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ruslelena [56]
3 years ago
9

Joe, a hiker, stands at the top of a hill on a trail above the ocean. Joe's friend Dave is just starting out at the trailhead, w

hich is at the beach.
Which statement about this scenario is accurate?

The air Joe is breathing is denser than the air at sea level.
The air pressure is higher where Joe is than where Dave is.
If Joe keeps going up, air pressure will continue to decrease.
The air Joe is breathing is denser than the air Dave is breathing.
Chemistry
2 answers:
Anastaziya [24]3 years ago
7 0

Answer:

C. If Joe keeps going up, air pressure will continue to decrease.

timofeeve [1]3 years ago
4 0
C hope this helps and remember keep trying school is not easy
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HBr can be added to alkenes in either the absence or presence of peroxides (producing either the Markovnikov or the anti-Markovn
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Answer:

1) 2-bromobutane

2) 1-bromobutane

Explanation:

In the HBr reaction, we will have a <u>markovniknov reaction</u> due to the <u>carbocation formation</u>. The Br- then would be added in the <u>most substituted</u> carbon of the double bond.

In the HBr/peroxide reaction we have the opposite case: an <u>anti-markovnikov reaction</u>. Therefore the Br- would be added in the <u>least substitued</u> carbon of the double bond.

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Directions. Carefully review the question. Use the following choices to answer 1 - 10.
IceJOKER [234]
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Write the empirical formulas of the following compounds: (a) Al2Br6, (b) Na2S2O4, (c) N2O5, (d) K2Cr2O7, (e)H2C2O4.
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Answer:1. AlBr_3

2. NaSO_2

3.N_2O_5

4. K_2Cr_2O_7

5. HCO_2

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

1. Al_2Br_6 has empirical formula of AlBr_3

2. Na_2S_2O_4 has empirical formula of NaSO_2

3.N_2O_5 has empirical formula of N_2O_5  

4. K_2Cr_2O_7 has empirical formula of K_2Cr_2O_7

5. H_2C_2O_4 has empirical formula of HCO_2  

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Which is made up of only one type of atom?
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C - an element is only a single material so it is the option made of only once type of atom
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Please answer!! If you're not 100% sure on an answer, you can tell me.
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