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gogolik [260]
3 years ago
6

To produce an electric current, you need a continuous source of _________.

Chemistry
2 answers:
Liono4ka [1.6K]3 years ago
6 0
Watts........ or potential diffrence
jekas [21]3 years ago
3 0
A. electrons..............
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Write the isotope notation for the following isotope: copper-63, copper-65, magnesium-24, magnesium-25, magnesium-26, lithium-6,
andrey2020 [161]
63/29 Cu (copper-63)
65/29 Cu (copper-65)
24/12 Mg (magnesium 24)
25/12 Mg (magnesium 25)
26/12 Mg (magnesium 26)
6/3 Li (lithium 6)
7/3 Li (lithium 7)

The top number is the mass number and you find that by adding the number of neutrons and atomic number
The bottom number is the atomic number and it’s the number or protons
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2 years ago
Which describes how radiation moves?
vazorg [7]
Hey <span>wademcelroy2005, thanks for submitting your question to Brainly!

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2 years ago
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Which of the following is not a trait of gases?
iVinArrow [24]
<span>d. tightly packed particles</span>
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2 years ago
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4. A student started with a 0.032 g sample of copper which he took through the series of reactions described in this experiment.
Elodia [21]

Answer:

Y=48.6\%

Explanation:

Hello,

In this case, we can consider the following chemical reaction for the oxidation of copper which only occurs at high temperatures:

2Cu+O_2\rightarrow 2CuO

In such a way, for 0.032 grams of copper, the following grams of copper (II) oxide (black product) are yielded:

m_{CuO}=0.032gCu*\frac{1molCu}{63.546gCu} *\frac{2molCuO}{2molCu}*\frac{79.546gCuO}{1molCuO}  =0.078gCuO

Therefore, the percent yield is:

Y=\frac{0.038g}{0.078g}*100\%\\ \\Y=48.6\%

Best regards.

6 0
3 years ago
A molecule consisting of more than one element that are chemically combined.
BaLLatris [955]

Answer:

compound, but I could be wrong

4 0
2 years ago
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