Answer:
Explanation:
It is called a single replacement. K is one of the few chemicals that can force Aluminum to take on electrons. The balanced equation is
AIBr3 +3K → 3KBr + AI
Answer:
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Explanation:
You need the specif heat capacities of both cobalt and lead.
- Specific heat of cobalt: 0.42 J/g.ºC
- Specific heat of lead: 0.13 J/g.ºC
When the two sheets reach the thermal equilibrium their temperatures are equal.
You can use the equations for the thermal heat to find the equilibrium temperature:
Thermal heat released by the hot sheet, lead:
- Q = 16.6 kg × 0.13J/g.ºC × (63ºC - T)
Thermal heat absorbed by the cold sheet, cobalt:
- Q = 5.78 kg × 0.42J/g.ºC × (T - 11ºC)
Equal the two equations to solve for T:
- 16.6 kg × 0.13J/g.ºC × (63ºC - T) = 5.78kg × 0.42J/g.ºC × (T - 11ºC)
I remove the units for easier handling:
- 135.954 - 2.158T = 2.4276T - 26.7036
Round to 2 significant figures: 35ºC ← answer
Answer:
Carbon is a soft, dull gray or black non-metal that you can scratch with a fingernail. Th density of carbon as graphite is 2.267 g/mL, which means it will sink in water. Chemical Properties: Carbon, as graphite, burns to form gaseous carbon (IV) oxide (carbon dioxide).
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Answer:
Atoms of the reactant(s) must equal the atoms of the product(s).
Explanation:
According to the Law of Conservation, all atoms of the reactant(s) must equal the atoms of the product(s).
As a result, we need to balance chemical equations. We do this by adding in coefficients to the reactants and/or products. The compound(s) itself/themselves DOES NOT CHANGE.