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adelina 88 [10]
3 years ago
15

Which unit can be used to express the rate of a reaction?

Chemistry
1 answer:
baherus [9]3 years ago
6 0
It is moldm^-3s^-1
^ means raise to power

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The pH of a solution is 2.0. Which statement is correct?
mamaluj [8]

Answer:

pH + pOH = 14,  [H₃0⁺] [0H⁻] = 10⁻¹⁴

Explanation:

When it comes to questions involving pH, the equations used are;

[H₃0⁺] [0H⁻] = 10⁻¹⁴

This equation shows the concentration of hydroxonium ions alongside that of the hydroxide ions.

pH + pOH = 14

If the value of either the pH of the pOH is know,one can calculate the value of the other using this equation.

4 0
3 years ago
How many Grams would he present if 1 mole sample of sodium were collected?
Zigmanuir [339]
Mass = moles x Mr
So in this case the moles =1
And the Mr equals =11
So you would do - 11x1= 11grams
8 0
3 years ago
A certain solid substance, that is very hard, has a high melting point and is nonconducting unless melted is most likely to be:A
svetlana [45]

Answer: B) KCl

Explanation:

It is an odourless gas with a melting point of of 770°c and a boiling point of about 1420°c, it exists in a white crystalline solid form. KCl is highly water soluble and also soluble in other variety of polar solvent but insoluble in many organic solvents.

7 0
3 years ago
How much of each gas is there in 100cm3 air?
Akimi4 [234]
Each 100 cm3 of air, constitutes 78cm3 nitrogen, 21cm3 oxygen and 1cm3 constitutes of other gases like Argon, ozone, carbon dioxide and water vapour in small amounts.
8 0
3 years ago
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Which set of values represents standard pressure and standard temperature?(1) 1 atm and 101.3 K(2) 1 kPa and 273 K(3) 101.3 kPa
yuradex [85]
Standard Temperature and Pressure (STP) is 0 degree Celsius and 1 atm. We also know that 1atm= 101.3 kPa. Thus, set 3 is the best choice.
Hope that would help :))
4 0
3 years ago
Read 2 more answers
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