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White raven [17]
3 years ago
13

PLEASE HELP FELLOW BRAINLIEST I NEED YOU AND QUICK!!!!!!!!!!!!!!!!!!!!!!!! Thomas Jefferson was the first to suggest what practi

ce?
1. plowing legumes into the soil
2.adding a bacteria filled powder to the land while planting
3. alternating their crops between different fields each year
4.planting legumes every year in the same field
Chemistry
2 answers:
vivado [14]3 years ago
7 0
3 alternation their crops between different fields each year. They left one field fallow so that it could have an opportunity to regain some nutrients.
VashaNatasha [74]3 years ago
5 0

Answer:

alternation of crops

Explanation:

Common legumes include clover, beans, peas, alfalfa, and peanuts. Thomas Jefferson suggested that farmers alternate their crops between different fields each year. They range from single cells up to large organisms measuring 50 centimeters or more.

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Is Decanitrogen tetroxide Ionic or Molecular
Lady bird [3.3K]

Answer:

Decanitrogen is molecular

Explanation:

3 0
3 years ago
Read 2 more answers
Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B
eimsori [14]
2 boxes of A
Because C = A + B
2 of A = 20 grams
at the other hand we have 2 of B = 10
So 20 + 10 = 30 grams
3 0
4 years ago
Which of the following best explains why Pangaea broke apart into the modern-day continents?
Oksana_A [137]

Answer:

C. Balanced forces caused a change in the motion of the plates.

Explanation:

Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. This movement in the mantle causes the plates to move slowly across the surface of the Earth.

6 0
3 years ago
Which structures main function is to produce food (sugar) in a plant
bija089 [108]
Chloroplasts is the answer
3 0
3 years ago
What is the mass of naoh that would have to be added to 500 ml of a solution of 0.20 m acetic acid in order to achieve a ph of 5
il63 [147K]

The correct answer is 2.5 g.

Let x be the mass of NaOH in grams

The molar mass of NaOH = 40.0 gms/mol

Moles of NaOH = mass / molecular mass of NaOH

= x grams / 40.0 gms /mol = 0.025 x mol

Initial moles of CH₃COOH = volume × concentration of CH₃COOH

= 500 / 1000 × 0.20 = 0.1 mol

CH₃COOH + NaOH ⇒ CH₃COONa + H2O

Moles of CH₃COOH left = initial moles of CH₃COOH - moles of NaOH = 0.1 - 0.025x mol

Moles of CH₃COONa formed = moles of NaOH = 0.025x mol

Henderson-Hasselbalch equation:

pH = pKa + log ([CH₃COONa] / [CH₃COOH])

= pKa + log (moles of CH₃COONa /moles of CH₃COOH)

5.0 = 4.76 + log [0.025a / (0.1 - 0.025a)]

log [0.025a / (0.1 - 0.025a)] = 0.24

0.025a / (0.1 - 0.025a) = 10^0.24 = 1.738

0.068445a = 0.17378

a = 0.17378 / 0.068445

= 2.54 g

Mass of NaOH = a = 2.54 g or 2.5 g

4 0
3 years ago
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