All categories

3 years ago

How many atoms in: 1. PbF3 - 2. Pb2O3 -

Chemistry

1 answer:

Gre4nikov [31]3 years ago

3 0

Answer:

The correct answer is 1) 257 and 2) 135

Explanation:

You might be interested in

Scandium 15. Write the nuclear symbol for an ion with a charge of +2,20 protons, and 24

Hoochie [10]

If the element has a charge of +2 it has lost two electrons giving it an overall positive charge making it a cation. In order to find the number of electrons, take the elements atomic number and subtract two since it lost two electrons

8 0

3 years ago

Determine the volume of fluid in the graduated cylinder shown.

alexgriva [62]

Answer:

47.3 ml

Explanation:

The graduated cylinder is shown in the image attached.

Now we have to take a good look at the cylinder, the lines between 45 and 50 are 46, 47, 48 and 49. Even though the points in between two lines weren't graduated but we can intelligently guess the correct volume by observing the upper meniscus of the liquid. Hence the answer.

8 0

4 years ago

Read 2 more answers

Enter your answer in the provided box.

nexus9112 [7]

Answer:

V₂ = 50.93 L

Explanation:

Initial volume, $V_1=43.1\ L$

Initial temperature, $T_1=24^{\circ} C=24+273=297\ K$

Final temperature, $T_2=78^{\circ} C=78+273=351\ K$

We need to find the final volume of the gas. The relation between the volume and the temperature is given by :

$\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{43.1\times 351}{297}\\\\V_2=50.93\ L$

So, the final volume of the gas is 50.93 L.

4 0

3 years ago

Describe the way the moon moves in space?

Scilla [17]

Gravitational Pull, is the answer. just like we orbit the sun, the moon orbits us. we act almost like a magnet, we follow the biggest guy as leader. if the sun dissapeared, we would die, but probably, we would start to revolve around jupiter as it is the biggest

4 0

3 years ago

Help help help pls pls pls

Arlecino [84]

Explanation:

Aluminium and Chlorine.

Al and Cl2.

4 0

3 years ago