<h3>Answer:</h3>
The mass of water required is 50.2 g
<h3>Explanation:</h3>
- Quantity of heat of a substance is calculated by multiplying the mass of a substance by the specific heat capacity and the change in temperature.
That is;
Q=m×c×ΔT
In this case, water is used to cool a metal, therefore, water will gain heat while the metal will lose heat.
Heat gained is equivalent to heat lost
Heat gained by water = Heat lost by the metal
Step 1: Heat lost by the metal
Mass of the metal = 50.0 g
Specific heat capacity of metal = 0.60 J/g°C
Change in temperature (ΔT) = 70°C
Heat lost by the metal = 50 g× 0.6 × 70
= 2100 Joules
Step 2: Heat gained by water
Mass of water = x g
Specific heat capacity of water = 4.18 J/g°C
Temperature change = 10 °C
Heat gained by water = x g × 4.18 × 10
= 41.8x joules
Step 3: Mass of water
Heat gained by water = heat lost by the metal
41.8x = 2100
x = 50.239 g
= 50.2 g (1 d.p)
The mass of water is 50.2 g
Answer: Gold act as cathode.
Explanation:
Standard potential for an electrochemical cell is given by:
= standard electrode potential =
The 
values have to be reduction potentials.
Reduction potentials for given elements
The element Be with negative reduction potential will lose electrons undergo oxidation and thus act as anode.The element Au with positive reduction potential will gain electrons undergo reduction and thus acts as cathode.
Cathode : 
Anode : 
Thus gold act as cathode.
Answer:
The answer is
21.5 L
.
So, start with the balanced chemical equation for the decomposition of hydrochloric acid
2
HCl
→
H
2
+
Cl
2
Notice that you have a
2:1
mole ratio between
HCl
and
Cl
2
, which means that every 2 moles of the former will produce 1 mole of the latter. The number of moles of
HCl
you have is.
Explanation:
I don't know if that is but I try my best just correct me if I'm wrong thank you!!
Answer:
In humans, up to ten different proteins can be traced to a single gene. Proteome: It is now estimated that the human body contains between 80,000 and 400,000 proteins. However, they aren't all produced by all the body's cells at any given time. Cells have different proteomes depending on their cell type.
Explanation:
Answer: Peter is a Field Officer and Jessica is a Lab Officer
Explanation:
For Plato it should be, Peter is a "Field officer" because he's going into the fiend of the crime scene to find his evidence
And Jessica is a "Lab officer" because she stay's in the lab to analyze the evidence brought to her by Peter
