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3 years ago

6

What causes a water strider to be able to walk on water?

2 answers:

Lena [83]3 years ago

8 0

Answer:

By repelling water, the tiny water striders stand on the water's surface and the captured airs allows them to float and move easily. so number 2. Surface Tension.

Explanation:

The attraction between water molecules creates tension and a very delicate membrane. Water striders walk on this membrane. ... The legs have tiny hairs that repel water and capture air.

Nina [5.8K]3 years ago

4 0

Answer:

Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water.

Hope this helps! (:

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What is the volume of 120 x 1022 molecules of nitric oxide gas, NO, at si B) 2.24L C) 0.0199 L D) 5.02 A) 1120 L

Allisa [31]

Answer: 44.8 L

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atm respectively.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadro's number}}=\frac{120\times 10^{22}}{6.023\times 10^{23}}=2moles$

1 mole of $NO$ occupies volume = 22.4L at STP

Thus 2 moles of magnesium react with= $\frac{22.4}{1}\times 2=44.8L$

Thus the volume of $120\times 10^{22}$ molecules of nitric oxide gas is 44.8 L.

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2 years ago

A forest has a stable population of approximately 100 great horned owls. The owls nest in hollow trees, eat small animals, and h

CaHeK987 [17]

The answer is B. The carrying capacity will decrease, forcing the population to decrease as well.

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3 years ago

Read 2 more answers

What does geocentric mean

motikmotik

Answer:

Relating to, measured from, or as if observed from the earth's center.

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2 years ago

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The kilogram is the standard unit of

Sati [7]

Answer:

The kilogram is the standard unit of mass.

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3 years ago

The radius of an indium atom is 0.163 nm. If indium crystallizes in a face-centered unit cell, what is the length of an edge of

adoni [48]

<u>Answer:</u> The edge length of the unit cell is 0.461 nm

<u>Explanation:</u>

We are given:

Atomic radius of iridium = 0.163 nm

To calculate the edge length, we use the relation between the radius and edge length for FCC lattice:

$a=2\sqrt{2}R$

Putting values in above equation, we get:

$a=2\sqrt{2}\times 0.163=0.461nm$

Hence, the edge length of the unit cell is 0.461 nm

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2 years ago