. Circle the correct choice for each statement 1. The number of substances in a mixture (can - cannot) be varied, for a compound they (can - cannot). 2. The different substances in a mixture (can - cannot) be joined chemically; a compound (can - cannot). 3. Substances in a mixture (do - do not) keep their own properties. 4. Substances in a compound (can - cannot) be easily separated; in a mixture, they (can - cannot). 5. Examples of (mixtures - compounds) are air, sea water, and most rocks. 6. Examples of (mixtures - compounds) are water, salt, and sugar. 7. Compounds are made of elements and have a (physical – chemical) formula. 8. A (solvent - solute) is the substance that dissolves in another substance. 9. True or False: A mixture cannot have five substances. 10. True or False: In a suspension, a substance may sink to the bottom.

How can you tell if someone sent you a text message to your email instead of a email

For her science class, elaine is creating a presentation on weather in the united states. she wants to make the presentation beautiful and interesting by drawing simple cloud or wave shapes. which is the best way for elaine to draw these shapes?

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;