Which of the following is a farming method that helps reduce the effects of wind erosion?

Answers

Answer 1

Answer: You can reduce wind erosion by providing a protective plant cover for the soil.

Related Questions

If you determined that the volume of a silver bar is 100.mL,how many atoms of silver would be in the bar? The density of silver is 10.5g/mL. 271
Nitrogen oxides and sulfur oxides make _____.
A salt could be formed by an alkali metal and a(n)a. halogen. b. metalloid. c. transition metal. d. alkaline-earth metal.
Carbon atoms have four electrons in their outer shell. This means that a single carbon atom can form up to _______ bonds with other atoms.twoeightfoursix
Define the following symbols that are encountered in rate equations: [A]0, t1/2 [A]t, k.

An electron has a charge identical to that of

Answers

The smallest possible particle of an element is a atom. An electron has a charge identical to that of of a proton, but with the opposite sign.

What is atom?

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. An electron has a charge identical to that of of a proton, but with the opposite sign.

Therefore, an electron has a charge identical to that of of a proton, but with the opposite sign.

To learn more about atom, here:

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Protons! I hope that helped out!

Which two physical properties allow a mixture to be separated by chromatography?(1) hardness and boiling point
(2) density and specific heat capacity
(3) malleability and thermal conductivity
(4) solubility and molecular polarity

Answers

Answer:

The correct option is: (4) solubility and molecular polarity

Explanation:

Chromatography is an analytical technique which is used for the separation of various components in a given mixture.

In this process, the mixture to be separated is first dissolved in the mobile phase, which carries it through the stationary phase, thus leading to separation of the various components.

This differential separation is the result of the differential migration which is based upon the solubility and polarity of the individual components of of the given mixture.

solubility and molecular polarity

If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over?Unbalanced equation: Ca + HCl → CaCl2 + H2

Answers

Answer:

2.53 grams of hydrogen gas will be produced and 12.2 many grams of the excess reactant i.e. calcium will be left over.

Explanation:

$Ca + 2HCl\rightarrow CaCl_2 + H_2$

Moles of calcium = $(62.8 g)/(40 g/mol)=1.57 mol$

Moles of HCl = $(92.3 g)/(36.5 g/mol)=2.53 mol$

According to reaction, 2 moles of HCl reacts with 1 mole of calcium :

Then 2.53 moles of HCl will recat with :

$(1)/(2)* 2.53 mol= 1.265 mol$ of calcium.

As we can see moles of calcium are in excessive amount. Hence calcium is an excessive reagent.

Moles of calcium left unreacted =1.57 mol - 1.265 mol =0.305 mol

Mass calcium left unreacted = 0.305 mol × 40 g/mol =12.2 g

Since, calcium is an excessive reagent HCl is limiting reagent and the amount of hydrogen gas produced will depend on HCl .

According to reaction, 2 moles of HCl gives 1 mole of hydrogen gas.

Then 2.53 moles of HCl will give:

$(1)/(2)* 2.53 mol= 1.265 mol$ of hydrogen gas.

Mass of 1.265 mol of hydrogen gas = 1.265 mol × 2 g/mol = 2.53 g

2.53 grams of hydrogen gas will be produced and 12.2 many grams of the excess reactant i.e. calcium will be left over.

Answer:

2.55 g of hydrogen

12.17 g calcium.

to nearest hundredth.

Explanation:

The balanced equation is:

Ca + 2HCl ---> CaCl2 + H2

Using the atomic masses

40.078 g Ca react with 72.916 g of HCl to give 2.016 g HCl

The ratio of Ca to HCl in the above is 1 to 1.81935

so 62.8 g Ca reacts with 62.8 * 1.81935 = 114.245 g HCl

so there is excess of Ca in the given weights.

Therefore the mass of Hydrogen produced

= (2.016 / 72.916) * 92.3

= 2.552 g of hydrogen gas.

The mass of calcium required to produce 2.552 g of hydrogen is:

(2.552 / 2.016) * 40.078

= 50.73 g

So the excess of calcium is 62.8 - 50.73

= 12.17 g.

Which of the following circumstances will result in a reaction that is spontaneous only at low temperatures?A.) positive enthalpy change and positive entropy change
B.) negative enthalpy change and negative entropy change
C.) positive enthalpy change and negative entropy change
D.) negative enthalpy change and positive entropy change

Answers

Answer: B.) negative enthalpy change and negative entropy change

Explanation:

According to Gibb's equation:

$\Delta G=\Delta H-T\Delta S$

$\Delta G$ = Gibbs free energy

$\Delta H$ = enthalpy change

$\Delta S$ = entropy change

T = temperature in Kelvin

$\Delta G$ = +ve, reaction is non spontaneous

$\Delta G$ = -ve, reaction is spontaneous

$\Delta G$ = 0, reaction is in equilibrium

Thus when $\Delta H$ = -ve

$\Delta S$ = -ve

$\Delta G=(-ve)-T(-ve)$

$\Delta G=(-ve)(+ve)=-ve$ only at low temperature

Reaction is spontaneous only if temperature is low.

D) negative enthalpy and positive entropy,
since the formula G=H-TS when a reaction is spontaneous then G must be negative, and if values of t are low then the only time it is guaranteed to be a negative G value is if H is positive and S is negative

A nondirectional alternative hypothesis claims that no difference will be found between the research variables.a. True
b. False

Answers

Answer: The given statement is False.

According to alternative hypothesis, observed difference exists between research variables, which does not occur by chance.

Whereas, a non directional alternative hypothesis has no definite directions of the difference but a certain difference does exist.

Thus, the given statement is False.

Answer:

false

Explanation:

What is an ionice equation with phases for the following chemical reaction: 2HBr(aq)+BaOH2(aq)-->2H2O(l)BaBr2(aq)?

Answers

Molecular reaction

2HBr(aq) Ba(OH)2 (aq) = 2H2O (l) BaBr2(aq)

Ionic equation

2H 2Br- Ba 2 2OH- --------> Ba 2 2Br - 2H2O

Net ionic equation

2H (aq) 2OH- (aq)- ---------> 2H2O (l)

Other Questions

Which occurs when two fluorine atoms react to produce a fluorine molecule? (1) Energy is absorbed as a bond is broken. (2) Energy is absorbed as a bond is formed. (3) Energy is released as a bond is broken. (4) Energy is released as a bond is formed.

What is ductiliy in a solid

Carvone is a substance that occurs in two forms having different arrangements of the atoms but the same molecular formula (c10h14o) and mass. one type of carvone gives caraway seeds their characteristic smell, and the other type is responsible for the smell of spearmint oil. calculate the mass percent of each element in carvone.

According to the Bohr model of the atom, energy is emitted as light when electronsO fall back down to a lower energy level O jump up to a higher energy level are absorbed into the nucleus O are ejected from the nucleus