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seropon [69]
3 years ago
15

Chalk is an ionic compound. Which is a property of all ionic compounds that makes chalk particularly useful for writing on a cha

lkboard? A a high melting point B hardness and brittleness C inability to dissolve in water D a multicolored appearance
Mathematics
2 answers:
Delicious77 [7]3 years ago
6 0

The correct answer is B. Hardness and brittleness

Explanation:

The ions in materials such as chalk and other ionic compounds are bonded by electrostatic forces. These features give ionic compound unique characteristics. This includes the fact these materials are usually hard, which means they do not deform easily and the fact these are brittle, which means they break easily.

These properties can be observed in chalk because the chalk itself keeps its shape or does not deform (hardness) but it breaks easily under pressure (brittleness), indeed due to this last property it is possible to write using chalk and due to the first property it is possible the chalk is a durable material.

nalin [4]3 years ago
5 0

Answer:

It’s B

Step-by-step explanation:

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P={x:x is a natural number,x<9​
Elanso [62]

Answer:

x:x = 1 so it is a natural number

Step-by-step explanation:

it can be any negative number because: -x<9

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5 0
3 years ago
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Please answer this question please ​
Bas_tet [7]
<h3>Answer:</h3><h3 /><h3>Amount = Rs 13891.50</h3><h3>Compound interest = Rs 1891.50</h3>

Step-by-step explanation:

C = Amount (A) - Principal (P)

Where

C is the compound interest

To find the amount we use the formula

A = P ({1 +  \frac{r}{100} })^{n}

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From the question

P = Rs 12, 000

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Substitute the values into the above formula

That's

A = 12000 ({1 +  \frac{5}{100} })^{3}  \\ A = 12000(1 + 0.05)^{3}  \\ A = 12000 ({1.05})^{3}

We have the answer as

<h3>Amount = Rs 13891.50</h3>

Compound interest = 13891.50 - 12000

<h3>Compound interest = Rs 1891.50</h3>

Hope this helps you

8 0
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Determine if the series 3/4 + 4/5 + 5/6 is convergent or divergent ​
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Step-by-step explanation:

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3 years ago
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laiz [17]
I think it is a but I’m not sure
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blondinia [14]

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