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natta225 [31]
3 years ago
5

FILL IN TH BLANK PLEASES 8TH GRADE SCIENCE!!!!

Chemistry
1 answer:
asambeis [7]3 years ago
5 0

The elements helium neon and Exon are all part of the same _______ on the periodic table.


B. Group

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What is the pH of a solution that<br> contains [H+]=3.18 x 10^-8 M?
Xelga [282]

Answer:

7.50

Explanation:

pH=-log(H3O+)

- Hope that helps! Please let me know if you need further explanation.

4 0
3 years ago
A student requires 2.00 L of 0.100 M NH4NO3 from a 1.75 M NH4NO3 stock solution. What is the correct way to get the solution?
Sonbull [250]

Answer: Measure 114 mL of the 1.75 M solution, and dilute it to 2.00 L.

Explanation:

The number of moles in the solution will remain same on dilution and thus according to Molarity Equation:

M_1V_1=M_2V_2

M_1= molarity of first solution

V_1= Volume of first solution

M_2= molarity of second solution

V_2= Volume of second solution

0.1\times 2.00L=1.75M\times V_2

V_2=0.114L=114ml

Thus 114 ml of 1.75 M solution is taken and the volume is diluted to 2.0 L to make 0.100 M solution.










3 0
3 years ago
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I'LL MARK U BRAINLIEST-How many kW does a nuclear power plant use in a year?
Lisa [10]

Answer:

Nuclear power comes from nuclear fission

Nuclear power plants use heat produced during nuclear fission to heat water. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plan

Explanation:

8 0
2 years ago
When 0.25 moles of NH3 are produced according to the reaction below, how many moles of H2 must have reacted?
marissa [1.9K]

Answer:

Explanation:

by stoichiometry

nNH3/2=nH2/3

0.25/2=nH2/3

nH2=0.25×3/2

nH2=0.375 mol

so its 0.38 mol

6 0
3 years ago
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I do not have a question anymore
IrinaK [193]

Answer:

I dont have a answer

Explanation:

4 0
3 years ago
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