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seropon [69]
2 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]2 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]2 years ago
5 0

Answer:

It’s B

Step-by-step explanation:

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2 years ago
complete each step of the below application problem using the letter answer choices type in the letter and each blank not all ch
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7 0
3 years ago
Step by step what is 3a+4b+5a+6
Sedaia [141]

Hello!

Answer:⇒⇒⇒⇒⇒=8a+4b+6

Explanation:

↓↓↓↓↓↓↓↓↓↓↓↓

Group like terms:

↓↓↓↓↓↓↓↓↓↓↓↓↓↓

=3a+5a+4b+6

Add similar elements.

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Hope this helps!

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4 0
3 years ago
Trigonometry
Nadusha1986 [10]

55° is equal to 0.9599 radians.  

Step-by-step explanation:  

Step 1:  

If an angle is represented in degrees, it will be of the form x°.  

If an angle is represented in radians, it will be of the form \frac{\pi}{x}radians.  

To convert degrees to radians, we multiply the degree measure by \frac{\pi}{180}.

For the conversion of degrees to radians,

the degrees in radians = (given value in degrees)(\frac{\pi}{180}).

Step 2:

To convert 50°,  

55\left(\frac{\pi}{180}\right)=\frac{55\pi}{180}.

0.3055 (\pi) =0.9599 radians.

So 55° is equal to 0.9599 radians.

7 0
3 years ago
Read 2 more answers
Solve (x-2<5) u (x+7>6)
grin007 [14]

x= | 1 < x < 3

x + 2 < 5 and x - 7 > -6

x < 5 - 2 and x > -6 + 7

I don't know if I am 100% right.

4 0
2 years ago
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