3 years ago

What are 3 signs that a chemical reaction is happening, what tells you that this is definitely a chemical reaction?

1 answer:

8 0

Produces heat, putting off air or bubbles and changes the smell or odor it changes the state that’s how you know it is a chemical reaction

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Calcium oxide is a basic oxide.Explain, using a chemical equation, why calcium oxide is basic.

zlopas [31]

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Explanation:Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical ... Chemical formula. CaO ... Both it and a chemical derivative (calcium hydroxide, of which quicklime is the base anhydride) are important commodity ... The major use of quicklime is in the basic oxygen steelmaking (BOS) process.

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2 years ago

Nuclear energy could come from

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Nuclear energy comes from splitting of Barium atom to form Krypton atom

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3 years ago

How many mole of H2 will be produced if 0.500 grams of magnesium is reacted with 10.00mL of 2.0 M HCl?

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Yes, you're right the answer is 0,02 moles.

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3 years ago

Naturally occurring neon exists as three isotopes. 90.51% is ne-20 with a mass of 19.99 amu, 0.27% is ne-21 with a mass of 20.99

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The atomic mass of an element is the average relative mass of its atoms as compared with an atom of carbon-12 whose mass is taken as 12. In terms of percentages of different isotopes, the average atomic mass can be determined as follows: $A_{average}$ = ∑( $p_{i}$ X $A_{i}$ )/100. Where, $p_{i}$ is the percentage abundance of isotope with atomic number $A_{i}$ .

So, average atomic mass of neon = $\frac{(90.51 X 19.99) + (0.27 X 20.99) + (9.22 X 21.99)}{100}$ = 20.177 amu.

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3 years ago

A student is instructed to design a device that can allow one user to hear a voice of another surer a distance of 5 kilometers w

Scorpion4ik [409]

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A device designed to transmit electromagnetic waves through the air should be developed.

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2 years ago