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3 years ago

Which of the following terms describes a piece of pure gold?

Chemistry

2 answers:

vladimir2022 [97]3 years ago

6 0

Answer:

The correct answer is the option: d. mixture.

Explanation:

Hello! Let's solve this!

Pure gold is a mixture, since it is mixed with some other metal to increase its characteristics.

Pure gold or fine gold is 24-karat gold.

A mixture is the union of one or more elements, but they are not chemically linked.

We conclude that the correct answer is the option: d. mixture.

SCORPION-xisa [38]3 years ago

4 0

Mixture would be the piece of pure gold. I don't know the explanation but the answer is mixture, I'm sure about that it is mixture, I read it somewhere.

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A mixture consists of 28% oxygen, 14% hydrogen, and 58% nitrogen by volume. A sample of this mixture has a pressure of 4.0 atm i

stepladder [879]

Answer:

C) 1.3 mol

Explanation:

Using gas law we can find the initial moles of the sample of the mixture, as follows:

PV = nRT

PV / RT = n

<em>Where P is pressure: 4.0atm</em>

<em>V is volume: 9.6L</em>

<em>R is gas constant: 0.082atmL/molK</em>

<em>T is absolute temperature: 300K</em>

<em>And n are moles of the gas</em>

<em />

PV / RT = n

4.0atm*9.6L / 0.082atmL/molK300K = n

n = 1.56moles of the mixture of the gas are present into the 9.6L container

Now, 14% of this gas is hydrogen that was removed of the system, that is:

1.56mol*14% = 0.22 moles of hydrogen are removed.

Thus, moles of gas that remains in the container are:

1.56mol - 0.22mol = 1.34mol.

Right answer is:

6 0

2 years ago

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Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. A 2

svp [43]

Answer:

The correct option is;

X, W, Y, Z

Explanation:

The parameters given are;

Spring (S), Spring Constant (N/m)

W, 24

X, 35

Y, 22

Z, 15

The equation for elastic potential energy, $E_e$ , is $E_e = 0.5 \times k \times x^2$

The above equation can also be written as $E_e =\dfrac{1}{2} \times k \times x^2$

Where:

k = The spring constant in (N/m)

x = The spring extension

Therefore, since the elastic potential energy, $E_e$ , of the spring is directly proportional to the spring constant, k, we have the springs with higher spring constant will have higher elastic potential energy, $E_e$ , therefore the correct order is as follows;

X > W > Y > Z

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3 years ago

Water only gets evaporated from the ocean. True or false?

krek1111 [17]

Answer:

false

Explanation:

7 0

2 years ago

Will give most brainly.

Anna [14]

Answer:

One mole

Explanation:

It tells u the concentration

8 0

2 years ago

How many protons, electrons, and neutrons does 1 H+ isotope contain

nlexa [21]

<h3>Answer:</h3>

H+ contains 1 proton, 0 neutrons, 0 electrons.

<h3>Explanation:</h3>

An atom is the smallest particle of an element that can take part in a chemical reaction.
Atoms are made of sub-atomic particles neutrons and protons found in the nucleus and electrons found in the energy levels.
A hydrogen atom contains 1 proton and 0 neutrons in the nucleus and 1 electron in the energy levels.
A hydrogen atom loses an electron to form an ion with 1 proton, 0 neutron and 0 electron.

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2 years ago

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