Molar mass NaOH = 23 + 16 + 1 => 40.0 g/mol
number of moles:
10.0 g / 40 => 0.25 moles
Volume in liters:
500.0 mL / 1000 => 0.5 L
M = n / V
M = 0.25 / 0.5
M = 0.5 mol/L
hope this helps!
Part A answer is C. - central idea
Part B answer is C. - supports central idea
Part A answer is D. - what the author thinks
Part B answer is A. - supports what the author thinks
Chlorophyll is a green molecule found in plants that absorbs sunlight during photosynthesis and converts it to energy. It's been said to help with blood detoxification, odor control, wound healing, gut health, energy, immune system support and cancer prevention.
<span>Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. </span>To calculate percent by mass, you need to determine two things: the mass of just the element, and the molar mass of the whole compound. We calculate as follows:
.10 g NaCl / g NaCl + Water = ( 10.0 g NaCl + x ) / (10.0 g + 255 g + x )
x = 18.33 g NaCl needed
Explanation:
Given that,
The density of mercury is 13.5 g/mL
The density of Bromine is 3.12 g/cm³
It is mentioned that Mercury and bromine have the same mass. Let d₁,d₂ are the density of Mercury and Bromine. V₁ and V₂ are their volumes. So,
![\text{density}=\dfrac{\text{mass}}{\text{volume}}](https://tex.z-dn.net/?f=%5Ctext%7Bdensity%7D%3D%5Cdfrac%7B%5Ctext%7Bmass%7D%7D%7B%5Ctext%7Bvolume%7D%7D)
![\text{mass}=\text{density}\times \text{volume}](https://tex.z-dn.net/?f=%5Ctext%7Bmass%7D%3D%5Ctext%7Bdensity%7D%5Ctimes%20%5Ctext%7Bvolume%7D)
Since, mass is same.
So,
![d_1V_1=d_2V_2\\\\\dfrac{d_1}{d_2}=\dfrac{V_2}{V_1}\\\\\dfrac{13.5}{3.12}=\dfrac{V_2}{V_1}\\\\4.32=\dfrac{V_2}{V_1}\\\\V_2=4.32\times V_1](https://tex.z-dn.net/?f=d_1V_1%3Dd_2V_2%5C%5C%5C%5C%5Cdfrac%7Bd_1%7D%7Bd_2%7D%3D%5Cdfrac%7BV_2%7D%7BV_1%7D%5C%5C%5C%5C%5Cdfrac%7B13.5%7D%7B3.12%7D%3D%5Cdfrac%7BV_2%7D%7BV_1%7D%5C%5C%5C%5C4.32%3D%5Cdfrac%7BV_2%7D%7BV_1%7D%5C%5C%5C%5CV_2%3D4.32%5Ctimes%20V_1)
Hence, the volume of bromine is more than that of mercury. It is 4.32 times of the density of mercury.