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3 years ago

Help please !!!

1 answer:

7 0

The ball slowed down faster than the floor because the carpet has more friction than the floor. The carpet isn’t smooth but the floor is.

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How do the conditions for hurricane differ from the conditions for tornado?

stepladder [879]

Answer:

The conditions for hurricanes differ from the conditions of tornadoes because of D, Tornadoes form over land, while hurricanes form over bodies of water.

Explanation:

Hurricanes form over warm water in tropical ocean settings and tornadoes form over land within storms.

8 0

3 years ago

What is the most accurate sight for a firearm?

Bess [88]

Answer:

a magnifying scope

Explanation: you get a close up view of the target and because of that there is a lower margin of error

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3 years ago

A gas mixture contains 1.61 moles of hydrogen and 2.31 moles of oxygen. What is the mole fraction of oxygen?

agasfer [191]

Answer: option B. 0.59

Explanation:Please see attachment for explanation

5 0

3 years ago

Draw the best Lewis structure for NH3 by filling in the bonds, lone pairs, and formal charges. (Assign bonds, lone pairs, radica

kiruha [24]

Answer : The Lewis-dot structure of $NH_3$ is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $NH_3$

As we know that hydrogen has '1' valence electron and nitrogen has '5' valence electrons.

Therefore, the total number of valence electrons in $NH_3$ = 5 + 3(1) = 8

According to Lewis-dot structure, there are 6 number of bonding electrons and 2 number of non-bonding electrons.

Now we have to determine the formal charge for each atom.

Formula for formal charge :

$\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}$

$\text{Formal charge on N}=5-2-\frac{6}{2}=0$

$\text{Formal charge on }H_1=1-0-\frac{2}{2}=0$

$\text{Formal charge on }H_2=1-0-\frac{2}{2}=0$

$\text{Formal charge on }H_3=1-0-\frac{2}{2}=0$

Hence, the Lewis-dot structure of $NH_3$ is shown below.

3 0

3 years ago

PLEASE HELP!!

LUCKY_DIMON [66]

Answer:

$5.1 - 2.3685 = 2.7315 \\$

3 0

2 years ago