Yeah I can help I'm an A student in science
Answer:
Ni
Explanation:
An active metal is a highly reactive metal. Active metals are found high up in the activity series.
Active metals react with other metals that are lower than them in the activity thereby displacing the lower metals from a solution of their salts. This is what may have happened in the other two reactions.
Ni is the most active metal listed in the question since it can react a compounds with Pb(NO3)2(aq) to liberate Pb metal.
Answer:
6.5
Step-by-step explanation:
We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.
M_r: 187.56 18.02
Cu(NO₃)₂·nH₂O ⟶ Cu(NO₃)₂ + nH₂O
m/g: 7.0 4.3
1. <em>Moles of Cu(NO₃)₂
</em>
Moles of Cu(NO₃)₂ = 4.3 g × (1 mol/187.56 g)
Moles of Cu(NO₃)₂ = 0.0229 mol
2. <em>Mass of H₂O
</em>
Mass of Cu(NO₃)₂·nH₂O = mass of Cu(NO₃)₂ + mass of H₂O
7.0 = 4.3 + x
7.0 - 4.3 = x
2.7 = x
3. <em>Moles of H₂O
</em>
Moles of H₂O = 2.7 g × (1 mol/18.02 g)
Moles of H₂O = 0.150 mol
4. <em>Value of n
</em>
The molar ratio is 1 mol (NO₃)₂ = n mol H₂O
n = moles H₂O/moles Cu(NO₃)2
n = 0.150/0.0229
n = 6.5
This answer does not make sense, because the maximum value of n in hydrated copper(II) nitrate is 6.
Answer: 0.027837938656318
Explanation: Because 1 grams FeO is equal to 0.013918969328159 mole.
Answer:
The independent variable in on the x-axis, and the dependent variable is on the y-axis.
Explanation:
The independent variable belongs on the x-axis (horizontal line) of the graph and the dependent variable belongs on the y-axis (vertical line). The x and y axes cross at a point referred to as the origin, where the coordinates are (0,0).If you are confused, please check out this website talking more in-depth about graphing!
https://www2.nau.edu/lrm22/lessons/graph_tips/graph_tips.html#:~:text=The%20independent%20variable%20belongs%20on,are%20(0%2C0).