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Keith_Richards [23]
3 years ago
15

Someone please help will mark as brainliest

Chemistry
1 answer:
Inessa05 [86]3 years ago
4 0

Answer:

D water

Explanation:

sorry if im wrong bit i remeber correctñy i had this on my test

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Anettt [7]

Answers:

See attached table

Explanation:

The isotope symbol will have the mass number and chemical symbol.  The atomic number will be equal to the number of protons because the atomic number is the number of protons in an atom.  The electrons will be equal to the protons because the atom is neutral.  The neutrons can be found by subtracting the number of protons from the mass number.  The mass number can be found by adding the protons and neutrons.  It is also in the name of the isotope.

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<span>Why are leaves different colors?</span><span>
The chlorophyll breaks down</span>
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What is the balance of this reaction=1N2+3H2=2NH3
nydimaria [60]

N2 + 3 H2 = 2 NH3

Reaction type: synthesis

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3 years ago
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What are the oxidation numbers of the atoms in this reaction?
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4 years ago
You mix 265.0 mL of 1.20 M lead(II) nitrate with 293 mL of 1.55 M potassium iodide. The lead(II) iodide is insoluble. What amoun
slava [35]

Answer:

105 grams PbI₂

Explanation:

Pb(NO₃)₂ + 2KI => 2KNO₃ + PbI₂(s)

moles Pb(NO₃)₂ = 0.265L(1.2M) = 0.318 mole

moles KI = 0.293(1.55M) = 0.454 mole => Limiting Reactant

moles PbI₂ from mole KI in excess Pb(NO₃)₂ = 1/2(0.454 mole) = 0.227 mol PbI₂

grams PbI₂ = 0.227 mol PbI₂ x 461 g/mole = 104.68 g ≈ 105 g PbI₂(s)

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3 years ago
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