Answer:it’s gamma rays are used for medicine to shrink problem cells
Explanation:
<span>Hydration can occur when one mole of sodium acetate trihydrate is heated. Sodium acetate or NaC2H3O2 3H2O contains three water molecules within each unit in the crystal. The corresponding amount of hydration energy is already released when sodium acetate absorbs water and is then converted to sodium acetate trihydrate.</span>
Answer:
You will find the mass of the pan and water but if the water got to its boiling temperature that mass may be a little bit off seeing as some of it may have evaporated
The location of reduction in an electrochemical cell is called the anode.
An electrochemical cell ( galvanic cell ) is generate electric energy from chemical reactions. In galvanic cell species ( for example zinc and zinc cations ) from one half-cell lose electrons ( oxidation ) and species from other half-cell ( for example copper and copper cations ) gain electrons ( reduction ). Electric current is generated due to the flow of electrons from the anode that undergoes an oxidation reaction to the cathode which has a reduction reaction in the circuit of an outer wire circuit.
to learn more about electrochemical cell
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First let us calculate the moles of K2Cr2O7 that was
supplied.
moles K2Cr2O7 = 0.0010 M * 0.0083 L = 8.3x10^-6 mol
From the chemical formula itself, we see that there are 7
O for every mole of K2Cr2O7 or 3.5 O2. Therefore:
moles O2 = 8.3x10^-6 mol K2Cr2O7 * (3.5 mol O2 / 1 mol K2Cr2O7)
moles O2 = 2.905x10^-5 mol O2
Calculating for the mass of O2 in mg:
mass O2 = 2.905x10^-5 mol O2 * (32 g / mol) * (1000 mg /
g)
mass O2 = 0.9296 mg
Therefore the chemical oxygen demand (COD) is:
COD = 0.9296 mg / (0.025 L)
<span>COD = 37.184 mg/L</span>