24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. What is 18-karat gold considered a mixture rather than a pure substance?

314 ounces. Based on the tiles below, what is the mass of the pumpkin in kilograms?

When two atoms have the same number of protons but different numbers of neutrons, these atoms are different isotopes of the same element. Question 15 options: ion neutron isotopes electron

Which of the following intermediates of intermediate filament assembly is polar? Dimer Tetramer Octamer Intermediate filament bundle None, intermediate filaments are always apolar

Balance the equation for the formation of ammonia from hydrogen gas and nitrogen gas using a set of the lowest possible integer coefficients. what is the coefficient in front of ammonia, nh3, in the balanced equation? n2 (g) + h2 (g) → nh3 (g)

What Is the number of photons in one J of red light (650 nm) greater than, equal to, or less than the number of photons in one J of blue light (450 nm) ?

The data below were collected for the following reaction at 500 ∘C: CH3CN (g) →CH3NC (g) Time (h) [CH3CN] (M) 0.0 1.000 5.0 0.794 10.0 0.631 15.0 0.501 20.0 0.398 25.0 0.

How do i convert 3.00 moles H2 to molecules?

How can you use the chemical formulas for sucrose (C6H, 20,) and rust (Fe, O,) to classity them ionic or molecular compounds?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.

Which can associate a suspect and the firing of a gun? (its not b) A) markings on the gun's exterior B) markings on the casing C) markings on the bullet D) powder residues