All categories

3 years ago

Describe the difference between a ball-and-stick model and a space-filling model of a compound.

1 answer:

4 0

A space-filling model shows the relative amount of space each atom takes up. In other words, a space-filling model can show relative sizes of atoms. However, unlike ball-and-stick or structural models, space-filling models do not show bond lengths clearly. Bonds are not really like sticks in a ball-and-stick model.

You might be interested in

Type your answer in decimal form. Do not round. 2/5 tons = pounds

jeka57 [31]

one US ton is 2000 lbs, thus 2/5 of that is just their product.

answer: 800 lbs

4 0

2 years ago

Read 2 more answers

Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has converted 75% of the carbon-1

liraira [26]

Answer: 1145.8 years

Explanation:

Half-life of carbon-14 = 5720 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5720\text{years}}$

$k=1.21\times 10^{-4}\text{years}^{-1}$

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{years}^{-1}$

t = age of sample = ?

a = let initial amount of the reactant = 100 g

x = amount decayed = 75 g

a - x = amount left after decay process = 100 - 75 = 25g

Now put all the given values in above equation, we get

$t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}$

$t=1145.8years$

8 0

3 years ago

Read 2 more answers

WHY did the changes to the atomic model happen

Tom [10]

The model of the atom has dramatically changed over many many years.We learn atoms make up different substances and are the smallest particles of matter. which can have subatomic particles that are very small portions of matter.at first scientist only thought there were electrons which are negatively charged.

4 0

3 years ago

According to the law of conservation of mass, the total mass of the reacting substances is

atroni [7]

Answer:

I would say the last one because mass is not created nor destroyed.

Explanation:

7 0

2 years ago

A cube of salt is crushed before being stirred into water.

andrew-mc [135]

Physical change

Giddy Up!!!!!