A model that places earth in the center and has the sun, planets, and other objects orbiting the earth.
Explanation:
The geocentric model is a model that places earth in the center and has the sun, planets and other objects orbiting the earth.
- Based on the geocentric model of the earth, other planetary bodies revolves round the earth.
- The heliocentric model is a stark contrast of the geocentric model.
- In the heliocentric model, the sun is at the center of the solar system.
- This model is now known to be correct.
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The air pressure is a measure of the pressure of the air. The vapour pressure of a liquid, say, water, is a function of its temperature and does not depend on the air pressure. ... Its vapour pressure is higher than atmospheric pressure so its temperature is higher than the boiling point of water.
Answer:
1 zinc
Explanation:
zinc has a +2 charge, and Cl has a -1 each, so one zinc is enough to stabilized the molecule
Answer:
Mass = 76.176 g
Explanation:
Given data:
Mass of lead(II) chloride produced = 62.9 g
Mass of lead(II) nitrate used = ?
Solution:
Chemical equation:
Pb(NO₃)₂ + 2HCl → PbCl₂ + 2HNO₃
Number of moles of lead(II) chloride:
Number of moles = mass/molar mass
Number of moles = 62.9 g/ 278.1 g/mol
Number of moles = 0.23 mol
Now we will compare the moles of lead(II) chloride with Pb(NO₃)₂ from balance chemical equation:
PbCl₂ : Pb(NO₃)₂
1 : 1
0.23 : 0.23
Mass of Pb(NO₃)₂:
Mass = number of moles × molar mass
Mass = 0.23 mol × 331.2 g/mol
Mass = 76.176 g
The strong base will be dissociated completely into the aqueous solution. The pOH of the solution can be determined by the concentration of the hydroxide ion. The strong bases have lower pOH value.
