Which set of coefficients will correctly balance the following skeleton equation?

at do oxygen (O) and bromine (Br) have in common? They both tend to gain electrons to gain stability. They both have seven valen

avanturin [10]

Both of them have high electronegativity. Hence they both tend to gain electrons to gain stability.

4 0

3 years ago

What is this element? 1s22s22p63s2 Magnesium Aluminum Potassium Neon

valkas [14]

Answer:

It should be silicon... I even googled it to see if I was correct and that’s what it says so can someone figure out why silicon is not an answer

Explanation:

6 0

2 years ago

Read 2 more answers

Element

Alexeev081 [22]

helium

has the most neutrons in the nucleus

7 0

3 years ago

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Which of the following are physical characteristics of blood? 1. it is more viscous than water 2. its temperature is about 38ºC

yawa3891 [41]

Explanation:

A property which does not bring any change in chemical composition of a substance is known as physical property.

For example, blood is more viscous than water, its pH is slightly alkaline, its temperature is about $38^{o}C$ ( $100.4^{o}F$ ) .

On the other hand, a property which changes chemical composition of a substance is known as a chemical property.

For example, precipitation, reactivity, toxicity etc are chemical property.

Sometimes, the change in color of a substance can also occur due to a chemical change.

Thus, we can conclude that following are the physical characteristics of blood.

it is more viscous than water.

its temperature is about $38^{o}C$ ( $100.4^{o}F$ ).

the pH is slightly alkaline.

it is about 8% of one’s total body weight.

6 0

3 years ago

Calculate the percentage of the void space out of the total volume occupied by 1 mole of water molecules. The density of water i

gtnhenbr [62]

Answer:

The percentage of the void space out of the total volume occupied is 93.11%

Explanation:

A mole of water contains 2 atoms of hydrogen and 1 atom of oxygen.

To calculate the volume of a mole of water, we calculate 2 times the volume of the hydrogen atom and 1 times the volume of the oxygen atom

Let's calculate this one after the other.

For the hydrogen, formula for the volume will be

$V_{hydrogen$ = 2 × 4/3 × π × $r_{H}^{3}$

where $r_{H}^{3}$ = 37 pm which is read as 37 picometer (1 picometer = 10^-12 m) = 37 × $10^{-12}$ meters

Volume of the hydrogen = 8/3 × (37 × 10^-12)^3 = 4.05 * 10^-31

we multiply this by the avogadro's number = 6.02 * 10^23

= 4.05 * 10^-31 * 6.02 * 10^23 = 2.6 * 10^-8 m^3

We do same for thr oxygen, but this time we do not multiply the volume of the oxygen by 2 as we have only one atom of oxygen

Volume of oxygen = 4/3 * π * (73 * 10^-12) ^3 * avogadro's number = 9.81 * 10^-7 m^3

adding both volumes together, we have 1.24 * 10^-6 m^3 or simply 1.24 ml ( 0.01 m = 1 ml)

Dividing the molar mass of one mole of water by its density, we can get the volume of 1 mole of water

= (18g/mol)/(1 g/ml) = 18 ml/mol

Now we proceed to calculate the volume of void = Total volume - volume of molecule = 18 - 1.24 = 16.76 ml

Now, the percentage of void = volume of void/total volume * 100%

= 16.76/18 * 100% = 93.11%

7 0

3 years ago