Answer:
The answer to your question is Q = 640.5 J
Explanation:
Data
Volume of water = 15 ml
density of water = 1 g/ml
Temperature 1 = T1 = 25°C
Temperature 2= T2 = 35.2°C
Specific heat = 4.186 J/g°C
Process
1.- Calculate the mass of water
Mass = density x volume
= 1 x 15
= 15 g
2.- Substitution
Q = mC(T2 - T1)
Q = 15(4.186)(35.2 - 25)
-Simplification
Q = 15(4.186)(10.2)
-Result
Q = 640.5 J
Answer:
Melting point
Explanation:
it's constant temperature at which the bonds of a solid Crystal lattice are broken down by overcoming the attractive forces converting it to liquid
The standard curve was done at the wavelength of 362 nm for uniformity. We can use this function to determine the concentration at any absorbance value. At A = 0.782, c is,
<span>A = (3.2 x 10^-1 M^-1)c
0.782 = </span><span>(3.2 x 10^-1 M^-1)c
c = 2.44 M
The concentration of the triiodide solution is 2.44 M.</span>
1 mole MgS2O3=24+2*32+3*16=136g
229g MgS2O3 = 229/136=1.6838 moles
Answer:
Sr 2+(aq) + SO42-(aq) → SrSO4(s)
Explanation:
<u>Step 1</u>: Write a properly balanced equation with states:
K2SO4(aq) + Srl2(aq) → 2KI(aq) + SrSO4(s)
<u>Step 2</u>: write the full ionic equation with states. Remember to keep molecules intact. Only states (aq) will dissociate, (s) will not dissociate
. This means SrSO4 won't dissociate.
2K+(aq) + SO42-(aq) + Sr 2+(aq) + 2I-(aq) → 2K+(aq) + 2I-(aq) + SrSO4(s)
<u>Step 3</u>: Balanced net ionic equation
Sr 2+(aq) + SO42-(aq) → SrSO4(s)