All categories

3 years ago

When you burned copper, the product copper

2 answers:

8 0

The other reactant besides copper has to be oxygen as the product is copper oxide. We already know about copper being the first reactant then all that’s left is ‘oxide’ which sounds like oxygen.

MatroZZZ [7]3 years ago

6 0

Answer:

Oxygen.

Explanation:

The copper must be combined with something in the air.

You might be interested in

A bond where electrons are transferred from a cation to an anion is called a (n) ___________bond.\

emmasim [6.3K]

When elements transfer electrons from a cation and an anion it called ionic bond.

6 0

3 years ago

A sound wave has a wavelength of 0.7 miles and a frequency of 500 Hertz what is the speed

yaroslaw [1]

speed equals wavelength times frequency so

.7 x 500 = 350

4 0

3 years ago

suppose you wanted to compare two different stain removers to learn which one was better at removing food stains from clothing.

Dovator [93]

Answer:

The amount/type of stain

Explanation:

You would want to ensure that the stain was the same in both samples.

8 0

1 year ago

I2(g) + Cl2(g)2ICl(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.62 mol

galina1969 [7]

Answer:

The change in entropy of the surrounding is -146.11 J/K.

Explanation:

Enthalpy of formation of iodine gas = $\Delta H_f_{(I_2)}=62.438 kJ/mol$

Enthalpy of formation of chlorine gas = $\Delta H_f_{(Cl_2)}=0 kJ/mol$

Enthalpy of formation of ICl gas = $\Delta H_f_{(ICl)}=17.78 kJ/mol$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H_{rxn}=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]$

For the given chemical reaction:

$I_2(g)+Cl_2(g)\rightarrow 2ICl(g),\Delta H_{rxn}=?$

The equation for the enthalpy change of the above reaction is:

$\Delta H_{rxn}=[(2\times \Delta H_f_{(ICl)})]-[(1\times \Delta H_f_{(I_2)})+(1\times \Delta H_f_{(Cl_2)})]$

$=[2\times 17.78 kJ/mol]-[1\times 0 kJ/mol+1\times 62.436 kJ/mol]=-26.878 kJ/mol$

Enthaply change when 1.62 moles of iodine gas recast:

$\Delta H= \Delta H_{rxn}\times 1.62 mol=(-26.878 kJ/mol)\times 1.62 mol=-43.542 kJ$

Entropy of the surrounding = $\Delta S^o_{surr}=\frac{\Delta H}{T}$

$=\frac{-43.542 kJ}{298 K}=\frac{-43,542 J}{298 K}=-146.11 J/K$

1 kJ = 1000 J

The change in entropy of the surrounding is -146.11 J/K.

4 0

3 years ago

What is the charge on an atom after it gains two electrons during the formation of a bond?

scoundrel [369]

Answer:

negative or neutral

Explanation:

electrons have a negative charge

the atom can be balanced by the negative charge if it was at two protons before

6 0

3 years ago

Read 2 more answers