Answer:
Explanation:
A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole camera – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
Answer:
If hydrochloric acid is a polar covalent compound, explain why in aqueous solution it conducts current similarly to an ionic compound.
This occurs because the current is transmitted by the charges of its atoms.
Explanation:
Hydrochloric acid is a compound that is made up of atoms with partial charges, which means that it is a polar molecule. H atoms have a positive partial charge, while Cl atoms have a negative charge, making the molecule as a whole have a neutral charge.
Being a dipole compound, water can dissolve molecules of this type, separate anions and cations. When atoms are separated from these molecules they release ions. In the case of HCl, being an acid, H+ and Cl- ions are released. This separation of charges causes electric current to be conducted.
Earth climate has stayed same thougout the past
Answer:
0.0102 moles Na₂CO₃ = 1.08g of Na₂CO₃ are necessaries
Explanation:
<em>Based on the reaction</em>
CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃
<em>1 mole of CaCl₂ reacts per mole of Na₂CO₃</em>
<em>calculate how many moles of CaCl2•2H2O are present in 1.50 g...</em>
To solve this question we must find the moles of CaCl2•2H2O using its molar mass (147.0146g/mol). These moles = Moles CaCl₂ = Moles of Na₂CO₃ necessaries to reach sotoichiometric quantities. To find then the mass we must use molar mass of Na₂CO₃ (105.99g/mol):
<em>Moles CaCl₂.2H₂O:</em>
1.50g * (1mol / 147.0146g) = 0.0102 moles CaCl₂.2H₂O = 0.0102moles CaCl₂
<em>Moles Na₂CO₃:</em>
<h3>0.0102 moles Na₂CO₃</h3><h3 />
<em>Mass Na₂CO₃:</em>
0.0102 moles * (105.99g / mol) =
<h3>1.08g of Na₂CO₃ are present</h3>
From looking over the graph, I would say the second option, "Marsha earns the most money per item sold because her line increases at a faster rate than Dreya's." Hope this helps, have a BLESSED day! :-)
