2 years ago

An element found in groups 3-12 of the periodic table is classified as a[n]

Chemistry

1 answer:

pochemuha2 years ago

7 0

Answer:

Transition Metals

Explanation:

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What is the molecular formula for a compound with an empirical formula of CH2O if its experimentally determined molecular weight

NNADVOKAT [17]

Answer:

C6H12O6.

Explanation:

Adding up the relative atomic masses of the elements

C + 2H + O

= 12 + 2*1 + 16.

= 30.

180 / 30 = 6 so the molecular formula is:

C6H12O6.

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3 years ago

An oxide of phosphorus contains 56.4% phosphorus and 43.6% oxygen. It's relative molecular mass is 220. Find both the empirical

sladkih [1.3K]

Moles of P = 56,4g/30,974g/mole = 1,82 moles P
moles of O = 43,6/15,999 = 2,73 moles of O

converting to the simplest ratio:
For P : 1,82/1,82 = 1
For O : 2,73/1,82 = 1,5

1 P and 2 oxygens.
PO2 -> the empirical formula

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3 years ago

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_______________ galaxies range in shape from almost perfect spheres to flattened globes with the light brightest in the center a

Mademuasel [1]

The answer is B: elliptical. Spirals have arms so are not round, no such thing as circular, and irregular don't have simple geometric shapes

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3 years ago

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Particles of light are known as

Mashcka [7]

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The particles of light known as photon.

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3 years ago

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The heat of fusion for water is 80. cal/g. How many calories of heat are needed to melt a 35 g ice cube that has a temperature o

HACTEHA [7]

Answer: 2800 calories

Explanation:

Latent heat of fusion is the amount of heat required to convert 1 mole of solid to liquid at atmospheric pressure.

Amount of heat required to fuse 1 gram of water = 80 cal

Mass of ice given = 35 gram

Heat required to fuse 1 g of ice at $0^0C$ = 80 cal

Thus Heat required to fuse 35 g of ice = $\frac{80}{1}\times 35=2800cal$

Thus 2800 calories of energy is required to melt 35 g ice cube

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3 years ago