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MArishka [77]
3 years ago
11

I NEED ASAP!!! Which is an example of matter, the sound of thunder, sunlight, heat from a oven, or smoke from a fire?

Biology
2 answers:
juin [17]3 years ago
8 0
Definitely D because none of the other answers even make sense lol
Grace [21]3 years ago
5 0

Answer:

D. Smoke from a fire

Explanation:

Smoke from a fire is the correct answer because it is made up of physical atoms. Sounds, light, and temperature are not made of atoms and are thus not matter.

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Que significa formulacion de frutas
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Answer:

Fruit in formulations allows unparalleled versatility, functioning as either a main ingredient, an inclusion, a flavorant, or as a healthful sweetener.

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3 years ago
How would you make 2.5 liters of an aqueous solution containing 150mM Tris (the MW of Tris is 120g/mole)? (Hint: Do the necessar
lisabon 2012 [21]

Answer:

45 g of the solid Tris will be dissolved in 2.5 liters of water.

Explanation:

Recall that:

<em>Number of moles  = molarity x volume</em>

Hence, number of moles of Tris present in 2.5 liters, 150 mM solution:

= 150/1000 x 2.5 = 0.375 moles

Also, recall that:

<em>No of moles of substance = mass/molar mass.</em>

Hence, mass of 0.375 moles substance:

= no of moles of the substance x molar mass of the substance.

= 0.375 x 120 = 45 g.

Therefore, in order to prepare 2.5 liters, 150 mM of an aqueous solution of Tris, 45 g of the solid Tris will be dissolved in 2.5 liters of water.

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Independent Variable: Time each plant is exposed to daylight.

Dependent Variable: Hours of exposure

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