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iogann1982 [59]
3 years ago
15

Which element is a liquid at STP? 1.bromine 2.cesium 3.francium 4.iodine

Chemistry
1 answer:
nexus9112 [7]3 years ago
4 0
Bromine. both Bromine and Mercury are both a liquid at STP. :)
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How many valence electrons are there in an argon atom?
Evgen [1.6K]

Answer:

eight

Explanation:

Hence, from the above given configuration it is clear that the number of valence electrons in the Argon atom is eight.

6 0
2 years ago
Warm and cold fronts are formed by the movement of different air masses.
vekshin1
That is true because the warm air goes up and the cold air comes down 
3 0
3 years ago
Find the hydrogen ion concentration of a saturated solution of calcium hydroxide whose ph is 13. 1
salantis [7]

The pH of the solutions is 12.67.  

     

<h3>What is pH of a Solution?</h3>

pH is the measurement of how acidic or basic a solution is. The range of pH values is from 0 to 14. Lower pH values mean higher acidity, while higher pH means higher basicity. If the pH value is equal to 7, then the solution is neutral.

To calculate the pH of the solution, a few approaches are possible. Here, the pOH of the solution is calculated first using the molar concentration of  OH^{-1} ions. Because pH + pOH = 14, the pH of the solution can then be calculated by subtracting pOH from 14.

Because 2 moles of OH^{-1} ions are formed per mole of Ca(OH)_{2}dissolved, the pOH of a saturated Ca(OH)_{2} solution at  20^{.C} is,  

Concentration (C_{OH}) of OH^{-1} ions,

          C_{OH}   = 0.02335 mol Ca(OH)_{2}/L  X 2 mol OH^{-1} /1 mol Ca(OH)_{2}

            C_{OH} = 0.0467 mol OH^{-1}/L

*pOH of saturated Ca(OH)_{2} solution,

                                   pOH = -log [C_{OH}]

                                   pOH = -log [0.0467 mol OH^{-1}/L ]            

                                  pOH = 1.33  

*pH of saturated Ca(OH)_{2} solution,

                                   pH = 14 - 1.33

                                   pH = 12.67

Hence, the pH of the solutions is 12.67.

Learn more about  pH of the solutions here:

brainly.com/question/6988456

#SPJ4

4 0
2 years ago
How do you predict the product of<br> 1) __Be + __O2<br> 2) __SO2 + __ H2O
ahrayia [7]
1) 2Be +O2--> BeO
 Be has a charge of 2+, and O has a charge of 2-. The coefficients cancel out leaving BeO

2) SO2+ H2O--> H2SO3
 

5 0
2 years ago
Why isn't color a useful diagnostic property for a mineral?
Lerok [7]
Cause the color of a mineral can change do to chemical reaction like rust on iron

6 0
3 years ago
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