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LiRa [457]
4 years ago
10

How many metaloides are found on the periodic table

Chemistry
1 answer:
Vesna [10]4 years ago
7 0
The metalloids<span>; 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 </span>periodic table<span>. So there should be 8.</span>
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What do we need to know about a molecule in order to carry out molarity calculations
professor190 [17]

Answer the type of cell

Explanation:

7 0
3 years ago
Calculate the concentration of oxalate ion (c2o42–) in a 0.175 m solution of oxalic acid (c2h2o4). [for oxalic acid, ka1 = 6.5 ×
Darina [25.2K]

C2H2O4 C2HO4- + H+

0.175 - x x x + y

C2HO4- c2o42– + H+

x - y y x + y

K2 = (y) (x +y) / (x-y)

As, y << x

So, K2 = (y) (x) / (x)

K2 = y =6.1 × 10^–5

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7 0
4 years ago
In everyday speech, the words precision and accuracy are often used interchangeably. When these terms are used in science, are t
zvonat [6]

Answer:

            No, in science their meanings are not the same as their everyday meanings.

Explanation:

                   In Science, Precision and Accuracy are defined as,

Accuracy:

               Accuracy is the value which is closest to the known or standard value.

Precision:

                While, Precision is the value of closeness of two measured values to each other.

Example:

             Let suppose in Chemistry Lab you weight an object as 50 g. While the actual weight of that object is 30 g. It means your reading is not accurate.

             On second measurement you find that the object weight is 31 g. This time your reading is not precise.

8 0
4 years ago
Question 1
slamgirl [31]

Answer:

Fossil record

Explanation:

but first think about it befor you do so it could be wrong im not a computer

7 0
3 years ago
Which fossil fuel is mainly used for heating and cooking?
Anna [14]

I would say C. petroleum


A is wrong

B is impractical for "mainly used"

D thats too expensive

4 0
3 years ago
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