The correct answer is because sanitary pads and diapers are in direct contact with external genitalia for an extended period of time, a significant amount of VOCs or phthalates may be absorbed into the reproductive system.
Sanitary pads and diapers are made of synthetic plastic materials that can leach into the environment when used. The amounts of volatile organic compounds (VOCs) (methylene chloride, toluene, and xylene) and phthalates (DBP, DEHP, DEP, and BBP) found in sanitary pads and diapers were measured in this study. VOC and phthalate concentrations in sanitary pads varied by 5,900 and 130 times, respectively. VOC and phthalate concentrations in diapers varied by three and sixty-three times between brands. The VOC concentrations in sanitary pads and diapers were comparable to those in residential air. However, sanitary pads and diapers had significantly higher phthalate concentrations than common commercial plastic products.
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3BaO(s)+3Al(s)—3Ba(l) + Al2O3(s)
If you need it balanced.
Answer:
C₄H₈O₂.
Explanation:
- Firstly, we can calculate the no. of moles (n) of each component using the relation:
<em>n = mass/atomic mass,</em>
mol C = mass/(atomic mass) = (54.5 g)/(12.0 g/mol) = 4.54 mol.
mol H = mass/(atomic mass) = (9.3 g)/(1.0 g/mol) = 9.3 mol.
mol O = mass/(atomic mass) = (36.2 g)/(16.0 g/mol) = 2.26 mol.
- To get the empirical formula, we divide by the lowest no. of moles (2.26 mol) of O:
∴ C: H: O = (4.54 mol/2.26 mol) : (9.3 mol/2.26 mol) : (2.26 mol/2.26 mol) = 2: 4: 1.
<em>∴ Empirical formula mass of (C₂H₄O) = 2(atomic mass of C) + 4(atomic mass of H) + 1(atomic mass of O) =</em> 2(12.0 g/mol) + 4(1.0 g/mol) + (16.0 g/mol)<em> = 44.0 g/mol.</em>
∴ Number of times empirical mass goes into molecular mass = (88.0 g/mol)/(44.0 g/mol) = 2.0 times.
∴ The molecular formula is, 2(C₂H₄O), that is; <em>(C₄H₈O₂)</em>
Answer:
<h2>The answer is 570 g</h2>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume of gold = 30 cm³
density = 19 g/cm³
The mass is
mass = 19 × 30
We have the final answer as
<h3>570 g</h3>
Hope this helps you
It tells you the ratio between the two of them.mass(weigh) and volume (takes up space). compares other substances with the amount per unit size of the substance
