Answer:
There are 3 isotopes of the element hydrogen.
Explanation:
hydrogen, deuterium, and tritium.
Explanation:im not really sure about this one but i think it is either c or b
ANSWER:C im pretty sure.sorry if wrong
Corroding iron. The reason why iron corrodes is that it reacts with the oxygen in the air to create iron oxide which is what we call rust. when iron turns to rust, the chemical identity of the iron changes.
when you break ice, the ice is still ice. that water did not change into something else. when you run a current through copper, the electrons in the copper move due to the voltage but the copper is not changing. After the circuit stops, the copper wires are still made out of copper (the copper did not undergo a chemical change). When you melt gold, the gold is only going from solid form to liquid form. The gold has not changed chemically, it just underwent a phase change.
I hope this helps. Let me know if anything is unclear.
Answer:
a chemical change can not be reversed but a physical change can be reversed
Explanation: hope this helps
Answer:
The answer to your question is 1.46 g of Cl₂
Explanation:
Data
mass of Cl₂ = ?
mass of NaCl = 2.4 g
Chemical reaction
2Na + Cl₂ ⇒ 2NaCl
Process
1.- Calculate the molar mass of chlorine and sodium chloride
Molar mass Cl₂ = 2 x 35.5 = 71 g
Molar mass of NaCl = 23 + 35.5 = 58.5 g
2.- Use proportions to solve this problem
71g of Cl₂ --------------------- 2(58.5g) NaCl
x --------------------- 2.4 g
x = (2.4 x 71) / 2(58.5)
x = 170.4 / 117
x = 1.46 g of Cl
