How many millilitres of 0.30 N NaOH are required to neutralize exactly 50.0 mL of 0.45 N H3PO4? (2 marks) (HINT: units of concentration are expressed in NORMALITY - N)

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

Stage in which a typical star has completely stopped fusion

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.