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solmaris [256]
3 years ago
12

Sulphate is written as SO42-, what does the “4” represent and what does the “2-“ represent?

Chemistry
1 answer:
amm18123 years ago
3 0
(SO4)2 The SO4 = 4 oxygen and having a 2 like that (SO4)2 makes it have 2 S, and 8 O’s
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Vedmedyk [2.9K]
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6 0
3 years ago
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Whitney's lung capacity was measured as 3.3 l at a body temperature of 37 ∘c and a pressure of 746 mmhg . how many moles of oxyg
myrzilka [38]

the ideal gas equation is PV=nRT  
 where P=pressure  
 V=Volume  
 n=no. of moles  
 R=universal gas constant  
 T=temperature  
 The universal gas constant (R) is 0.0821 L*atm/mol*K    
 a pressure of 746 mmhg =0.98 atm= 1 atm (approx)   
 T=37 degrees Celsius =37+273=310 K (convert it to Kelvin by adding 273)    
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 Solution:  
 (1 atm)(0.7 L)=n(0.0821 L*atm/mol*K)(310 K)  
 0.7 L*atm=n(25.451 L*atm/mol)  
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4 0
3 years ago
Is there a reaction between o2 and potassium iodide? If there is, please write it​
Soloha48 [4]

Answer:

Explanation:

Potassium iodide reacts with oxygen in presence of water to produce potassium hydroxide and potassium diiodoiodate(I) .

5KI + 2H₂O + O₂ =4 KOH + I₂ + K(II₂) .

7 0
3 years ago
How many atoms are in 2.70 moles of iron (Fe) atoms? (2 points)
Travka [436]
Hey there!

2.70 moles of Fe x (6.022 x 10^23) atoms of Fe    = 1.63 x 10^24 atoms of Fe
                             _______________________
                                       1 mole of  Fe

Answer: 1.63 x 10^24 atoms of Fe

Hope this helps :)
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3 years ago
MnO2(s) + 4HCl(aq) →MnCl2(aq) + Cl2(g) + H20
Llana [10]

Answer:

c

Explanation:

4 0
4 years ago
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