle-school
2
answers
2
votes
174k
views
Simplify completely quantity 3 x plus 18 over 18 . (1 point)
asked
Feb 14, 2018
Mathematics
high-school
2
answers
3
votes
59.6k
views
Which defines a circle
asked
Oct 18, 2017
Mathematics
high-school
1
answer
1
vote
91.2k
views
What happened to the world’s population between 1950 and 2000?
asked
Jul 5, 2017
Social Studies
high-school
2
answers
2
votes
195k
views
Largeat to smallest 1/4 2/9 4/12
asked
Jun 16, 2017
Mathematics
college
1
answer
2
votes
200k
views
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