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kvasek [131]
3 years ago
7

____ help scientists understand processes in the natural world by providing simpler representations of those processes.

Chemistry
1 answer:
Marina CMI [18]3 years ago
7 0

Answer:

Models help scientists understand processes in the natural world by providing simpler representations of those processes.

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I hope it helps, make sure of the answer before answering

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What does NO5 stand for?
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1- Nitrogen 5- Oxygen maybe, i can't find it on the periodic table

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When the following reaction is completed and written in the form of a net ionic equation, which of the following elements will N
Alex Ar [27]

Answer:

d. N

Explanation:

Chemical equation:

Pb(NO₃)₂(aq)  + K₂SO₄(aq)  →  PbSO₄(s) + KNO₃(aq)

Balanced Chemical equation:

Pb(NO₃)₂(aq)  + K₂SO₄(aq)  → PbSO₄(s) + 2KNO₃(aq)

Ionic equation:

Pb²⁺(aq) + 2NO₃⁻(aq)  + 2K⁺(aq) + SO₄²⁻(aq)  → PbSO₄(s) + 2K⁺(aq) + 2NO₃⁻(aq)

Net ionic equation:

Pb²⁺(aq) + SO₄²⁻(aq)  → PbSO₄(s)

The NO₃⁻(aq) and K⁺(aq)are spectator ions that's why these are not written in net ionic equation. The PbSO₄ can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

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3 years ago
If a log is burning in a a fireplace and the amount of oxygen reaching the log is decreased what happens
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The given equation is,

Ag(s) + CN^{-}(aq) + O_{2}(aq) --> [Ag(CN)_{2}]^{-} (aq) + H_{2}O(l)

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