All categories

3 years ago

Which diagram or diagrams represent a compound?

Chemistry

1 answer:

crimeas [40]3 years ago

8 0

Answer:

x and z cuz compound are group of molecules or atoms

You might be interested in

Ao 25% of 80 = please help me asap this is math btw not chem

mestny [16]

Answer:

Explanation:

if you sub and I am writing it simple

3 0

3 years ago

Read 2 more answers

PLS HELP!! WILL GIVE BRAINLY!!

mamaluj [8]

Answer:

2. Mechanical

3. Chemical

4. Mechanical

5. Mechanical

6. Chemical

7. Mechanical

8. Mechanical

9. Mechanical

10. Chemical

Explanation:

8 0

3 years ago

1. Determine the number of atoms in 4.64 g gold.

liubo4ka [24]

Answer:

The answer to your question is below

Explanation:

1.-

a) Look for the mass number of Gold in the periodic table

Mass number = 197 g

Use proportions to answer this question

197 g of gold ------------- 6.023 x 10 ²³ atoms

4.64 g of gold ---------- x

x = (4.64 x 6.023 x 10²³) / 197

x = 1.42 x 10²² atoms

2.- mass of 4.12 x 10²⁴ molecules of glucose

Molecular mass = (6 x 12) + (12 X 1) + (6 x 16)

= 72 + 12 + 96

= 180 g

180 g of glucose ------------------- 6.023 x 10 ²³ molecules

x ------------------- 4.12 x 10 ²⁴ molecules

x = (4.12 x 10²⁴ x 180) / 6.023 x 10²³

x = 1231.3 g of glucose

4 0

3 years ago

Solid potassium chlorate decomposes into solid potassium chloride and oxygen gas. If 2.00 g potassium chlorate decomposes in a c

abruzzese [7]

Answer : The final chamber pressure is 0.746 atm.

Explanation:

First we have to calculate the moles of $KClO_3$ .

Molar mass of $KClO_3$ = 122.5 g/mole

$\text{ Moles of }KClO_3=\frac{\text{ Mass of }KClO_3}{\text{ Molar mass of }KClO_3}=\frac{2.00g}{122.5g/mole}=0.0163moles$

Now we have to calculate the moles of $O_2$ .

The balanced chemical reaction will be:

$2KClO_3\rightarrow 2KCl+3O_2$

From the balanced reaction we conclude that,

As, 2 moles of $KClO_3$ react to give 3 moles of $O_2$

So, 0.0163 moles of $KClO_3$ react to give $\frac{3}{2}\times 0.0163=0.0244$ moles of $O_2$

Now we have to calculate the pressure of gas.

Using ideal gas equation:

$PV=nRT$

where,

P = pressure of gas = ?

V = volume of gas = 0.800 L

T = temperature of gas = $25.0^oC=273+25.0=298K$

R = gas constant = 0.0821 L.atm/mole.K

n = number of moles of gas = 0.0244 mole

Now put all the given values in the ideal gas equation, we get:

$P\times (0.800L)=0.0244mole\times (0.0821L.atm/mole.K)\times (298K)$

$P=0.746atm$

Therefore, the final chamber pressure is 0.746 atm.

3 0

4 years ago

According to the kinetic molecular theory, the pressure of a gas in a container will increase if the

oksano4ka [1.4K]

According to the kinetic molecular theory, the pressure of a gas in a container will increase if the "number of collisions with the container wall increases".

Option: A

Explanation:

Pressure is characterized as force acting by area per unit. It is triggered by gas molecules bombarding on the container walls. Kinetic molecular theory suggests that gases are made up of large numbers of small particles with continuous movement. Here there are elastic collisions between gas particles and between particles and container walls. There are no forces of attraction among them because of the large spaces between the gas particles. The gas temperature relies on the particle's average kinetic energy.

3 0

3 years ago