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3 years ago

Why potasium more reactive than lithium and sodium

1 answer:

5 0

So potassium is more reactive than lithium because the outer electron of a potassium atom is further from its nucleus than the outer electron of a lithium atom. Hope this answers the question. Have a nice day. Feel free to ask more questions.

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How is the weathering of rocks by water different from the weathering of rocks by ice?

andrey2020 [161]

Answer:

It is because water is liquid and it can be weathered easily. While weathering by solid is a bit dangerous because of its hardness.

Explanation:

4 0

2 years ago

.266 mol CO plus .524 Mol H2 gives how many moles of CH3OH

Readme [11.4K]

Explanation:

Carbon monoxide and hydrogen gas reacts together to form methanol:

CO + 2H2 => CH3OH

Since 0.266mol * 2 = 0.532mol > 0.524mol, the limiting reactant here is hydrogen and therefore there will be 0.524mol / 2 = 0.262mol of methanol.

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3 years ago

Why do A and T (and G and C) pair in a DNA double helix?

Usimov [2.4K]

I just took a quiz on this! It's D!

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3 years ago

1. A sample of polystyrene is found to have a number-average molar mass of 89,440 g mol−1 . Neglecting contributions from end gr

Snowcat [4.5K]

Answer:

The weight-average molar mass of polystyrene is 134,160 g/mol.

Explanation:

Molar mass of the monomer styrene , $C_8H_8$ , M=104 g/mol

Given , number average molar mass of the polymer , M'= 89,440 g/mol

Degree of polymerization = n

$n=\frac{M'}{M}=\frac{89,440 g/mol}{104 g/mol}=860$

The weight-average molar mass = $M_{avg}=?$

Molar mass dispersity is ratio of weight-average molar mass to the number average molar mass of the polymer.

$\text{Molar mass dispersity}=\frac{M_{avg}}{M'}$

$1.5=\frac{M_{avg}}{89,440 g/mol}$

$M_{avg}=89,440 g/mol\times 1.5 = 134,160 g/mol$

The weight-average molar mass of polystyrene is 134,160 g/mol.

8 0

3 years ago

Which is a property of water

Paha777 [63]

Answer:

A liquid I think

Explanation:

6 0

3 years ago