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Katena32 [7]
4 years ago
11

The statement “traits are passed from parents to offspring independently of one another” is ?

Chemistry
1 answer:
vampirchik [111]4 years ago
6 0
Heredity maybe? im not really sure, thats all i could think of
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At what temperature will water freeze if 100g NaCl are dissolved in 500g H2O?
Montano1993 [528]

Answer : The temperature at which water freeze will be, -12.7^oC

Explanation :  Given,

Molal-freezing-point-depression constant (K_f) for water = 1.86^oC/m

Mass of NaCl (solute) = 100 g

Mass of water (solvent) = 500 g  = 0.500 kg

Molar mass of NaCl = 58.5 g/mole

Formula used :  

\Delta T_f=i\times K_f\times m\\\\T^o-T_s=i\times K_f\times\frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}\times \text{Mass of water in Kg}}

where,

\Delta T_f = change in freezing point

\Delta T_s = freezing point of solution = ?

\Delta T^o = freezing point of water = 0^oC

i = Van't Hoff factor = 2  (for NaCl electrolyte)

K_f = freezing point constant for water = 1.86^oC/m

m = molality

Now put all the given values in this formula, we get

0^oC-T_s=2\times (1.86^oC/m)\times \frac{100g}{58.5g/mol\times 0.500kg}

T_s=-12.7^oC

Therefore, the temperature at which water freeze will be, -12.7^oC

8 0
3 years ago
Na and ci are chemical ( symbols,formulas).
lozanna [386]
I believe they are chemical symbols. You can find them on the periodic table. 
6 0
4 years ago
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How do erosion and deposition play a part in the formation of stalactites and stalagmites found in Natural Bridge Caverns?
Nonamiya [84]
I didn’t learn about this but I do know erosion can make big cracks in your yard and the cracks can be so big that u can’t put your whole legs in there
7 0
3 years ago
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An 8.24 gram sample of a hydrated salt is heated until it has a constant mass of 6.20 grams. What was the percent by mass of wat
Iteru [2.4K]

Answer:

32.9%

Explanation:

<u>The mass of water </u>present in the original sample can be calculated by the substraction:

  • m H₂O = sample mass before heating - sample mass after heating
  • m H₂O = 8.24 g - 6.20 g = 2.04 g

The <u>percent by mass of water</u> can be calculated with the formula:

  • Water Mass / Original Sample Mass * 100 %
  • \frac{2.04}{6.20} * 100% = 32.9%
3 0
3 years ago
How do you separate rice grains that have accidentally mixed with flour
Harlamova29_29 [7]
You can use a sieve, aka a sifter, to separate the rice grains from the flour
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