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RUDIKE [14]
3 years ago
7

What days did the Catholic Church h celebrate with fireworks

Chemistry
2 answers:
andrew-mc [135]3 years ago
8 0
They used fireworks in hundreds of Saints' days celebrations to bring a "magical" touch, during the Renaissance many innovations were made in the field of pyrotechnics.
inessss [21]3 years ago
7 0

Answer:

ok

Explanation:

The Catholic Church used to celebrate Saint´s days with firework as a way to manipulate the ignorant people to bring a touch of officially sanctioned  magic.

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Explain in words what is happening in each chemical equation.
Masteriza [31]

Answer:

Ammonia and oxygen without catalyst | NH3 + O2 → N2 + H2O. With supply of heat, ammonia reacts with oxygen and produce nitrogen gas and water as products. Nitrogen of ammonia is oxidized to nitrogen gas from -3 oxidation state to 0 oxidation state.

Explanation:

4 0
3 years ago
The speed of someone running 5 miles in 45 minutes
makkiz [27]

Answer:

9 is the answer

Explanation:

because u need to divide 45 from 5 which is 9

3 0
3 years ago
Read 2 more answers
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Kryger [21]

Answer:

<em>The correct option is b. new species make the environment less suitable for previous ones.</em>

Explanation:

In ecology, succession can be described as the changes in a species structure over a period of time. In a community, newer species tend to have better characteristics and adaptations to survive in a community as compared to the older ones. As a result, the new species begin to take over the land and the older ones gets removed. It is due to ecological succession that climax communities are formed from pioneer species.

4 0
3 years ago
If 6.35 g of cu(no3)2 is dissolved in water to make a 0.750 m solution, what is the volume of the solution (in ml)?
miv72 [106K]
First, we need to find out how many moles we have of Cu ( NO_{3} )_{2} if we are given 6.35g.

We need to calculate the molar mass of the molecule:

Cu: 63.546g
N: 14.01g * 2 = 28.02g
O: 15.999g * 6 = 95.994

Add them together to get: 187.56g

So now we need to find the number of moles we are given. This can be done by setting up a multiplication equation and cancelling the units:

\frac{1mole}{187.56g}* \frac{6.35g}{1}=0.034 mol _{Cu( NO_{3} )_{2}   }

So now that we know the number of moles that we have, we can use the molarity equation to find the volume of the solution. The molarity equation is:

Molarity= \frac{moles}{Liters}

So since we are given the molarity in the equation (0.750 M), we can plug in the molarity and moles to find the volume of the solution:

0.750= \frac{0.034mol}{volume(L)}

volume(L)=0.04533L

So now we know that the volume is 0.04533 Liters; however the question asks for the answer in milliliters. To do this, we must multiply by 1000:

\frac{0.045L}{1} * \frac{1000mL}{1L}=45.33mL

So the volume of the solution (<em>in mL</em>) is 45.33 mL.
7 0
3 years ago
Carbon dioxide and water vapor help to prevent _______ from escaping from Earth
kotykmax [81]
Heat. Energy in a more general way.
8 0
4 years ago
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