True or false. Nitrogen is extremely important for good crops?

Answers

Answer 1

Answer:

Answer:

True

Explanation:

Without enough nitrogen there is not enough nutrients for plants to make both aminoacids and many products of secondary metabolism

Related Questions

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top secret. The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.To find the pKa of X-281, you prepare a 0.089 M test solution of X-281 at 25.0 ∘C. The pH of the solution is determined to be 2.40. a. What is the pKa of X-281? Express your answer numerically.At 25∘C, for any conjugate acid-base pairpKa + pKb = 14.00b. What is pKb of the conjugate base of X-281? (Assume 25 ∘C.) Express your answer numerically.
Eisenhower, Kennedy, and Johnson all approved of the United States backing the South Vietnamese in their civil war.a. Trueb. False
Which statement describes heterogeneous mixtures?A. They are made up of two or more pure substances that are not chemically bonded together. B. They appear uniform, like a pure substance. C. They have fixed ratios between their components. D. They are made up of two or more pure substances that can be separated only by chemical processes.
Which ion was formed by providing the second ionization energy to remove an electron? Ca2+ N3– Fe3+ S2–
A(n) _______________ compound is a group of atoms held together by chemical bonds.

Four processes that change rock from one type to another.

Answers

Erosion
waethring
deposition
pressure or heat
all of this can change the form of rock to another

What is Rutherford atomic modle

Answers

Answer:

Rutherford's atomic model explained how the electrons surrounded the nucleus of protons and neutrons. His model showed how J. J. Thomson's Plum Pudding model was incorrect.

Answer:Rutherford model of an atom shows that an atom is mostly an empty space,with electrons orbiting a fixed positively charged nucleus in set.

Explanation:

Consider the reaction C12H22O11(s)+12O2(g)→12CO2(g)+11H2O(l) in which 10.0 g of sucrose, C12H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/∘C. The temperature increase inside the calorimeter was found to be 22.0 ∘C. Calculate the change in internal energy, ΔE, for this reaction per mole of sucrose.

Answers

Answer:

the change in internal energy per mole of sucrose is 5989 KJ/mol

Explanation:

Since the calorimeter is a bomb calorimeter , where the volume remains constant

ΔE= Qrx

And assuming no heat losses to the surroundings

Qv + Qrx = 0

Cc*ΔT - Qrx = 0 ,

Qrx = Cc * ΔT = 7.50 KJ/°C * 22 °C = 165 KJ

the change in internal energy is calculated dividing by the number of sucrose moles involved n. the molecular weight of sucrose is

Mw= 12* 12g/mol + 22* 1g/mol + 11* 16 g/mol = 342 g/mol

n = m / Mw = 10 g / 342 g/mol = 0.029 mol

the change in internal energy per mole of sucrose is

Δe= ΔE/n = 165 KJ/0.029 mol = 5989 KJ/mol

If you knew the number of valence electrons in a nonmetal atom, how would you determine the valence of the element?

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Usually, the group number of the element would tell you the amount of valence electrons. In an element, their needs to be a full octet in order for it to be stable (aka happy element). Octet means 8 valence electrons in its orbital.

a student recorded the temperature of a solution every 30s for 3 min while the solution was heating on bunsen burner graph data chemistry chapter 2

Answers

Answer:

3min=180s so 180:30=6

Water _____.dissolves in most substances
heats and cools very quickly
is always 100% pure
is neither an acid nor a base

Answers

Answer: is neither an acid nor a base

Explanation: Water is a universal solvent which means it can dissolve most of the substances in it.

Water has high thermal heat capacity , which means large heat is required to heat the water.

Water is not always pure as it gets contaminated by various pollutants present in the atmosphere such as gases, bacteria and suspended matter.

Water is an amphoteric substance which can act as both acid and base, thus can donate and acept [texH^+[/tex] ions.Thus it is neither an acid nor a base.

$HCl+H_2O\rightarrow H_3O^++Cl^-$

Here water is accepting a proton, thus it acts as base.

$NH_3+H_2O\rightarrow NH_4^++OH^-$

Here water is donating a proton, thus it acts as acid.

Answer:

Is neither an acid nor a base

Explanation:

Other Questions

Chlorine has two naturally occuring isotopes - chlorine-35 and chlorine-37. Elaborate on how the atomic mass is determined given that chlorine-35 has an abundance of 75.78% and has a mass of 34.969 amu and that chlorine-37 has an abundance of 24.22% and a mass of 36.966 amu.

1) 513.4 m to cmChemistry

Which family (group) of elements rarely forms chemical bonds with other elements?a. nonmetals b. noble gases c. halogens d. metals

Which end of the H-F molecule will be partially positive?neither endthe fluorine endboth endsthe hydrogen end