Depend on the amount of matter being measured
Answer:
Waves; wavelength; electromagnetic energy; ultraviolet light.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases.
Lightwave can be defined as an electromagnetic wave that does not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
Hence, sound and light are both found as waves, with a variety of wavelengths. The sun, a source of light waves specifically, releases a type of electromagnetic energy. It can be found as UVA or UVB types. These lights give off different levels of ultraviolet light, some of which can be harmful.
Additionally, the ultraviolet spectrum is divided into three categories and these are; UVA, UVB ,and UVC.
Answer:
a. 102.6g/mol
b. Rb⁺
Explanation:
a. The unknown base, XOH, <em>Where X is the alkali metal</em>, reacts with HCl thus:
XOH + HCl → H₂O + XCl
<em>Where 1 mole of the hydroxide reacts per mole of acid. </em>
Moles of HCl spent to reach the equivalence point are:
17.0mL = 0.017L ₓ (2.50mol / L) = 0.0425moles of HCl
As 1 mole of HCl reacts with 1 mole of base, moles of base are 0.0425 moles.
Molar mass of a compound is the ratio between mass in grams and moles of substance, that is:
4.36g / 0.0425mol =
<h3>102.6g/mol</h3>
b) Molar mass of OH is 17g/mol, thus, the molar mass of the alkali metal is:
102.6g/mol - 17g/mol = 85.6g/mol
The mass of Rb is 85.5g/mol, thus, the identity of the alkali metal is
<h3>Rb⁺</h3>
