3 years ago

Help please.

Chemistry

1 answer:

ANTONII [103]3 years ago

7 0

It is D: a spinning cloud of dust...

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If more solute can be dissolved in a solvent, the solution is

monitta

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A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved. At 20°C, the maximum amount of NaCl that will dissolve in 100. g of water is 36.0 g.

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Predict how many antacid tablets it would take to produce 120 mL of CO2 gas

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It would take 8 antacid tablets to produce 120 mL of CO2 gas.

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A gas temperature of 14 C and a volume of 4.5L. If the temperature is raised ot 29 C and the pressure is not changed, what is th

zhenek [66]

T1 = 14⁰C = 273 +14= 287 K
T1 = 29⁰C =273 +29 = 302 K
V1 = 4.5 L
P = constant

T1/T2 = V1/V2
287/302 = 4.5/V2

V2= 302*4.5/287 = 4.7L
V2 = 4.7 L

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3 years ago

Please answer ASAP I’ll give the brainliest!

lilavasa [31]

1. 1 mol=6.02.10²³ particles

$\tt \dfrac{3.63\times 10^{23}}{6.02\times 10^{23}}=0.602~moles$

2. Molar mass = Total atomic mass of component

AlBr₃ = Ar Al + 3. Ar Br

AlBr₃ = 27 + 3. 80 = 267 g/mol

3. mass = mol x MW

MW MnCl₂ = 55 + 2.35.5=126 g/mol

mass = 31.6 x 126 =3981.6 g

4. at STP, 1 mol =22.4 L, so for 5.6 L :

$\tt \dfrac{5.6}{22.4}=0.25~moles$

5. moles = mass : MW

MW CH₃OH = 12.1 + 4. 1 + 16.1 =32 g/mol

$\tt moles=\dfrac{0.5}{32}=0.016$

6. 1 mol = 22.4 L at STP

1 mol = 6.02.10²³ particles

moles for 8.20 x 10¹⁴ molecules

$\tt \dfrac{8.2\times 10^{14}}{6.02\times 10^{23}}=1.36\times 10^{-9}$

volume :

$\tt 1.36\times 10^{-19}\times 22.4=3.05\times 10^{-8}~L$

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3 years ago

What part of an atom is responsible for combing the atoms together (bonding) to form a new substance?

Bezzdna [24]

Electrons they bond to form pairs

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