Explanation:
Because they share a similar composition, similar chemicals affect their structures in positive or negative ways. For example, fluoride – a staple in many dental practices – strengthens both enamel and eggshells and helps protect them from acids. Acids weaken and break down both substances. Scientists find this particularly concerning given that the ocean is growing increasingly acidic. They fear this may weaken the eggs of some marine species and harm their chance of survival. Most dentists recommend limiting aggressively acidic foods and beverages such as soft drinks.
Explanation:
A pinhole camera, as name suggests, is a camera has no lens. is a light- proof box,small hole on 1 side, light thru one side. projects an inverted pic which is known as an abscura effect....
Answer:
1.6*10^(-10) M
Explanation:
pOH = 9.8
[OH-]=10^{-log(pOH)} = 10^(-9.8) = 1.6*10^(-10)
Use Ideal Gas equation since values are given in Pressure (P), Volume (V), Temperature (T).
P V = n R T ; n= PV / RT
You can't use 1 mole= 22.4 L equation. Temperature and pressure values are not standard. ( 1 atm, 0
To choose the value of R ( gas constant), check out the units of other values in the equation. They are in atm,liter, kelvin, and mole. So, its value is 0.082 L atm/ K mol.
P= 0.97 atm
V= 35.83 * 10 ⁻³ L (conversion from ml to, just multiplied by 10 ⁻³ )
R= 0.082 L atm/ K mol
T= (25.3 + 273) K ( recall Kelvin = Celcius + 273; K= °C + 273<span>)
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Substitute values into equation of n= PV / RT
n= (0.97 atm) (35.83 * 10 ⁻³ L) / (0.082 L atm/ K mol) (298.3 K)= 0.014 mole
The answer is 0.014 mole
The answer is labels on lead-based paint
Lead is highly toxic metal and it is very strong poison. Lead poising takes place when lead builds up in the body. A little amount of lead can also cause various health problems.
Labels on lead-based paint do not prevent lead poisoning as much as advised to not using such product.
Instead of using lead-based paint, people could use safer products such as titanium-white based paint, which is proved to be less toxic.
Thus, option (A) is correct answer i.e. labels on lead-based paint is not among the current strategies which is used to prevent lead poisoning.
