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Step2247 [10]
2 years ago
11

Which of the following correctly shows the relationship, in terms of number of particles, of the three substances?

Chemistry
1 answer:
uranmaximum [27]2 years ago
8 0
The answer is b but I’m not sure
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(40) If a hypothesis is proven correct, a theory is formulated.<br><br> True or false
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Answer: False, I believe.

Explanation: If a Hypothesis is proven correct, then another experiment to strengthen that Hypothesis is should be done.

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2 years ago
Density = _____<br> (A)weight/length<br> (B)mass/weight<br> (C)mass/volume<br> (D)volume/weight
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Density= Mass/Volume I am positive I just had an assignment on this
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Why is it important for scientists to use the scientific method?
MakcuM [25]

Explanation:

It <em><u>provides an objective, standardized approach to conducting experiments</u></em> and, in doing so, improves their results. By using a standardized approach in their investigations, scientists can feel confident that they will stick to the facts and limit the influence of personal, preconceived notions.

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3 years ago
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Radioactive decay can be described by the following equation where is the original amount of the substance, is the amount of the
soldi70 [24.7K]

Answer:

Iron remains = 17.49 mg

Explanation:

Half life of iron -55 = 2.737 years (Source)

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

Where, k is rate constant

So,  

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

k=\frac {ln\ 2}{2.737}\ year^{-1}

The rate constant, k = 0.2533 year⁻¹

Time = 2.41 years

[A_0] = 32.2 mg

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

So,  

[A_t]=32.2\times e^{-0.2533\times 2.41}\ mg

[A_t]=32.2\times e^{-0.610453}\ mg

[A_t]=17.49\ mg

<u>Iron remains = 17.49 mg</u>

8 0
3 years ago
Why does heating a liquid affect viscosity
sveta [45]

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7 0
3 years ago
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