Ruben wants to determine if listening to different types of music will have an effect on a person's pulse his hypothesis states that if people listen to rap music their pulse will increase more than if they listen to other types of music ruben takes each participants pulse before during and after listening to 30 minutes of rap music he has his mother listen to rock music his sister listen to classical music and his friend listen to rap music from data collected h determine the rap music raise a person post the most 1.identify the independent and dependent variables 2. despite the results this is not able to support ruben hypothesis suggest specific improvements that will make the experiment test the given hypothesis explain why these changes are improvements

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.