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Flauer [41]
3 years ago
10

Which feature causes a gap in the geologic record?

Chemistry
1 answer:
Serhud [2]3 years ago
5 0

Answer:

Hi, there the answer is

A)extrusion

Explanation:

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Calculate the percent of each component in the mixture. Show your calculations. Circle final answers.
Colt1911 [192]

Answer:

See Explanation

Explanation:

The question is incomplete; as the mixtures are not given.

However, I'll give a general explanation on how to go about it and I'll also give an example.

The percentage of a component in a mixture is calculated as:

\%C_E = \frac{E}{T} * 100\%

Where

E = Amount of element/component

T = Amount of all elements/components

Take for instance:

In (Ca(OH)_2)

The amount of all elements is: (i.e formula mass of (Ca(OH)_2))

T = 1 * Ca + 2 * H + 2 * O

T = 1 * 40 + 2 * 1 + 2 * 16

T = 74

The amount of calcium is: (i.e formula mass of calcium)

E = 1 * Ca

E = 1 * 40

E = 40

So, the percentage component of calcium is:

\%C_E = \frac{E}{T} * 100\%

\%C_E = \frac{40}{74} * 100\%

\%C_E = \frac{4000}{74}\%

\%C_E = 54.05\%

The amount of hydrogen is:

E = 2 * H

E = 2 * 1

E = 2

So, the percentage component of hydrogen is:

\%C_E = \frac{E}{T} * 100\%

\%C_E = \frac{2}{74} * 100\%

\%C_E = \frac{200}{74}\%

\%C_E = 2.70\%

Similarly, for oxygen:

The amount of oxygen is:

E = 2 * O

E = 2 * 16

E = 32

So, the percentage component of oxygen is:

\%C_E = \frac{E}{T} * 100\%

\%C_E = \frac{32}{74} * 100\%

\%C_E = \frac{3200}{74}\%

\%C_E = 43.24\%

5 0
3 years ago
A wooden spoon and a metal spoon are used to stir boiling water. After one minute, how do the temperatures of the immersed parts
kodGreya [7K]

Answer:

Metal is a conductor. it takes in heat very well. wood is an insulator. it takes in heat too, but less of it. this makes the wood handle cooler and the metal handle hot

5 0
3 years ago
Read 2 more answers
How many grams of P4O10 would be produced when 0.700 mole of phosphorus is burned?
AysviL [449]
We can solve the equation and show the solution below:

Oxygen atomic number is 16.
Phosphorus atomic number is 32.

We have the molecular weight:
Molecular weight = (31*4) + (16*10)
Molecular weight = 284 grams/mol

Solving for the grams:

0.4 mole (for P4) * (1 mol P4O10/1 mol P4) * (284 grams P4O10/1 mole P4O10)
Total grams = 113.6

The answer is 113.6 grams.
8 0
3 years ago
What is perodic table list all the elements up to 30 with their valencies​
insens350 [35]

Answer:

a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

8 0
3 years ago
Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and 0.80 mole of sodium cyanate (Na
Kitty [74]

Answer: Option (e) is the correct answer.

Explanation:

Equilibrium reaction equation for the given reaction is as follows.

    HCNO(aq) + H_{2}O(l) \rightarrow CNO^{-}(aq) + H_{3}O^{+}(aq)

It is given that initial moles of HCNO is 0.20 mol and for NaCNO is 0.80 mol. K_{a} of HCNO is 2 \times 10^{-4} mol.

Now, we will assume that at equilibrium there are x moles.

            HCNO(aq) + H_{2}O(l) \rightarrow CNO^{-}(aq) + H_{3}O^{+}(aq)

Initial:        0.20                           0.80              0

Change:      -x                              +x                +x

Equilibrium: 0.20 - x                 0.80 + x           x

As the volume of the given solution is 1 liter, equilibrium concentration and moles are same.

           K_{a} = \frac{[CNO^{-}][H_{3}O^{+}]}{[HCNO]}

       2.0 \times 10^{-4} = \frac{x(0.80 + x)}{(0.20 - x)}

              x = 5.0 \times 10^{-5} M

Then, pH = -log[H_{3}O^{+}]

               = -log (5.0 \times 10^{-5})

               = 4.30

Thus, we can conclude that pH of given buffer solution is 4.30.

8 0
3 years ago
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