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iragen [17]
3 years ago
14

What’s a test you can give to show the difference between metal and gold

Chemistry
1 answer:
DENIUS [597]3 years ago
7 0

Answer:

An Acid Test

An acid test is any qualitative chemical or metallurgical assay which uses acid ( most commonly), and historically, the use of a strong acid to distinguish gold from base metals.

Explanation:

I hope it helps

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What is the difference between science and pseudoscience
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B. Scientific claims can be verified through observation and experimentation, while pseudoscientific claims cannot.   At least I think it is right.

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3 years ago
When the number of electrons in an atom changes, then the atom's_______ change.
AlekseyPX

Answer:

It would change the charge of the atom.

Explanation:

Added electrons cause atoms to be negatively charged, lost electrons cause atoms to be positively charged.

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What does multivalent mean???
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A gas has a pressure of 5.7 atm at 100.0°C. What is its pressure at20.0°C (Assume volume is unchanged)
son4ous [18]

Answer:

\large \boxed{\text{4.5 atm}}

Explanation:

The volume and amount of gas are constant, so we can use Gay-Lussac’s Law:

At constant volume, the pressure exerted by a gas is directly proportional to its temperature.

\dfrac{p_{1}}{T_{1}} = \dfrac{p_{2}}{T_{2}}

Data:

p₁ =5.7 atm; T₁ = 100.0 °C

p₂ = ?;          T₂ =  20.0 °C

Calculations:

1. Convert the temperatures to kelvins

T₁ = (100.0 + 273.15) K = 373.15

T₂ =  (20.0 + 273.15) K = 293.15

2. Calculate the new pressure

\begin{array}{rcl}\dfrac{5.7}{373.15} & = & \dfrac{p_{2}}{293.15}\\\\0.0153 & = & \dfrac{p_{2}}{293.15}\\\\0.0153\times 293.15 &=&p_{2}\\p_{2} & = & \textbf{4.5 atm}\end{array}\\\text{The new pressure will be $\large \boxed{\textbf{4.5 atm}}$}

6 0
3 years ago
Write the word and balanced chemical equations for the reaction between:
Greeley [361]

Answer:

HCl + Ca(OH)2 = CaCl2 + H2O - Chemical Equation Balancer.

5 0
3 years ago
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