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Triss [41]
3 years ago
7

In order to be a chemical reaction matter must be used up or destroyed

Chemistry
1 answer:
mariarad [96]3 years ago
4 0
The atoms are rearranged...
atoms AREN'T created or destroyed
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How much .05 M Hcl solution can be made by diluting 250 mL of 10 M HCl
kirza4 [7]
0.05 * V1 = 250 * 10 

<span> V1 = 2500 / 0.05 </span>

<span> V1 = 2500 * 20 </span>

<span> V1 = 50000 mL </span>

<span>V1 = 50 Liters . 

Hope this helped! :3</span>
6 0
3 years ago
Is a pencil falling to the floor anon contact force, a force, or a contact force
Brut [27]

when the top of the pencil moves in one direction, the bottom end on the ground will move in another, but due to the frictional force it will move by a lesser amount, and the center of mass of the pencil will be accelerated in the horizontal direction due to the force of friction

4 0
3 years ago
A shiny piece of metal has a volume of 315 cm3 and a mass of 851 g. what is the density of the metal?
NemiM [27]

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8 0
1 year ago
Read 2 more answers
Let a represent the red spheres and b represent the blue spheres. write a balanced equation for the equilibrium reaction.
krok68 [10]
I have attached the diagram related to this question.

Answer:
5A₂ + 5B .................> 4A₂B + A₂ + B

Explanation:
1- For the reactants:
We can note that:
i- we have 5 moles of substance A which is diatomic. This means that we have 5A₂
ii- we have 5 moles of substance B which is monoatomic. This means that we have 5B
Based on the above, for the reactants side, we have:
5A₂ + 5B

2- For the products:
We can note that:
i- we have 4 moles of a substance formed from the combination of two moles of substance A with one mole of substance B. This means that we have 4A₂B
ii- we have one mole of substance A that is diatomic. This means that we have A₂
iii- we have one mole of substance B that is monoatomic. This means that we have B
Based on the above, for the products side, we have:
4A₂B + A₂ + B

3- Combining reactants and products parts:
Combining the reactants side (from part 1) with the products side (from part 2), we can find that the initial equation is as follows:
5A₂ + 5B .................> 4A₂B + A₂ + B

4- Balancing the equation:
Taking a look at the initial equation we reached in part 3, we will find that:
Number of moles of substance A in reactants = 2*5 = 10 moles
Number of moles of substance A in products = 2*4 + 2*! = 10 moles
SUBSTANCE A IS BALANCED
Number of moles of substance B in reactants = 5*1 = 5 moles
Number of moles of substance B in products = 4*1 + 1 = 5 moles
SUBSTANCE B IS BALANCED
Based on the above, the final balanced equation is the same as the initial equation reached in part 3:
5A₂ + 5B .................> 4A₂B + A₂ + B

Hope this helps :)

6 0
3 years ago
After studying weather, Beto bought a simple weather station and put it up in his yard. He was especially interested in wind and
Alex73 [517]

Incomplete question. The remaining part reads;

Choose the correct words or phrases to complete the sentences.

Global winds occur due to

<u>1. Choose...</u>

a. solar currents

b. convection currents

c. sea breezes

d. uneven heating

over a large area and this forms

2. Choose...

a. solar currents

b. convection currents

c. sea breezes

d. uneven heating

caused by cool and warm air.

Answer:

<u>1. d. uneven heating</u>

<u>2. b. convection currents</u>

Explanation:

1. What Beto should know is that as the earth moves and rotates around the sun, some parts of the Earth receive more sunlight and others less, which then leads to uneven heating over a large area of the earth.

2. This uneven heat then forms a convection current containing varying patterns of air spreading to various parts of the globe.

8 0
3 years ago
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