3 years ago

Help please!!!!!! ASAP

Chemistry

1 answer:

uysha [10]3 years ago

5 0

Answer:

Have you tried googling it

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Why does energy spread out evenly if there's only a 21% chance that energy spreads out evenly?

Harrizon [31]

Answer:

It has to do with increasing the entropy of the universe.

Explanation:

The modern definition of entropy is that it is the extent to which a system is able to disperse its energy. Energy (such as heat!) likes to spread itself out, so that as many states as possible are occupied with the least amount of energy.

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3 years ago

An infrared wave has a wavelength of 0.00005 m. What is this wavelength in

Serjik [45]

Answer:

B. $5 \times {10}^{ - 5}\: m$

Explanation:

$0.00005 \: m= 5 \times {10}^{ - 5} \: m \\$

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3 years ago

I need help with number 8 and fast it's due tomorrow. :)

EastWind [94]

Nuetrons+protons. and number 7 is electrons and protons

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3 years ago

The compound NaOH(s) dissolves in water to yield

fomenos

When Sodium hydroxide (NaOH ) reacts with H2O the reaction is - Na ( positively charged ) + OH ( with negative charge ) + H2O , therefore B should be the answer .

5 0

4 years ago

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How many grams of NaOH (MW = 40.0) are there in 500.0 mL of a 0.225 M NaOH solution?

Akimi4 [234]

Given: Molar mass of NaOH=40 g/mol

Volume of NaOH solution=500 mL

Molarity of solution=0.225 M

Molarity of solution is defined as number of moles of solute in 1 L of solution. Thus,

$M=\frac{n}{V}$

Thus, to calculate the mass of NaOH, first calculate its number of moles by rearranging the above equation and putting values of volume and number of moles.

$n=M\times V=0.225 M(\frac{ mol/L}{1 M})\times 500 mL(\frac{10^{-3} L}{1 mL})=0.1125 mol$

Now, number of moles are related to mass as follows:

$n=\frac{m}{M}$

Here, M is molar mass

Rearranging and putting the values of number of moles and molar mass thus,

$m=n\times M=0.1125 mol\times 40 g/mol=4.5 g$

Therefore, mass of NaOH in 500 mL of 0.225 M NaOH solution is 4.5 g.

6 0

3 years ago

Read 2 more answers