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aliya0001 [1]
3 years ago
9

What mass of naoh (40.0 g/mol) is needed to prepare 250 ml of 2 m naoh solution?

Chemistry
1 answer:
laila [671]3 years ago
6 0
20 grams  is probably the mass
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Witch organism is primary consumers?<br><br> O krill<br> O elephant seal<br> O squid<br> O penguins
satela [25.4K]

Answer is A. Krill

hope this will help you

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3 years ago
3<br> Convert 5.492 x 104 grams to units of micrograms.<br> (Click to select 4<br> x 10<br> ug
Soloha48 [4]

Answer:

5.492*10^10

Explanation:

1g=1000000microgram

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Gas is $2.50/gal at Station A and 85 cents/L at Station B. A) Convert the cost of gas at Station B to $/gal. B) At which station
SVETLANKA909090 [29]

Answer:

85 cents/L is equal to 3.2176$/gallon.

gas wiuld be heaper to buy from the station A.

Explanation:

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8 0
3 years ago
Which statement describes the periodic table?
Nutka1998 [239]
Periodic table is a scientific model
6 0
3 years ago
Read 2 more answers
The equation for photon energy, E, is E=hcλ where h = 6.626×10−34 J⋅s (Planck's constant) and c = 2.99×108 m/s (the speed of lig
masya89 [10]

Answer:

9.133×10^-6 m

Explanation:

A photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light. Photons are always in motion and, in a vacuum, travel at a constant speed to all observers of 3 x 10^8 m/s.

From the question, the following details were supplied;

Energy of the photon (E) = 4.61×10^−19 J

Speed of light (c) = 2.99×10^8 m/s

Plank's constant (h) = 6.626×10^−34 J⋅s

Wavelength of the photon (λ)= ??? The unknown

From

E=hc/λ

λ= hc/E

Substituting values

λ= 6.626×10^−34 × 2.99×10^8/ 4.61×10^−19

λ= 91.33×10^-7 m

λ= 9.133×10^-6 m

3 0
3 years ago
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