3 years ago

Which of these elements in GroupA on the periodic table has the largest atomic radius?

Chemistry

1 answer:

Allushta [10]3 years ago

6 0

Answer:

A i think is the answer

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Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number. (3 points)

bonufazy [111]

Answer:

Tin I thunk

Explanation:

I think

8 0

3 years ago

Using data from seismic waves, geologists have learned that Earth’s interior is made up of several

Wewaii [24]

Answer:

Explanation:

3 0

3 years ago

How many molecules of oxygen are produced when a sample of 38.9 g of water is decomposed by electricity?

statuscvo [17]

Answer:

A) $6.5\times 10^{23}\ \text{molecules}$

Explanation:

m = Mass of water = 38.9

M = Molar mass of water = 18 g/mol

$N_A$ = Avogadro's number = $6.022\times 10^{23}\ \text{mol}^{-1}$

The reaction of electrolysis would be

$2H_2O(l)\rightarrow 2H_2(g)+O_2(g)$

Number of moles of $H_2O$

$n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{38.9}{18}\ \text{mol}$

From the reaction it can be seen that 2 moles of $H_2O$ gives 1 mole of $O_2$

So, number of moles of $O_2$ produced is

$\dfrac{38.9}{18}\times \dfrac{1}{2}=1.081\ \text{mol}$

Number of molecules

$1.081N_A=1.081\times 6.022\times 10^{23}\\ =6.5\times 10^{23}$

So, $6.5\times 10^{23}\ \text{molecules}$ of oxygen is produced.

8 0

3 years ago

Living things are made mostly of what four main elements

Romashka [77]

CARBON

HYDROGEN

NITROGEN

OXYGEN

5 0

3 years ago

Using the formula F=ma, what is the force exerted by a 10 kg bowling ball

Blababa [14]

Answer:

<h2>The answer is 100 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

<h3>Force = mass × acceleration</h3>

From the question

mass = 10 kg

acceleration = 10 m/s²

We have

Force = 10 × 10

We have the final answer as

Hope this helps you

3 0

3 years ago