3. What effect does dark energy have on the universe?

1 answer:

4 0

Dark energy and dark matter seem over analyzed, although they are no different than gravity and wind. Dark energy can be the pulling caused by black holes, stars, and large planets. Dark matter also is just the effect of cosmic dust and debris pushed from explosions but also pulling caused by distant gravitational bodies.

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Read the list of elements given below.

PtichkaEL [24]

Answer:

b All of them are highly reactive nonmetals

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3 years ago

Which of the following are associated with a rock's chemical composition? Select all that apply.

ZanzabumX [31]

Will you help me after?

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3 years ago

In the Alkali metals what element is the same "Period" as the element Neon

Slav-nsk [51]

Answer:

Lithium

Explanation:

The answer is Lithium because the Alkali metals family is in the group 1A and the element neon is in the second period. If you look at the periodic table group 1A and the second period connects at the element Lithium.

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What types of materials are usually ductile

White raven [17]

Metals are ductile not non metals

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4 years ago

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What is the complete ionic equation of Al2(SO4)3(aq) + 2K3PO4 (aq) = 2AlPO4 (s) + 3K2SO4 (aq)?

olchik [2.2K]

Answer:

$2Al^{3+} (aq) +2PO_{4}^{3-} (aq) = 2AlPO_{4} (s)$

Explanation:

1. First, you want to break up the aqueous solutions into their respective ions (remember to write the charge and number of each element). Note that you can only do this to compounds marked as <em>aqueous</em>, so leave the solid be.

$2Al^{3+} + 3SO_{4}^{2-} + 2K_{3}^{1+} + 2PO_{4}^{3-} = 2AlPO_{4} (s) + 3K_{2}^{1+} +3SO_{4}^{2-}$

(Technically, both Potassium ions would have a coefficient of 6. I am leaving them as they were originally just for ease)

2. Now, you want to get rid of compounds on each side that are the same. These are called spectator ions, and they are exactly as the name says: they simply "spectate" the reaction, meaning they can be removed from the complete ionic equation.

Both the sulfate and potassium ions would be considered spectator ions and would be canceled out. Once removed the equation would look like:

$2Al^{3+} (aq) +2PO_{4}^{3-} (aq) = 2AlPO_{4} (s)$

3. The complete ionic equation would be:

$2Al^{3+} (aq) +2PO_{4}^{3-} (aq) = 2AlPO_{4} (s)$

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3 years ago

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