3 years ago

Energy cannot (blank) under ordinary conditions.

Chemistry

1 answer:

svlad2 [7]3 years ago

3 0

It is ..Change form

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How much heat is required to melt 20 g of gold at 1064.18 °C with a heat of fusion of 64 J/g *

andrew-mc [135]

Answer:

1280J are required.

Explanation:

Heat of fusion is defined as the amount of heat required to change its state from liquid to solid at its melting point at constant pressure.

As heat of fusion of gold is 64J/g, there are required 64J to melt 1g of gold at its melting point. The energy required to melt 20g is:

20g * (64J/g) =

1280J are required

6 0

3 years ago

What gasous product would you expect when water is drop over calcium carbide

wolverine [178]

Answer:

Ethyn gas ( acetylene gas )

Explanation:

All group II carbides react with water to form ethyn gas apart from beryllium which produces methane gas.

${ \sf{CaC_{2(s)} + 2H _{2} O_{(l)} → Ca(OH) _{2(s)} + C _{2} H _{2(g)} }}$

7 0

3 years ago

AT constant temperature, a gas is compressed from 5.5 L to 1 L. At 1 L, the pressure of the gas is 98.2 kPa. What was the origin

svet-max [94.6K]

We have that the original pressure of this gas is mathematically given as

P2=17.854 kPa

<h3>Boyle's law</h3>

Question Parameters:

AT constant temperature, a gas is compressed from 5.5 L to 1 L.

At 1 L, the pressure of the gas is 98.2 kPa

Generally the equation for Boyle's law is mathematically given as

P1V1=P2V2

Therefore

$P1=\frac{P2V2}{V1}\\\\P2=\frac{98.2*1}{5.5}$

P2=17.854 kPa

For more information on Pressure visit

brainly.com/question/25688500

7 0

3 years ago

I need help badly?? It's scince and I can't figure it out..

Art [367]

i did this! Your lucky :)

Hopefully this will help you out!

8 0

4 years ago

What is an acid? <br><br>Acid is that can move to a different forms!

laila [671]

Answer:

An acid is a substance that when dissolved in water produces hydroxonium ion as the only positive ion in water

Explanation:

HCL +H20=H3O + CL

6 0

3 years ago

Energy cannot __(blank)__ under ordinary conditions.

Energy cannot (blank) under ordinary conditions.