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2 years ago

Can radiation carry thermal energy from object to object?

Chemistry

2 answers:

Anni [7]2 years ago

5 0

Yes it can carry thermal energy from one object to the other because of the explanation above !

Viktor [21]2 years ago

3 0

Answer:

Radiation is the transfer of thermal energy by waves that can travel through empty space. When the waves reach objects, they transfer thermal energy to the objects.

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Please help I’ll mark Brainlyist !! (No links)

hjlf

Answer:

A is correct option you can go for it

7 0

2 years ago

Read 2 more answers

Need help with the question

Sloan [31]

Answer:

for a i think it is choice 2

for b i think it is the first choice

Explanation:

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2 years ago

A 0.25-mol sample of a weak acid with an unknown Pka was combined with 10.0-mL of 3.00 M KOH, and the resulting solution was dil

Masteriza [31]

Answer : The value of $pK_a$ of the weak acid is, 4.72

Explanation :

First we have to calculate the moles of KOH.

$\text{Moles of }KOH=\text{Concentration of }KOH\times \text{Volume of solution}$

$\text{Moles of }KOH=3.00M\times 10.0mL=30mmol=0.03mol$

Now we have to calculate the value of $pK_a$ of the weak acid.

The equilibrium chemical reaction is:

$HA+KOH\rightleftharpoons HK+H_2O$

Initial moles 0.25 0.03 0

At eqm. (0.25-0.03) 0.03 0.03

= 0.22

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

$pH=pK_a+\log \frac{[HK]}{[HA]}$

Now put all the given values in this expression, we get:

$3.85=pK_a+\log (\frac{0.03}{0.22})$

$pK_a=4.72$

Therefore, the value of $pK_a$ of the weak acid is, 4.72

7 0

2 years ago

How do the isotopes hydrogen-1 and hydrogen-2 differ?

g100num [7]

<span>Hydrogen-2 has one neutron; hydrogen-1 has none</span>

4 0

3 years ago

Read 2 more answers

Mg + 2H20 + Mg(OH)2 + H2 + 353kJ

mixer [17]

Answer:

$m_{H_2O}=8.9g$

Explanation:

Hello,

Based on the given reaction, since magnesium and water are in a 1:2 molar ratio at the reactants, we must apply the following stoichiometric factors to compute the complete reaction of the 6.0 g of magnesium:

$m_{H_2O}=6.0gMg*\frac{1molMg}{24.305 gMg}*\frac{2molH_2O}{1molMg} *\frac{18gH_2O}{1molH_2O} \\\\m_{H_2O}=8.9g$

Best regards.

7 0

2 years ago