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liraira [26]
3 years ago
11

Need help on this can someone help me

Chemistry
1 answer:
julsineya [31]3 years ago
8 0
I think it’s true false true.
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An engine is running by burning coal. Which statement is correct?
timama [110]
C is the answer hove a great day
5 0
3 years ago
The mass percent of Cl⁻ in a seawater sample is determined by titrating 25.00 mL of seawater with AgNO₃ solution, causing a prec
Serga [27]

Answer:

2.5 %

Explanation:

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For AgNO_3 :

Molarity = 0.2850 M

Volume = 63.30 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 63.30 × 10⁻³ L

Thus, moles of AgNO_3 :

Moles=0.2850 \times {63.30\times 10^{-3}}\ moles

Moles of AgNO_3  = 0.0180405 moles

Moles of AgNO_3  = Moles of Cl^-

Thus, Moles of Cl^- = 0.0180405 moles

Molar mass of Cl^- = 35.453 g/mol

Mass = Moles * Molar mass = 0.0180405 moles * 35.453 g/mol = 0.6396 g

Volume of sea water = 25.00 mL

Density = 1.024 g/mL

Density = Mass / Volume

Mass = Density * Volume = 1.024 g/mL * 25.00 mL = 25.6 g

Mass\ \%=\frac{Mass_{Chloride ion}}{Total\ mass}\times 100

Mass\ \%=\frac{0.6396}{25.6}\times 100

<u>Mass percent of Cl⁻ = 2.5 %</u>

4 0
3 years ago
What acceleration does the force of earths gravity produce?
valentina_108 [34]
(a) 9.8 m/s/s

This never changes.
8 0
3 years ago
Read 2 more answers
When two or more substances are physically combined the result is a:.
sp2606 [1]

Answer:

I think it is called a Mixture

Explanation:

Sorry if it is wrong

5 0
3 years ago
In order for fission reactions to be successful, they must be self-perpetuating, meaning they must be able to keep themselves go
aleksandrvk [35]

Answer:

Option C is correct.

The minimum amount of material that is needed for a fission reaction to keep going is called the critical mass.

Explanation:

Nuclear fission is the term used to describe the breakdown of the nucleus of a parent isotope into daughter nuclei.

Normally, the initial energy supplied for nuclear fission is the energy to initiate the first breakdown of the first set of radioactive isotopes that breakdown. Once that happens, the energy released from the first breakdown is enough to drive further breakdown of numerous isotopas in a manner that leads to more energy generation.

But, for this to be able to be sustained and not fizzle out, a particular amount of radioactive material to undergo nuclear fission must be present. This particular amount is termed 'critical mass'

Hope this Helps!!!

3 0
3 years ago
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