HNO3 is an Arrhenius ____ and increases the concentration of when added to water.

1 answer:

4 0

HNO3 and H2SO4 are Arrhenius acids which will increase the concentration of H+ when dissolved in water.

KOH and Ca(OH)2 are Arrhenius bases that increase the concentration of OH- when dissociated in water.

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12. A helium-filled weather balloon has a volume of 2.4 x 102 L at 99 kPa pressure and a

Luba_88 [7]

Answer:

The answer to your question is 8.74 g of He

Explanation:

Data

V = 2.4 x 10² L

P = 99 kPa

T = 0°C

mass = ?

Process

1.- Convert kPa to atm

P = 99 kPa = 99000 Pa

1 atm --------------- 101325 Pa

x --------------- 99000 Pa

x = (99000 x 1) / 101325

x = 0.977 atm

2.- Convert temperature to °K

°K = 273 + 0

°K = 273

3.- Substitution

PV = nRT

- Solve for n

n = PV / RT

n = (0.977)(2.4 x 10²) / (0.082)(273)

n = 24.48 / 22.386

n = 1.093 moles

4.- Calculate the grams of He

8 g -------------------- 1 mol

x -------------------- 1.093 moles

x = (1.093 x 8) / 1

x = 8.74 g

6 0

3 years ago

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PLEASE HELP ME.!

Karo-lina-s [1.5K]

Answer:

Anaphase II

Explanation:

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3 years ago

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Complete combustion of 5.90 g of a hydrocarbon produced 19.2 g of CO2 and 5.89 g of H2O. What is the empirical formula for the h

scZoUnD [109]

$44g \ CO_{2} \ \ \ \rightarrow \ \ 12g \ C\\
19,2g \ CO_{2} \rightarrow \ \ \ x\\\\
x=\frac{19,2g*12g}{44g}\approx5,24g \ \ \ \Rightarrow \ \ n=\frac{5,24g}{12\frac{g}{mol}}\approx0,44mol\\\\\\
18g \ H_{2}O \ \ \ \rightarrow \ \ \ 2g \ H\\
5,89g \ H_{2}O \ \rightarrow \ \ y\\\\
y=\frac{5,89g*2g}{18g}\approx0,65g \ \ \ \ \Rightarrow \ \ n=\frac{0,65g}{1\frac{g}{mol}}=0,65mol\\\\\\
n_{C}:n_{H}=0,44:0,65\approx1:1\\\\
CH$