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MrRissso [65]
3 years ago
7

How does dry ice shrink in size

Chemistry
2 answers:
yanalaym [24]3 years ago
8 0
Sublimation takes place when an element or compound changes directly from a solid into a gas without passing through the liquid state....

this is what i found i do not know much about dry ice but i hope this helps you!!!
http://askville.amazon.com/ice-unused-freezer-shrink-time/AnswerViewer.do?requestId=2377877
this is the website i found this little information from i hope this helps you out


klemol [59]3 years ago
5 0
Dry ice, or solid carbon dioxide, sublimates under our normal sea level temperature and pressure, (due to some rather complicated triple point pressure curves and temperature curves and stuff) so as it sublimates, it loses mass.
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How many atoms of hydrogen are present in 2.92 g of water?
Wittaler [7]
The molecular weight of water is <span>18.01528 g/mol.
So in 2.92 grams there are 2.92/</span>18.01528 = 0.1621 mol of particles.

1 mol contains 6,02214 × 10^<span>23 particles by definition.

So the nr of H2O molecules is </span>0.1621 * 6,02214 × 10^23 = 0,9761 × 10^23.

Every molecule has 2 H atoms, so you have to double that.

2* 0,9761 × 10^23 = 1.952 × 10^23.
3 0
3 years ago
Read 2 more answers
A 1.450 g sample of an unknown organic compound , X, is dissolved in 15.0 g of toluene
muminat

Answer:

Molecular weight of the compound = 372.13 g/mol

Explanation:

Depression in freezing point is related with molality of the solution as:

\Delta T_f = K_f \times m

Where,

\Delta T_f = Depression in freezing point

K_f = Molal depression constant

m = Molality

\Delta T_f = K_f \times m

1.33 = 5.12 \times m

m = 0.26

Molality = \frac{Moles\ of\ solute}{Mass\ of\ solvent\ in\ kg}

Mass of solvent (toluene) = 15.0 g = 0.015 kg

0.26 = \frac{Mole\ of\ compound}{0.015}

Moles of compound = 0.015 × 0.26 = 0.00389 mol

Mol = \frac{Mass\ in\ g}{Molecular\ weight}

Mass of the compound = 1.450 g

Molecular\ weight = \frac{Mass\ in\ g}{Moles}

Molecular weight = \frac{1.450}{0.00389} = 372.13\ g/mol

4 0
3 years ago
Zinc has a density of 7.10 g/cm3. If a cylinder of zinc weighing 46.77 g is completely immersed in a graduated cylinder that ori
scoundrel [369]
Zinc density = 7.10 = 46.77/x ==> x = 46.77/7.10 =6.6 cm3 or 6.6 ml
New water level = 33.33+ 6.6 = 39.93 ml
Can you mark it brainliest if my answer is correct?
4 0
3 years ago
Which temperature is warmest<br>A. 0°C<br>B. 273 K<br>C. 32°F<br>D. 30°C​
kakasveta [241]
I think your answer will be B. 273 k
7 0
3 years ago
Read 2 more answers
What is the reduction half-reaction for the reaction of zinc with hydrochloric acid?
german
2HCl (aq) + Zn²⁺   ⇒  ZnCl₂  + 2H⁺         Total Reaction 
    
Leo goes Ger (Lose electron oxidize, Gain electron reduction)

Zn²⁺ + 2e⁻  ⇒ Zn     Oxidation half-reaction 

2H ⇒ 2H⁺ + 2e⁻       Reduction half-reaction                      
6 0
3 years ago
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