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katrin2010 [14]
2 years ago
12

Can someone help??. This is super hard

Chemistry
1 answer:
podryga [215]2 years ago
4 0

111 cchuyttrfgh

tyujklkjhgt

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How many zeroes are significant in the measurement 0.0400200?
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Answer:

Explanation:

4

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Which of the following pairs of elements is most likely to form an ionic compound? (Hint - question 4 tells you what types of el
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\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}

Actually Welcome to the Concept of the Ionic bonds.

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Which missing item would complete this alpha decay reaction?<br><br> 257/100 Fm= ________+4/2He
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Answer: ₉₈²⁵³Cf

253 is a superscript to the left of the symbol, Cf, which represents the mass number, and 98 is a subscript to the left of the same symbol, which represents the atomic number.

Explanation:

1) The alpha decay equation shows that the isotope Fm - 257, whose nucleus has 100 protons and 157 neutrons, emitted an alpha particle (a nucleus with 2 protons and 2 neutrons).

2) Therefore:

i) the mass number decreased in 4, from 257 to 257 - 4 = 253.

2) the atomic number decreased in 2, from 100 to 100 - 2 = 98.

3) Hence the formed atom has atomic number 98, which is californium, Cf, and the isotope is californium - 253.

4) The item that completes the given alpha decay reaction is:

₉₈²⁵³ Cf.

5) The complete alfpha decay reaction is:

₁₀₀²⁵⁷ Fm → ₉₈²⁵³Cf + ₂⁴He

You can verify the mass balance:

257 = 253 + 4, and

100 = 98 + 2

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3 years ago
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What molecule is removed during dehydration synthesis?.
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See explaination

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Please kindly check attachment for the step by step solution of the given problem.

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