3 years ago

What attractive force holds two hydrogen atoms and one oxygen atom

Chemistry

1 answer:

gayaneshka [121]3 years ago

8 0

Answer:

It is a hydrogen bond but if I had to coose one of thee answers it is b. chemical bonding

Explanation:

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in an experiment magnesium ribbon was heated in air the product formed was found heavier than original ribbon.potassium manganat

AlladinOne [14]

Answer:

1: due to difference in reactivity and melting point

2 during the reaction both combine with oxygen in this case magnesium remain solid but some potassium vaporise

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3 years ago

What kind of questions can science answer

IrinaK [193]

Answer:

hypothesis

Explanation:

a question that can be answered wity a hypothesis is a question a scientist can answer

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3 years ago

How many moles of NaCl are needed to make 10.0L of a 5 M solution of<br> Salt water?*

vesna_86 [32]

Answer: 50 mol

Explanation:

$Molarity=\frac{Moles -of -solute}{liters -of -solution}$

$M=\frac{mol}{L}$

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3 years ago

Balance this equation. Pb(NO3)2(aq)+NaCl(aq) -> NaNO3(aq)+PbCl2(s)

const2013 [10]

Answer:

Pb(NO3)2(aq) + 2NaCl(aq) -> 2NaNO3(aq)+PbCl2(s)

Explanation:

Pb(NO3)2(aq)+NaCl(aq) -> NaNO3(aq)+PbCl2(s)

This is how it starts out.

Left:

2 NO3s
1 Pb
1 Na
1 Cl

Right

1 Na
1 NO3
1 Pb
2 Cl

So the place to start with this equation is to bring the Cls up to 2

Pb(NO3)2(aq)+2NaCl(aq) -> NaNO3(aq)+PbCl2(s)

But the Nas are now out of kilter.

Pb(NO3)2(aq)+ 2NaCl(aq) -> NaNO3(aq)+PbCl2(s)

Now the right has a problem. There's only 1 Na

Pb(NO3)2(aq) + 2 NaCl(aq) -> 2NaNO3(aq)+PbCl2(s)

Check it out. It looks like we are done.

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2 years ago

An element has an atomic number of 80. How many protons and electrons are in an atom of the element?

Nadya [2.5K]

80 protons,121 Neutrons, and 80 electrons the element is Mercury

6 0

3 years ago