3 years ago

When do Polar Covalent Bonds form

1 answer:

3 0

A polar covalent bond forms when the shared pair of electrons are more attracted to one atom than the other.This is due to the electronegativity difference between them.

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I need to find the chemical equation

Yuri [45]

Answer:

2NaCN + CaCO3 --> Na2CO3 + Ca(CN)2

Explanation:

Knowing the names gets us: NaCN + CaCO3 --> Na2CO3 + Ca(CN)2

Balance: there are two sodiums and cyanides on the product side so add a 2 to the reactant side.

4 0

3 years ago

An elevator is rising at a constant speed. What forces are acting on the elevator? A. normal, gravity and tension B.gravity and

yKpoI14uk [10]

I would say B I hope this helps

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3 years ago

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What do you think happens to the bonds between atoms when substances melt?

Eduardwww [97]

Answer:

As a substance melts, and goes from a solid to a liquid state, the kinetic energy of the molecules increases, and the molecules move faster, and they separate further and further away from each other. The intermolecluar forces holding the molecules together become weaker. This is why a liquid can take fill the shape of its container, whereas a solid has a fixed shape.

Explanation:

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6 0

3 years ago

How many grams are in 4.5 moles of chlorine gas (Cl2)?

k0ka [10]

Answer:

no of moles=mass in gm÷molar mass so let x be the mass in gm

4.5=x÷35.5×2

x=4.5×35.5×2 grams

x=319.5 gm

Explanation:

formula

6 0

3 years ago

before the quarry was dug, the land contained more vegetation . what impact has this change most likely had on the local ecosyst

Sergio039 [100]

It was loss of nutrients, I think

Explanation:

The quarry was dug up and vegetation started dying. The quarry was probably rich with nutrients

Please brainliest !! ❤️

5 0

3 years ago