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Lady_Fox [76]
3 years ago
10

Which statement best describes why rate laws are important?

Chemistry
1 answer:
snow_tiger [21]3 years ago
6 0

Answer:

B

Explanation:

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Which one has 3 covalent bonds nh3 . h2s. ch4.co.co2​
Bess [88]

NH3 has three covalent bonds

H-N-H

   H

h2s has 2

ch4 has 4

co has 2

co2 has 4

7 0
2 years ago
Please help ASAPPPPP
inessss [21]
30 grams of CO2 … that’s the answer but brainly wants 20 words

4 0
2 years ago
This scientist led a series of experiments that used high speed lightweight atoms called alpha particles to bombard very thin pi
ss7ja [257]

Answer:

B. Ernest Rutherford

Explanation:

Ernest Rutherford was a renown Physicist and a Physics Nobel price winner. In 1911 he proposed the planetary model of atom. When the experiment were conducted he proposed that the atom had a charged nucleus and are surrounded by electrons. This finding was the basis for subsequent studies on radioactivity.

3 0
3 years ago
 how are subscripts determine the formula of ionic and covalent compounds ?
RideAnS [48]

Answer:

To determine the correct subscripts in a chemical formula, you have to solve how many atoms you need to balance the charge.

For example if I had the compound Calcium Fluoride I would look at the periodic table and see that Calcium's ionic formula is

Ca2+

. How do I know this? Well all elements want to have 8 valance electrons so they can be stable(happy). Seeing that Calcium has 2 valance electrons it is going to give away 2 electrons because that is easier than gaining 6 to be happy. Since Calcium has given away 2 electrons it has two more protons than electrons. We know that Protons have a Positive charge, Electrons have Negative charge, and the number of electrons is equal to the atomic number of an element in its pure non-ionic state. (Meaning it doesn't have a positive or negative charge; it is balanced.)

So if calcium gave away two electrons, it will have two more protons than an electron giving it a (2+) charge. The same process can be applied to Fluoride. Since fluoride is one to the left of the noble gases(group 18 or 8A) on the periodic table we know that it has 7 valance electrons because it is in group 7A or 17.

Knowing that we have 7 electrons the fluoride atom will gain an extra electron. Since the fluoride atom gained an extra electron it will have one more negative charge than a positive making it a ^(−)ion.

So you know that Calcium has a 2+ charge and that fluoride has a 1- charge, you then need these ions to balance out. So you need two fluorine atoms with a 1- ions to balance out the 2+ ion of calcium. Your final answer would be

CaF2

because you need two fluorine atoms to balance out the 2+ charge of the calcium.

Final Tip: Determine the charges then inverse the charges, remove the positive and negative superscipts, and write the charge numbers as a sub script. Ie. Calcium Fluoride

Ca2+ and F−

inversing and removing the charge signs would give you

4 0
3 years ago
Isotopes with unstable nuclei are_______and are called _______.
Inga [223]

Answer:

Radioactive and are often called radioisotopes

8 0
2 years ago
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