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Lunna [17]
3 years ago
8

A group of students is setting up a test to see whether earthworms, like those shown in the photo, prefer rough or smooth surfac

es
Chemistry
1 answer:
kotykmax [81]3 years ago
8 0

Answer:

they like smooth

Explanation:

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During diffusion which way do the substances move?
ser-zykov [4K]
During diffusion substances move from the denser medium (meaning where there is more of the substance) to less dense medium (meaning where there is less of the substance).


3 0
4 years ago
How is the mole of a used to express the mass of a substance explain​
diamong [38]

Answer:

See explanation

Explanation:

The mole refers to the amount of substance contained in 12 g of carbon-12. It was arbitrarily related to the number of elementary entities in 12 g of carbon -12 by Prof. Avogadro.

The number of moles of a substance is obtained as the mass of the substance divided by the mass of one mole of the substance (molar mass). Hence when the number of moles is known, the mass is now;

number of moles * molar mass

8 0
3 years ago
The mass of an object is 13.76 g. the volume of the object is 2.83 ml. what is the density of the object to the correct number o
Firlakuza [10]

Answer:

D ≈ 4.86 g/mL

Explanation:

Density = Mass over Volume

D = m/V

Step 1: Define variables

m = 13.76 g

V = 2.83 mL

D = unknown

Step 2: Substitute and Evaluate for Density

D = 13.76 g/2.83 mL

D = 4.8621908127208480565371024734982 g/mL

Step 3: Simplify

We are given 3 sig figs.

4.8621908127208480565371024734982 g/mL ≈ 4.86 g/mL

7 0
3 years ago
A chef is testing out a new set of iron cookware. He knows that iron has a specific heat of 445 J/kg°C. He heats a 2 kg iron ski
Musya8 [376]

Answer:

yo whats good nebyu its nathan Imao

Explanation:

5 0
3 years ago
Which of the following statements best describes what happens to water during vaporization?
ss7ja [257]

Answer: im pretty sure its D

Explanation:

8 0
4 years ago
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