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3 years ago

Which is stronger, a glass bottle or a glass candlestick?

Chemistry

2 answers:

Katyanochek1 [597]3 years ago

4 0

A glass candlestick is stronger because the makers let alone use stronger glass but also it is thicker.

liberstina [14]3 years ago

3 0

I think A glass bottle

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Calculate the mass percent of oxygen in CO2 (Work shown)

Genrish500 [490]

Answer:

$mass \: of \: CO _{2} = (12 + (16 \times 2)) = 44 \: g \\ mass \: of \: oxygen \: in \: CO _{2} = (16 \times 2) = 32 \\ \% \: of \: oxygen = \frac{32}{44} \times 100\% \\ = 72.7\%$

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2 years ago

Which mixture can be separated based on differences in the particle size of the components?

Rina8888 [55]

Answer: Mixtures you can separate are like cereal and milk. Hope that helps

Explanation: Filteration is required to separate a mixture.

So heterogeneous mixures (that contain substances with different particle sizes) can be separated with a filter.

Homogeneous mixtures are uniform in composition so they will not be able to be separated.

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3 years ago

Write balance complete molecular equation, ionic equation, and net ionic equations for the reactions that occur when each of the

AveGali [126]

Answer: The complete molecular, ionic, and net ionic equations are given below. The spectator ions are sodium and nitrate ions.

Explanation:

The ionic equation is defined as the equation in which all the substances that are strong electrolytes present in an aqueous state and are represented in the form of ions.

The net ionic equation is defined as the equations in which spectator ions are not included.

Spectator ions are the ones that are present equally on the reactant and product sides. They do not participate in the reaction.

The balanced molecular equation for the reaction of lead (II) nitrate and sodium sulfide follows:

$Pb(NO_3)_2(aq)+Na_2S(aq)\rightarrow PbS(s)+2NaNO_3(s)$

The ionic equation follows:

$Pb^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+S^{2-}(aq)\rightarrow PbS(s)+2Na^+(aq)+2NO_3^-(aq)$

As sodium and nitrate ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

$Pb^{2+}(aq)+S^{2-}(aq)\rightarrow PbS(s)$

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3 years ago

Whats The amount of space an object takes up is known as the objects?

Ray Of Light [21]

The amount of space would be consider matter

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3 years ago

How many molecules of ethanol (c2h5oh) (the alcohol in alcoholic beverages) are present in 155 ml of ethanol? the density of eth

ozzi

First convert volume to mass:

mass = 0.789 g/mL * 155 mL = 122.295 g

Then convert mass to number of moles:

number of moles = 122.295 g * (1 mole / 46 g) = 2.66 moles

Using avogadros number, we get the molecules:

number of molecules = 2.66 moles * 6.022 x 10^23 molecules / mole = 1.6 x 10^24 molecules

4 0

3 years ago