Ninety-nine percent of all the matter that can be observed in the universe exists as

A. gases.

B. plasmas.

C. liquids.

D. solids. Reset Selection

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What evidence supports a conservation law? A: 6 CO2 → C6H12O6 + 6 O2 B: 6 CO2 + 6 H2O + light → C6H12O6 + 6 O2 C: 6 H2O + light → C6H12O6 + 6 O2 D: 6 CO2 → 3 C6H12O6 + 3 O2

A car moves with an average speed of 45miles / hour. How long does the car take to travel 90miles?

Draw the most reasonable lewis structure of a molecule that contains a n atom, a c atom, and a h atom. include any formal charges if needed

Solid lithium hydroxide is used in space vehicles to remove exhaled carbon dioxide from the living environment by forming solid lithium carbonate and liquid water. 2 LiOH (s) + CO2 (g) - -> Li2CO3 (s) + H2O (l) If the space vehicle has 28.5.

In the reaction mgcl2 + 2koh mg (oh) 2 + 2kcl, if 3 moles mgcl2 are added to 4 moles koh what determines how much mg (oh) 2 is made

Based on the ionization energies of the alkali metals, which alkali metal would you expect to undergo the least exothermic reaction with chlorine gas? Express your answer as a chemical symbol.

An atom of a particular element is traveling at 1.00% of the speed of light. The de Broglie wavelength is found to be 3.31 * 10-3 pm. Which element is this? Prove it.

Is a whale a abiotic or biotic

If the half-life of hydrogen-3 is 11.8 years, after two half-lives the radioactivity of a sample will be reduced to one-half of the original amount. If the half-life of hydrogen-3 is 11.

If element X has 25 protons, how many electrons does it have?