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Lina20 [59]
3 years ago
13

The TV weather forecaster announces that one location has a 30% chance of rain tomorrow and a 35% chance of hail. What is the pr

obability that it will rain or hail in this location?
Chemistry
1 answer:
blondinia [14]3 years ago
6 0

Answer: 65%

Explanation:

When in probability and the outcome is mutually exclusive which means that either one or the other will happen then the probabilities of the events should be added up.

P(A or B) = P(A) + P(B)

P(Rain or Hail) = P(Rain) + P(Hail)

P(Rain or Hail) = 30% + 35%

P(Rain or Hail) = 65%

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When baking soda (NaHCO3) dissolves in water, it separates into a cation (positive ion) and an anion (negative ion). Give the ch
goldenfox [79]

Answer:

Na⁺ and HCO⁻₃

Explanation:

When baking soda is dissolve in water it fully ionized into positive and negative ions.

NaHCO₃  + H₂O  →  Na⁺ + HCO⁻₃

The Na⁺  than react with OH⁻ of water and produced NaOH while HCO⁻₃ react with H⁺ and produce H₂CO₃. This carbonic acid than break to produced carbon dioxide and water.

H₂CO₃ → H₂O + CO₂

Properties of baking soda:

It is odorless compound.

It is solid at room temperature.

It is used in medicine to cure the acidity of stomach.

It is used to make baking powder.

8 0
4 years ago
Can someone answer these will give brainliest
sukhopar [10]

Answer:

acid base --

Explanation:

i dont thimk im that smart lol sorry

6 0
3 years ago
How many moles of NO3 are there in 6.2g?
Nataliya [291]
6.2 divided by the mass number of NO3 is 0.1 moles. Anytime your trying to find the moles of something you divide it by the mass number of your combined elements.
3 0
3 years ago
Read 2 more answers
How to find molecular weight​
Nastasia [14]

Answer:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Explanation:

hope this helped

3 0
3 years ago
In electrophilic aromatic substitution reactions the hydroxyl group is an o p-director because?
Natalka [10]

In electrophilic aromatic substitution reactions the hydroxyl group is an o,p-director because: hydroxyl group donates the electron density to the ring by induction and destabilizes the meta sigma complex and  by resonance and it  stabilizes the ortho and para sigma complexes of aromatic ring .

Most ring activators have atoms with unshared electron pairs directly attached to a carbon atom of the benzene ring . For example, the — OH group has two pairs of unshared electrons on the oxygen atom , which will form a bond to a carbon atom of the benzene ring . Thus , the — OH group will be an activating group in electrophilic aromatic substitution reactions .

to learn more about electrophilic aromatic substitution reactions please click here ,

brainly.com/question/28286554

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5 0
2 years ago
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