Physical properties of toothpaste

Sunlight, when viewed through a prism or a diffraction grating, shows all of the colors of visible light. This is an example of a (A) bright line spectrum (B) continuous spectrum (C) infrared spectrum (D) visible spectrum (E) ultraviolet spectrum

What mass of zo32 must be diluted to a mass of?

The compound XCl is classified as Ionic if x represents the element?

A scientist has just developed a composite drug to fight seasonal allergies. What's the next step in the engineering process before the drug is released?

A boiler is used to heat steam at a brewery to be used in various applications such as heating water to brew the beer and sanitizing the brewing tanks. 73.0% of the heat produced by the boiler is used to create saturated steam at 12.

Bacteria are only found in decaying matter. A. True B. False

Which is considered a chemical mutagen? tanning beds tobacco X-rays precious metals

Combining 0.380 mol Fe2O3 with excess carbon produced 13.7 g Fe Fe2O3 + 3C → 2Fe + 3CO What is the actual yield of iron in moles? What is the theoretical yield of iron in moles? What is the percent yield?

When a hydrogen electron makes a transition from n=3 to n=1?

If two electrons have same number of protons but different number of neutrons can they be atoms of the same element?