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Montano1993 [528]
2 years ago
7

Which type of electromagnetic waves has more energy, an ultraviolet wave or an infrared wave?How can you tell this by looking at

the electromagnetic spectrum?
Chemistry
1 answer:
Nitella [24]2 years ago
8 0
Ultraviolet has more energy. You can tell because it has a shorter wave. The longer the wave is on the electromagnetic spectrum the less energy is stored. 
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A scientist studies the DNA of three different species. The DNA from species A is more similar to DNA from species B than DNA fr
rewona [7]
DNA A and B are probably the most closely related because cells get DNA from the parent cells therefor similar DNA comes from relatives.
5 0
3 years ago
The ph of 0.015 m hno2 (nitrous acid) aqueous solution was measured to be 2.63. what is the value of pka of nitrous acid?
Licemer1 [7]
Nitrous acid<span> dissociates as follows:
</span>
HNO₂(s) ⇄ H⁺(aq) + NO₂⁻(aq) 
           
According to the equation, an acid constant has the following form:

Ka = [H⁺] × [NO₂⁻ ] / [HNO₂] 

From pH, we can calculate the concentration of H⁺ and NO₂⁻:

[H⁺] = 10^-pH = 10^-2.63 = 0.00234 M = [NO₂⁻]

Now, the acid constant can be calculated:

Ka = 0.00234 x 0.00234 / 0.015  = 3.66 x 10⁻⁴

And finally,

pKa = -log Ka = 3.44 


7 0
2 years ago
If the kitchen door is closed, how will that affect your ability to smell cooking odors in your room?
Aleonysh [2.5K]

Answer:Even if your door is closed, you would still smell the odors because of the space under the door and the space that is needed to close the door.  

Explanation:

6 0
2 years ago
Read 2 more answers
Write the balanced COMPLETE ionic equation for the reaction when
Vera_Pavlovna [14]

Answer:

Ba²⁺(aq) + 2 NO₃⁻(aq) + 2 Rb⁺(aq) + 2 OH⁻(aq) = Ba(OH)₂(s) + 2 Rb⁺(aq) + 2NO₃⁻(aq)

Explanation:

Let's consider the molecular equation between barium nitrate and rubidium hydroxide to produce barium hydroxide and rubidium nitrate.

Ba(NO₃)₂(aq) + 2 RbOH(aq) = Ba(OH)₂(s) + 2 RbNO₃(aq)

The complete ionic equation includes all the ions and the molecular species.

Ba²⁺(aq) + 2 NO₃⁻(aq) + 2 Rb⁺(aq) + 2 OH⁻(aq) = Ba(OH)₂(s) + 2 Rb⁺(aq) + 2NO₃⁻(aq)

3 0
3 years ago
5. The reaction of magnesium oxide with hydrochloric acid carried out in a calorimeter caused the
saul85 [17]

Answer:

kek w

Explanation:

kek w

5 0
2 years ago
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