Answer:
B) a pipette
Explanation:
Also known as a graduated pipette, they vary in volume, with most measuring between 0 and 25.0 mL. A small pipette can be used for precise measurement of fluids.
Answer:
Explanation:
Heat of vaporization is the amount of heat required to convert 1 mole of liquid substance to its vapor form.
Given :
Amount of heat required for 1 mol of water = 40.7 kJ/mol
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number of particles.
1 mole of weighs = 18.02 g
Thus we can say:
18.02 g of requires heat = 40.7 kJ
Thus 5.6 g of requires heat = (1kJ=1000J)
Thus the energy required to completely vaporize 5.6 g of water at 100.°C is
Answer: The bubbles produced are most likely due to oxygen.
Explanation:
Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.
The balanced chemical reaction for photosynthesis is:
Lewis structures have the distinct characteristic of electron dots drawn around an atom. They represent the valence electrons or the electron located at the outermost shell of the atom that takes part in chemical reactions.
For neutral compounds, they simply add the valence electrons of the individual atoms. This is because it has no charge. Whatever the net charge of the compound is, that would be added, as well.
For example, the HCl atom's valence electrons would be 1 + 7 + 0 = 8. Therefore, you draw 8 electron dots around the HCl compound.
For p<span>rincipal quantum number n=4:
1) a</span><span>zimuthal quantum number (l) can be l = 0...n-1:
l = 0, 1, 2, 3.
</span><span>The azimuthal quantum number determines its orbital angular
momentum and describes the shape of the orbital. </span><span>
2) m</span>agnetic quantum number (ml) can be ml = -l...+l.
ml = -3, -2, -1, 0, +1, +2, +3.
<span>Magnetic quantum
number specify orientation of electrons in magnetic field and number of electron states (orbitals) in subshells.
3) t</span>he spin quantum
number (ms), is the spin of the electron.
ms = +1/2, -1/2.