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valentinak56 [21]
3 years ago
7

PLEASE HELP!! How could using either more or less of a chemical in a scientific experiment cause a change in results?

Chemistry
1 answer:
charle [14.2K]3 years ago
4 0
The chemical could have more or less of a reaction to the other chemicals in the experiment
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Elements will always have the same number of protons no matter the isotopes. Isotopes only change the number of neutrons. Silicon will always have 14 protons. So silicon-28 has 14 protons and 14 neutrons. Silicon-29 has 14 protons and 15 neutrons. Silicon-30 has 14 protons and 16 neutrons.

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Which solution is the best conductor of electric
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(C) 0.1 mole of NaCl dissolved in 1,000. mL of water

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The conductivity of 0.1 mole of NaCl dissolved in 1000 mL of water will be greatest as the number of ions in 0.1 mole of NaCl will be more than 0.001, 0.05 and 0.005 moles of NaCl. Greater the number of ions in the solution, greater will be the conductivity. Specific Conductivity decreases with a decrease in concentration. Since the number of ions per unit volume that carry current in a solution decrease on dilution. Hence, concentration and conductivity are directly proportional to each other.

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3 years ago
I really need help it's urgent help ! Don't ignore it .Your work will be appreciated and don't spam
gtnhenbr [62]

ツ here your answer

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  • A)Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

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  • B)Balance the Chemical Equation for the reaction of calcium carbonate with hydrochloric acid: 
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<em><u>M</u></em><em><u>a</u></em><em><u>r</u></em><em><u>k</u></em><em><u> </u></em><em><u>m</u></em><em><u>e</u></em><em><u> </u></em><em><u>i</u></em><em><u>n</u></em><em><u> </u></em><em><u>b</u></em><em><u>r</u></em><em><u>a</u></em><em><u>i</u></em><em><u>n</u></em><em><u>l</u></em><em><u>i</u></em><em><u>s</u></em><em><u>t</u></em>

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2 years ago
Which choice below represents a negative impact that chemistry has on society?
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Answer:It’s C on edge 2020

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Explanation:

I got it right :))

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