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Murljashka [212]
3 years ago
9

Kara shines a blue light and a red light onto paper as shown in the figure below. If the paper is

Chemistry
1 answer:
boyakko [2]3 years ago
5 0

Answer:D. neither red nor blue

Explanation:

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PLEASE HELP FAST!! How much energy (in calories) is need to melt 3.0 moles of ice?
Viktor [21]

Answer:

Energy

Explanation:

The heat required to change the phase of a substance is given by the equation:

Q= mL (Q= Heat required, m= mass, L= Latent Heat of Fusion/Evaporation/Anything else).

So, according to your values:

Q= 3.0 kg x 333 kJ/Kg

So, Q= 999 kJ

4 0
3 years ago
A solid reactant is placed into a beaker of a warm water. The liquid vigorously bubbles as the solid dissolves into the solution
Andrej [43]

Answer:

Fewer bubbles will be produced because of fewer collisions of reactant molecules

Explanation:

As the solid dissolves into the solution after the liquid has been vigorously bubbled, if the temperature of the liquid is reduced a little, what will happen is that fewer bubbles will be produced as a result of lesser amount of collisions occurring between the reactant molecules

3 0
3 years ago
Read 2 more answers
Draw the alkane formed when 4,5,5-trimethyl-1-hexyne is treated with two equivalents of hbr.
AveGali [126]
<h3>Answer:</h3>

             The Alkane formed is 5,5-dibromo-2,2,3-trimethylhexane. as shown below in attached scheme (Green Color).

<h3>Explanation:</h3>

                        Alkynes like Alkenes undergo <em>Electrophillic Addition Reactions</em>. The reaction given is a two step reaction. In step 1, the Alkyne adds first equivalent of HBr obeying <em>Markovnikov's rule</em> (i.e. Bromine will add to carbon containing less number of hydrogen atoms) and forms <em>2-bromo-4,5,5-trimethylhex-1-ene</em>. In step 2, the alkene formed in first step (2-bromo-4,5,5-trimethylhex-1-ene) undergoes addition reaction with the second equivalent of HBr via Markovnikov's rule to produce <em>5,5-dibromo-2,2,3-trimethylhexane</em>.

The scheme is attached below, Blue color is assigned to starting Alkyne, Red color is assigned to intermediate Alkene and Green color is assigned to product Alkane respectively.

3 0
4 years ago
Read 2 more answers
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Aneli [31]
Dihydrogen oxide is the right answer. Dihydrogen oxide is just 2 hydrogen and 1 oxygen which is H2O or water.
6 0
3 years ago
What contains most of earths water
nikitadnepr [17]
The ocean hold 97 percent of earths water.
5 0
3 years ago
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