Chloral hydrate has the formula <span>C2H3Cl3O2
mass of carbon : 12
mass of Cl : 35.5
mass of hydrogen : 1
mass of oxygen : 16
So, molar mass of chloral hydrate = 2(12) + 3(1) + 3(35.5) + 2(16) = 165.5 gm
1 mole contains </span><span>6.02 x 10^23 molecules
Thus, mass of one molecule = 165,5 / (</span><span>6.02 x 10^23) = 2.75 x 10^-22 gm
therefore, mass of 500 molecules is equal to:
500 x 2.75 x 10^-22 = 1.37 x 10^-19 gm</span>
Answer:
I am not sure what was the passage but the relationship between clownfish and sea anemone is mutualism where they both benefit each other.
Answer:
237.80mL
Explanation:
Molarity of a solution can be calculated using the formula;
Molarity = number of moles (n) ÷ volume (V)
However, we first need to calculate the number of moles of Cu(NO3)2 by using the formula:
moles = mass/molar mass
Molar mass of Cu(NO3)2 = 187.56 g/mol
moles = 146.59 ÷ 187.56
moles = 0.782moles
Molarity = n/V
3.28 = 0.78/V
V = 0.78/3.28
V = 0.2378L
In milliliters (mL), 0.24 litres = 0.24 × 1000
= 237.80mL
Explanation:
They put five crickets in each of three identical containers. They s ... to 15°C, one to 20°C, and one to 25°C. Then they count the number of cricket chirps in each container
Answer:
Deshydrohalogenation
Explanation:
You are not providing options to answer, however, this can be answered without options.
Now, in the reaction we can see that we have an atom of Bromine in carbon 2, and in the product appears as NaBr. This means that the Br was substracted by elimination. It's an elimination because the final product do not have a substituent where the bromine was, (Like another nucleophyle such OH or another halide). If you look closely the final product, we can see that one hydrogen in carbon 3, is no longer there. So this electrophyle was also substracted, in this case, by a base (Such NaOH), so in this case, it's ocurring an elimination reaction via E2 (One step, bimolecular). So, as the final product has been substracted the nucleophyle and electrophyle, this treaction is a deshydrohalogenation (an atom of hydrogen and a halide were substracted). The mechanism of this, you can see it in the picture.