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3 years ago

Is wood a colloid or suspension ?

1 answer:

7 0

Wood is a suspension.

The easiest way I believe to find out whether a substance is a colloid or a suspension is determining is determining if the particles in a substance separate when sitting still. Unlike those in a suspension, particles in a colloid do not separate when sitting still.

Hope this helped!

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Draw the Lewis structures for Li atom and Br atom.

zheka24 [161]

Answer:

...

Explanation:

Li .

. . . .

: Br : ------ : Br :

. . . .

7 0

3 years ago

Which polynomials, given in square inches, could represent the area of a square with whole number side lengths if x is a whole n

erica [24]

Answer: The correct answers are $x^2-9\text{ and }x^2-100$

Explanation:

To find the polynomials which could represent the are of a square having side x greater than 2, we need to find the value of 'x' for all the given polynomials.

From the given options:

1. $x^2-9$

$x^2=9\\x=\sqrt{9}\\x=3,-3$

x = -3 is ignored.

2. $x^2-100$

$x^2=100\\x=\sqrt{100}\\x=\pm10\\x=10,-10$

x = -10 is ignored

3. $x^2-4x+4$

To solve this we use the quadratic formula:

$\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Putting values of a, b and c, we get:

$x=\frac{-(-4)\pm\sqrt{(-4)^2-4(1)(4)}}{2\times 1}\\x=2,2$

As, x comes out to be 2 and is not greater than 2. Hence, this is not considered.

4. $x^2+10x+25$

Solving for 'x' by splitting the middle term:

$\Rightarrow x^2+5x+5x+25\\\Rightarrow x(x+5)+5(x+5)\\x=-5,-5$

Hence, this is ignored.

5. $x^2+15x+36$

Solving for 'x' by splitting the middle term:

$\Rightarrow x^2+12x+3x+36\\\Rightarrow x(x+12)+3(x+12)\\x=-12,-3$

Hence, this is ignored.

So, the correct polynomials are $x^2-9\text{ and }x^2-100$

3 0

3 years ago

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Explain in your own words what the conservation of mass means?pls help

grigory [225]

Answer:

the conservation of mass means matter can be created or destroyed, it only changes forms

Explanation:

plz mark me as brainliest

6 0

3 years ago

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What type of chemical reaction is 10.Pb + FeSO, → PbSO, + far

masha68 [24]

Answer: To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character.

Explanation:

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4 years ago

In the chamber below, the volume is 20.5 L. What would the volume be if the temperature is increased to 500 K, the moles are red

grandymaker [24]

Answer:

C. bc I ssid

Explanation:

0+0+0+0+0+0=00

3 0

3 years ago

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