3 years ago

What are the metalloids on the periodic table?

1 answer:

5 0

<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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Which is an alkaline earth metal?

Hitman42 [59]

Answer:

actually there are 6 of them

Explanation:

heres the list:

They are beryllium, magnesium, calcium, strontium, barium, and radium.

hope it helpssss :)

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3 years ago

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Which terms describe plastics that can and potentially be recycled?

hammer [34]

C describes plastics that can be recycled. Thermoplastic can be remolded and reheated after forming, whereas thermoset strengthens when heated

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2 years ago

The ph of a solution containing 0.818 M acetic acid<br> (ka1.76*10-5) ans 0.172 M sodium acetate is?

kvasek [131]

Explanation:

It is known that the relation between pH and $pK_{a}$ is as follows.

pH = $pK_{a} + log \frac{[salt]}{[acid]}$

and, $pK_{a} = -log K_{a}$

Hence, first we will calculate the value of $pK_{a}$ as follows.

$pK_{a} = -log K_{a}$

= $-log (1.76 \times 10^{-5}$

= 4.75

Now, we will calculate the value of pH as follows.

pH = $pK_{a} + log \frac{[\text{sodium acetate}]}{\text{acetic acid}}$

= $4.75 + log \frac{0.172}{0.818}$

= 4.75 + (-0.677)

= 4.07

Therefore, we can conclude that the pH of given solution is 4.07.

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3 years ago

What is the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65% oxygen?

aliya0001 [1]

Li2CO3 ; variance= 1.26x10^-3

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Why is each year's vaccine different?

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Because the birds that fly overseas carry different flu viruses every year.

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