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4 years ago

Why do planets in our solar system stay in their positions

Chemistry

2 answers:

Anon25 [30]4 years ago

4 0

This is not chemistry but it's A, off top.

xz_007 [3.2K]4 years ago

3 0

The sun's gravity keeps them in place.

Have a fabulous day <3

<em>~Animaljamissofab ♥</em>

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A4 g sugar cube (Sucrose : C 12 H 22 O 11 ) is dissolved in a 350 ml teacup of 80 C water. What is the percent composition by ma

lana66690 [7]

Answer:

%Sgr = 1% (1 sig.fig.)

Explanation:

mass water = 350ml x 0.975g/ml = 341.25g

mass sugar added = 4g

solution mass = 341.25g + 4g = 345.25g

%sugar = (4g/345.25g)·100% = 1.1586% ≅ 1% (1 sig.fig)

7 0

3 years ago

How many molecules of water of water are in a 821.3 g sample

svetlana [45]

Answer: 2.744 x 1025 molecules

6 0

3 years ago

How are periods and groups different from each other?.

Bingel [31]

Answer:

Period and groups are different because

PERIODS are the number of shells

I.e in lame man words the no of circles when drawn an element

GROUPS : these are the number of electrons in the outermost shell

Groups determine the valency*

4 0

2 years ago

I WILL GIVE BRAINLIEST!!!!!!!!!!

oksano4ka [1.4K]

Hello.

<span>HI + NaOH --> NaI + H2O

2HClO4 + Sr(OH)2 --> Sr(ClO4)2 + 2H2O
</span>
Have a nice day

7 0

4 years ago

How many moles of nitrate are dissolved in water if 6.15 mole strontium nitrate dissolve?

pashok25 [27]

The number of moles of nitrate dissolved in water if 6.15 mole of strontium nitrate is : 12.3 moles

<u>Given data :</u>

Moles of strontium nitrate = 6.15 moles

<h3>Ionization of Strontium Nitrate </h3>

When strontium nitrate ( $Sr(NO_{3} )_{2}$ ) is placed in water it will dissociates into its ions because strontium nitrate is an ionic compound.

Next step : Represent the ionization of strontium nitrate

$Sr ( NO_{3} )_{2} (aq) --- > Sr^{2+} (aq) + 2NO_{3} ^{-} (aq)$

From the Stoichiometry of the chemical reaction

I mole of strontium nitrate = 2 moles of Nitrate ions

6.15 mole of strontium nitrate = 2 * 6.15

= 12.3 moles of Nitrate

Hence we can conclude that The number of moles of nitrate dissolved in water if 6.15 mole of strontium nitrate is : 12.3 moles.

Learn more about Stoichiometry of chemical reaction : brainly.com/question/27058367

3 0

3 years ago