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Volgvan
2 years ago
12

PLEASE HELP THIS THE THE LAST TEST OF THE SEMESTER

Chemistry
1 answer:
Kazeer [188]2 years ago
3 0

Answer:

Its not balanced

Explanation:

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What will be the bond angles for an sp3d2 hybridized atom participating in six identical single covalent bonds
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A sound with more vibrations per second sounds higher than a sound with fewer vibrations per second.
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3 years ago
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Iodine-131 is a beta emitter used as a tracer in radio immunoassays in biological systems. It follows first order kinetics. The
allsm [11]

<u>Answer:</u> The amount of Iodine-131 remain after 39 days is 0.278 grams

<u>Explanation:</u>

The equation used to calculate rate constant from given half life for first order kinetics:

t_{1/2}=\frac{0.693}{k}

where,

t_{1/2} = half life of the reaction = 8.04 days

Putting values in above equation, we get:

k=\frac{0.693}{8.04days}=0.0862days^{-1}

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

k = rate constant = 0.0862days^{-1}

t = time taken for decay process = 39 days

[A_o] = initial amount of the sample = 8.0 grams

[A] = amount left after decay process = ?

Putting values in above equation, we get:

0.0862=\frac{2.303}{39}\log\frac{8.0}{[A]}

[A]=0.278g

Hence, the amount of Iodine-131 remain after 39 days is 0.278 grams

3 0
2 years ago
Agree or disagree with which one and provide evidence thank you!!!!!!!:)​
forsale [732]

Answer:number 2

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the definition of photosynthesis is that carbon dioxide and water changes into sugar and oxygen

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