Is gold a compound or an element

Chemistry

1 answer:

timurjin [86]3 years ago

3 0

Gold is an element (Au) you can identify it on a periodic table

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Electron configurations are like an address because?

nekit [7.7K]

Each element shows the group and period they are through the number of energy level and valence electron in which can determine their place in the periodic table.

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3 years ago

A hypothesis is made before the experiment is conducted. <br> True or fasle

Viefleur [7K]

It should be at beginning. A hypothesis is called an educated guess of what might happen in the experiment.

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5 0

2 years ago

concentrated phosphoric acid is90% H3PO4 by mass and the remaining mass is water. The molarity of H3PO4 is 12.2M at temperature

blondinia [14]

Answer:

82.0 mL

Explanation:

Step 1: Given data

Concentration of concentrated acid (C₁): 12.2 M

Volume of concentrated acid (V₁): ?

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Volume of dilute acid (V₂): 1.00 L

Step 2: Calculate the required volume of the concentrated acid

We want to prepare a dilute solution from a concentrated one. We can calculate the volume of the concentrated acid using the dilution rule.

C₁ × V₁ = C₂ × V₂

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2 years ago

What is the ratio of mass of 0.7moles of nitrogen gas to 11.2liters of oxigen gas at STP?

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Answer:

if a 40.0-gram sample of the gas occupies 11.2 liters of space at STP? A balloon is filled with 5 moles of helium gas.

Explanation:

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Part 1: Describe the mass and surface temperature of the supergiant stars.

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