Heat
gained or loss in a system can be calculated by multiplying the given mass to the
specific heat capacity of the substance and the temperature difference. It is
expressed as follows:<span>
Heat = mC(T2-T1)
When two objects are in contact,
it should be that the heat lost is equal to what is gained by the other. So, the heat released by the lead is equal to the heat that is absorbed by the water.
</span>Heat = mC(T2-T1) = 50.0 mL (1.00 g/mL) (4.18 J/g °C) (20 °C - 18 °C) = 418 J<span>
</span>
Answer:
MedlinePlus Drugs Information
Explanation:
Promethazine is in a class of medication called phenothiazines
Answer:
Water acts as a base in the presence of a strong acid
Explanation:
Water,being an amphoteric compound, can act both as an acid and as a base.
In the presence of an acid , water acts as a base but in the presence of a base, water acts as an acid.
As distance increases gravitational force decreases
and as distance decreases gravitational force increases
Therefore, it is inversely proportion.
Chlorocyclohexane has the molecular formula of C₆H₁₁Cl. We can use simplified atomic masses for each atom to find the total molecular weight.
6C = 6 x 12 g/mol = 72 g/mol
11H = 11 x 1 g/mol = 11 g/mol
1Cl = 1 x 35 g/mol = 35 g/mol and 1Cl = 1 x 37 g/mol = 37 g/mol.
We can add the masses of each atom to get two different molar masses, one for each chlorine isotope.
72 + 11 + 35 = 118 g/mol with ³⁵Cl.
72 + 11 + 37 = 120 g/mol with ³⁷Cl.
The two molecular ions will therefore be 118, 120.
The relative percentages of each molecular ion will be solely dependent on the ratio of chlorine isotopes which we are told is roughly 76:24. Therefore, the ratio of molecular ions is:
118, 76 %.
120, 24 %.
