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Simora [160]
3 years ago
8

On. pe. Where is the Hubble telescope located?

Chemistry
2 answers:
Lubov Fominskaja [6]3 years ago
6 0

Answer:

space

Explanation:

melomori [17]3 years ago
4 0

Answer:

It is located "in space"

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Which one of the following is not an agent of chemical weathering?
irakobra [83]

Answer:

its proprionic acid which do not cause any hazardous effect on environment it only effect internal body of human if it is ingested.

Explanation:

7 0
2 years ago
Find the hydroxide ion concentration of a HBr solution with a pH of 4.75
Sunny_sXe [5.5K]
1st find the pOH = 14 - 4.75 = 9.25
then do 10^-9.25 = 5.62x10^-10 OH- concentration
8 0
3 years ago
When performing labratory experiments, which of the following items is ALWAYS necessary to use?
densk [106]
All of the the answers are are correct but a fume hood is more for if you are dealing with chemicals that can produce fumes the are deadly to people
3 0
3 years ago
X là este no, đơn chức, mạch hở. Xà phòng hóa một lượng cần 100ml dung dịch KOH 1M , thu được 11,2 gam muối ; và 3,2 gam ancol.
Evgesh-ka [11]

Answer:

Giá trị xà phòng hóa hoặc số xà phòng hóa (SV hoặc SN) biểu thị số miligam kali hydroxit (KOH) hoặc natri hydroxit (NaOH)

3 0
3 years ago
A solution is made by dissolving 0.0150 mol of HF in enough water to make 1.00 L of solution. At 26 °C, the osmotic pressure of
Alex777 [14]
Given:
M = 0.0150 mol/L HF solution
T = 26°C = 299.15 K
π = 0.449 atm

Required:
percent ionization

Solution:
First, we get the van't Hoff factor using this equation:
π = i MRT
0.449 atm = i (0.0150 mol/L) (0.08206 L atm / mol K) (299.15 K)
i = 1.219367

Next, calculate the concentration of the ions and the acid.
We let x = [H+] = [F-]
[HF] = 0.0150 - x

Adding all the concentration and equating to iM
x +x + 0.0150 - x = <span>1.219367 (0.0150)
x = 3.2905 x 10^-3

percent dissociation = (x/M) (100) = (3.2905 x 10-3/0.0150) (100) = 21.94%

Also,
percent dissociation = (i -1) (100) = (</span><span>1.219367 * 1) (100) = 21.94%</span>
7 0
3 years ago
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