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Vlad [161]
3 years ago
10

All are types of chemical reactions except __________. A) decomposition reactions B) synthetic reactions C) single replacement r

eactions
Chemistry
1 answer:
Morgarella [4.7K]3 years ago
8 0
B) synthetic reactions. There is no such thing as "synthetic reactions" but synthesis reactions.
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WILL GIVE BRAINLIEST!!!
Hoochie [10]
Hey there!:

ΔTf = Kf * m

Molar mass glucose = 180 g/mol

number of moles glucose:

n = mass of solute / molar mass

n = 21.5 / 180

n = 0.119 moles glucose

Amount of solvent in kg = 255/1000 = 0.255 Kg

Molality = number of moles / solvent

m = 0.119 / 0.255

m = 0.466 moles/kg

Kf for water = - 1.86 ºC/*m

Therefore:

ΔTf = Kf * m

ΔTf = (-1,86) * 0.466

ΔTf = -0.86676 ºC

hope this helps!
7 0
3 years ago
Read 2 more answers
Determine the density of chunk of lead that has a mass of 1055 grams and a volume of 93.4 cm^3
Bad White [126]
  • Mass=0155g
  • Volume=93.4cm^3

\\ \tt\longmapsto Density=\dfrac{Mass}{Volume}

\\ \tt\longmapsto Density=\dfrac{1055}{93.4}

\\ \tt\longmapsto Density=11.29g/cm^3

7 0
2 years ago
How many moles of gas are present when you collect 35.83 mL of the gas over water at 25.3°C and 0.97 atm?
Oksana_A [137]
Use Ideal Gas equation since values are given in Pressure (P), Volume (V), Temperature (T). 
                                 P V = n R T ; n= PV / RT
You can't use 1 mole= 22.4 L equation. Temperature and pressure values are not standard. ( 1 atm, 0 

To choose the value of R ( gas constant), check out the units of other values in the equation. They are in atm,liter, kelvin, and mole.  So, its value is 0.082 L atm/ K mol.

P= 0.97 atm
V= 35.83 * 10 ⁻³ L (conversion from ml to,  just multiplied by 10 ⁻³ )
R= 0.082 L atm/ K mol
T= (25.3 + 273) K ( recall Kelvin = Celcius + 273; K= °C + 273<span>)
</span>
Substitute values into equation of  n= PV / RT

n= 
(0.97 atm) (35.83 * 10 ⁻³ L) /  (0.082 L atm/ K mol) (298.3 K)= 0.014 mole

The answer is 0.014 mole
3 0
2 years ago
Read 2 more answers
There is 321 grams of H2SO4, how many molecules is this?
Ivenika [448]

Answer:

The original number of oxygen atoms was about 80 times larger than Avogadro's number. Since each sulfuric acid molecule contains 4 oxygen atoms, there are about 20 moles of sulfuric acid molecules.

3 0
2 years ago
Name the following compounds and classify them as ionic or covalent.
katrin2010 [14]
A-copper chromate oxide ionic I think
B-barium nitrate ionic
C-chlorine monoxide ionic
D- Bromine pentafluoride covalent
6 0
2 years ago
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