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miss Akunina [59]

4 years ago

15

If you are mixing a solution in a spray bottle with 15 ounces of water, how much chlorine do you need to add for the correct rat

io?

1 answer:

Wittaler [7]4 years ago

7 0

15 ounces so you can make it even

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The acidic ingredient in vinegar is acetic acid. The pH of vinegar is around 2.4, and the molar concentration of acetic acid in

IrinaK [193]

Answer: The value of acid ionization constant $K_a$ for acetic acid is $1.87\times 10^{-5}$

Explanation:

$CH_3COOH\rightarrow H^+CH_3COO^-$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.85 M and $pH$ = 2.4

$pH=-log[H^+]$

$[H^=}=c\times \alpha=10^{-2.4}=3.98\times 10^{-3}$

$K_a=?$

Putting in the values we get:

$K_a=\frac{(3.98\times 10^{-3})^2}{(0.85-3.98\times 10^{-3})}=1.87\times 10^{-5}$

Thus the value of acid ionization constant $K_a$ for acetic acid is $1.87\times 10^{-5}$

5 0

3 years ago

Use Figure 5-5 to determine the types of radiation described in problem 5

kirill [66]

Answer:6.12 x 10¹⁴ s⁻¹

Objects get their colors from reflecting only certain wavelengths when hit with white light. Light reflected from a green leaf is found to have a wavelength of 4.90 x 10⁻⁷ m. What is the frequency of the light?

Explanation:

3 0

3 years ago

A sample of dry gas weighing 2.1025 g is found to occupy 2.850 L at 22.0oC and 740.0 mm Hg. How many moles of gas are present?

soldi70 [24.7K]

0.11 moles of the gas are present in the sample of dry gas.

Explanation:

Data given:

mass of the gas = 2.1025 grams

volume of the gas = 2.850 litres

temperature = 22 degrees (273.15+22) = 295.15 K

Pressure = 740 mm Hg or 0.973 atm

moles of the gas =?

R = 0.08206 atmL/Mole K

From the ideal gas law the number of moles can be calculated in the sample of dry gas. Number of moles will be determined by the pressure exerted, volume and temperature of the gas.

The formula:

PV = nRT

n = $\frac{PV}{RT}$

putting the values in the above equation:

n = $\frac{2.850 x 0.973}{0.08206 X 295.15}$

= 0.11 moles

0.11 moles of the dry gas is present in the sample given.

4 0

4 years ago

What type of bonds hold together the atoms in an oxygen molecule?

MrRissso [65]

Answer:

Covalent bond

Explanation:

Covalent bond:

"The bond which is formed by the sharing of electrons between the atoms is called covalent bond"

The covalent bond is less stronger than ionic bond so require less energy to break as compared to the energy require to break the ionic bond.

The covalent bond is present between the oxygen molecule. It is the bond which is formed by the sharing of electrons between the two atoms of oxygen. Oxygen is present in group six of periodic table so there are six valance electrons are present. Oxygen molecules is formed by sharing the two valance electrons by each oxygen atom, thus double covalent bond is present in oxygen molecules. This is represented as O=O and two lone pairs are still present on each oxygen atom.

4 0

3 years ago

Like in a cat's eye, the human pupil changes shape in response to changes in

Yuki888 [10]

Answer:

B.

Our pupils contract and expand depending on the amount of light at any given time in order to avoid being blinded and to see better in the darkness.

5 0

3 years ago