8820 and 0.0882 have three sig figs
When a number has zeros in it I struggled a lot to determine if it what a sig fig or not. This is how I remember it:
If a zero is a sandwich between normal numbers it IS a sig fig
Zero's after the decimal ARE sig figs
***IMPORTANT! There is an exception to this one which I'll talk about next :)
Leading zeros (I believe that is what they are called) are NOT sig figs. This would be like the zeros in the following numbers:
0.2
0.03
0.000000000000000000006
If there are zeros after normal numbers and there is NO DECIMAL it is NOT a sig fig. This would be like the zeros in the following numbers:
630
3, 000
536, 329,600,000
Take a look at the other numbers:
0.8820 <<<This has 4 sig. figs.
882.0 <<<This has 4 sig. figs.
***Remember that if there is a pure decimal the zero in front of the decimal is NOT a sig fig and just a place holder. It isn't necessary and can always be taken away
Hope this made sense and helped!!!
Answer:
1) Fe³⁺
2) Al³⁺
3) Pb²⁺
Explanation:
Because all of the metal ion concentrations are the same, the order that they precipitate will be dependent on the 
values of each individual precipitate. The lower the , the less OH⁻ needed in solution to precipitate.
The three values are
= 2.6 x 10⁻³⁹ for Fe(OH)₃,
= 1.9 x 10⁻³³ for Al(OH)₃
= 1.4 x 10⁻¹⁵ for Pb(OH)₂
This means that the ions will precipitate in the following order Fe³⁺ then Al³⁺ then Pb²⁺
Note: if too much OH⁻ is added Al³⁺ will redissolve into solution because of the formation of the soluble complex Al(OH)⁻₄ (
= 1.1 x 10³³)
The negative impact of the hydroelectric dam is local drought and massive flood by dam breakage.
The hydroelectric dam is the local water storage body that is used to convert the energy of the water to electrical energy. The plants are a huge source of electricity.
<h3>What is the dam's negative impact?</h3>
The dam is prepared in order to collect the local water in the bodies for the production of electricity. The collection of water required a larger force and pressure-bearing ability, thus dams are constructed with high-quality material.
The dams provide hydroelectricity, but the collection of water has been caused by the local drought conditions in the area. The dam breakage leads to massive floods as well.
Learn more about hydroelectric dam, here:
brainly.com/question/25761749
Its to protect the cell from its surroundings, its selectively permeable to ions and organic molecules
Answer:velocity of molecules within a body
Explanation:
Temperature is defined as the average kinetic energy of the molecules of a body. The kinetic energy of a body depends on the velocity of the molecules of the body. When the temperature of a body increases, its particles acquire greater kinetic energy and move at higher velocity. Hence temperature depends on the velocity of the molecules of a body while heat is a form of energy.
