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Hatshy [7]
3 years ago
13

What do bacteria need to reproduce?

Chemistry
1 answer:
ExtremeBDS [4]3 years ago
5 0
Bacteria need a warm environment.
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Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04
evablogger [386]

Answer:

16.6 mg

Explanation:

Step 1: Calculate the rate constant (k) for Iodine-131 decay

We know the half-life is t1/2 = 8.04 day. We can calculate the rate constant using the following expression.

k = ln2 / t1/2 = ln2 / 8.04 day = 0.0862 day⁻¹

Step 2: Calculate the mass of iodine after 8.52 days

Iodine-131 decays following first-order kinetics. Given the initial mass (I₀ = 34.7 mg) and the time elapsed (t = 8.52 day), we can calculate the mass of iodine-131 using the following expression.

ln I = ln I₀ - k × t

ln I = ln 34.7 - 0.0862 day⁻¹ × 8.52 day

I = 16.6 mg

8 0
3 years ago
Which substances will make a salt when combined?
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The answer is D. Fertilizer and vinegar
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What is the difference between physical and chemical change?
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There are several differences between<span> a </span>physical and chemical change<span> in matter or substances. A </span>physical change<span> in a substance doesn't </span>change<span> what the substance is. In a </span>chemical change<span> where there is a </span>chemical<span> reaction, a new substance is formed and energy is either given off or absorbed.</span>
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For which of the following solutions would an increase in pressure result in an increase in solubility of a solute?
kozerog [31]

Answer:

gases, liquids and solids

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The sodium atom loses an electron to form a sodium ion (Na+). Which statement is correct with respect to its atomic radius? A. T
maw [93]

Answer:B. The sodium ion has a smaller radius than the atom.

Explanation:

Because size of cation is less than neutral atom

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3 years ago
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