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3 years ago

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Given four particle models: which two models can be classified as elements?

1 answer:

Rainbow [258]3 years ago

8 0

Where are the questions answer key

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Mutations that neither benefit nor harm the organism have (blank) effect on the organisms survival

Daniel [21]

Answer:

I would say that the mutation has no effect on the organism, as it doesn't help or harm it.

hope this helps :)

Explanation:

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3 years ago

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What are the metalloids on the periodic table?

Sauron [17]

<span>The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.</span>

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2 years ago

A solution is prepared by adding 0.0231moles of H3O+ ions to 3.33L of water. What is the pH of this solution

MrMuchimi

Answer:

2.15

Explanation:

For this question, we have to remember the <u>pH formula</u>:

$pH~=~-Log[H_3O^+]$

By definition, the pH value is calculated when we do the -Log of the concentration of the <u>hydronium ions</u> ( $H_3O^+$ ). So, the next step is the calculation of the <u>concentration</u> of the hydronium ions. For this, we have to use the <u>molarity formula</u>:

$M=\frac{mol}{L}$

We already know the number of moles (0.0231 moles) and the volume (3.33 L). So, we can plug the values into the molarity formula:

$M=\frac{0.0231~moles}{3.33~L}=0.00693~M$

With this value, now we can calculate the pH value:

$pH~=~-Log[0.00693~M]~=~2.15$

<u>The pH would be 2.15</u>

I hope it helps!

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3 years ago

True or false transuranium elements are synthetic elements with atomic #’s of 93 or higher.

devlian [24]

It's absolutely TRUE...........

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