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11111nata11111 [884]
3 years ago
14

The introduction of synthetic fertilizers and chemical pesticides to farming date back to the __________

Chemistry
1 answer:
laiz [17]3 years ago
4 0

Answer:

Humans started to use pesticides dating back to before 2000 BC.

Hope this helps ^-^

Explanation:

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4. Do you think there is a change in energy as the fireworks travel from the ground
Andru [333]
Yes when a firework goes into the sky it releases chemical potential energy which is then changed into kinetic energy
4 0
2 years ago
Name the following covalent compound:
mote1985 [20]

Answer:

Pentasulfur nonanitride.

Explanation:

In order to name a compound properly, we need to identify the type of a compound we have. The given compound consists of two non-metals, sulfur and nitrogen. This implies that we have a covalent compound in contrast to an ionic compound which consists of a metal and a non-metal.

To name a molecular/covalent compound, we should use prefixes stating the number of atoms we have. In this case, we have 5 sulfur atoms. The prefix for 5 is 'penta'. That said, we have 'pentasulfur' as our beginning of the name.

We also have 9 nitrogen atoms. The second atom in the molecular formula would have an ending of '-ide', so we expect to have 'nitride'. Adding a prefix for 9, we'd have 'nonanitride'.

Putting everything together, the name is pentasulfur nonanitride.

Some common prefixes:

mono – one (we don't state mono for the first atom, e. g., we would name CO as carbon monoxide instead of monocarbon monoxide);

di – two;

tri – three;

tetra – four;

penta – five;

hexa – six;

hepta – seven;

octa – eight;

nona – nine;

deca – ten.

Notice that 'decanitride' would be correct in case you had 10 nitrogen atoms, similarly, tetra and hexa stand for 4 and 6 instead of 5 given sulfur atoms.

6 0
3 years ago
State two quantative physical properties that change when antifreeze is dissolved in water
Nonamiya [84]
It changes the boiling point of the water, and it changes the freezing point of the water
8 0
3 years ago
Read 2 more answers
Calculate the molecular mass of glucose
yan [13]
  • Glucose = C₆H₁₂O₆.
  • Atomic mass of C = 12 u
  • Atomic mass of H = 1 u
  • Atomic mass of O = 16 u
  • Therefore, the molecular mass of glucose
  • = (6 × Atomic mass of C) + (12 × Atomic mass of H) + (6 × Atomic mass of O)
  • = (6 × 12) + (12 × 1) + (6 × 16) u
  • = 72 + 12 + 96 u
  • = 180 u

<u>Answer</u><u>:</u>

<u>1</u><u>8</u><u>0</u><u> </u><u>u</u>

Hope you could understand.

If you have any query, feel free to ask.

6 0
2 years ago
about the lung with balloons what respiratory organ do the small balloons represents? the big balloons?
butalik [34]

Answer:

The plastic bottle represents the chest cavity, the straws act as the bronchi, the small balloons inside the plastic bottle serves as the lungs and the big balloon at the bottom of the plastic bottle is the diaphragm.

Explanation:

7 0
3 years ago
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