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3 years ago

Which of these substances is acidic? Baking soda Water Lemon Floor cleaner

Chemistry

2 answers:

11Alexandr11 [23.1K]3 years ago

3 0

Answer:

Lemon

Explanation:

alina1380 [7]3 years ago

3 0

Answer:

Backing soda is not acidic

Water is not acidic

Lemon is acidic since it contains citric acid

Floor cleaner can be acidic depending on its amount of cleaning chemicals.

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Solutions of hydrogen in palladium may be formed by exposing Pd metal to H gas. The concentration of hydrogen in the palladium d

Juliette [100K]

Explanation:

Mass of solution , m= 0.94 g + 215 g = 215.94 g

Volume of the solution = V

Density of solution = d = $10.8 g/cm^3$

$V=\frac{m}{d}=\frac{215.94 g}{10.8 g/cm^3}=19.99 cm^3=19.99 mL$

$1 cm^3=1 mL$

$1 mL=0.001 L$

$V=0.01999 L$

Moles of hydrogen = $\frac{0.94 g}{2 g/mol}=0.47 mol$

Molarity of hydrogen gas:

$Molarity=\frac{Moles}{\text{Volume of solution (L)}}$

$=\frac{0.47 mol}{0.01999 L}=0.02351 mol/L$

Molality of hydrogen gas :

Mass of solvent or here it is palladium = 215 g =0.215 kg (1 g = 0.001 kg)

$Molality=\frac{Moles}{\text{Mass of solvent(kg)}}$

$=\frac{0.47}{0.215 kg}=2.1860 mol/kg$

Mass percentage of hydrogen is solution :

$\frac{\text{Mass of hydrogen}}{\text{Mass of solution}}\times 100$

$=\frac{0.94 g}{215.94 g}\times 100=0.435\%$

5 0

4 years ago

What is the wavelength of spectral line resulted from the electron transition from n=3 to n=2 in a hydrogen atom.

MakcuM [25]

Answer:

$\lambda=6.56x10^{-7}m$

Explanation:

Hello there!

In this case, it possible to use the Rydberg equation in order to calculate the wavelength for this transition from n=3 to n=2 as shown below:

$\frac{1}{\lambda} =R_H(\frac{1}{n_f^2}-\frac{1}{n_i^2} )$

Thus, we plug in the corresponding energy levels and the Rydberg constant to obtain:

$\frac{1}{\lambda} =10973731.6m^{-1}(\frac{1}{2^2}-\frac{1}{3^2} )\\\\\frac{1}{\lambda} =1524129.4m^{-1}\\\\\lambda=\frac{1}{1524129.4m^{-1}} \\\\\lambda=6.56x10^{-7}m$

Best regards!

5 0

3 years ago

Hydrocarbons that lack ____________ are called saturated hydrocarbons, or ___________.

Nady [450]

Hydrocarbons that lack π bond are called saturated hydrocarbons or alkanes

<h3>Hydrocarbons</h3>

Hydrocarbon is an organic compound consisting of hydrogen and carbon.
Hydrocarbons is an examples of 14 group hydrides.
Hydrocarbons are colorless and hydrophobic.
Their odors are usually like gasoline or lighter fluid.
In oil and gas industry, the hydrocarbon in term, combines petroleum and natural gas they are the two naturally occurring phases of hydrocarbon.

<h3>Alkanes</h3>

Alkanes also konwn as parafins
They are called as saturated hydrocarbons
Alkanes contain hydrogen and carbons arranged in tree structure
Alkanes have two main sources petroleum and natural gas.

Therefore, Hydrocarbons that lack π bond are called saturated hydrocarbons

Learn more about the saturated hydrocarbons on

brainly.com/question/16919281

#SPJ4

6 0

2 years ago

Read 2 more answers

STP refers to:

Greeley [361]

The STP is Standard temperature and pressure.

Standard temperature is defined as zero degrees Celsius (0° C)

Standard pressure supports 760 millimeters in a mercurial barometer (760 mmHg)

we have that
760 mmHg= 1 atm

therefore
the answer is 0 deg C and 1 atm.

8 0

3 years ago

How many km are in 5.6mm? 5.6x103 5.6x10-6 5.6x10-3 5.6x106

il63 [147K]

Hey there :)

Question: How many km are in 5.6mm?

=>5.6x10^3

=>5.6x10^-6

=>5.6x10^-3

=> 5.6x10^6

Answer:-

$5.6 \times 10^{ - 6}$