Match the term with its definition. A. Bed load A strip of land next to a river that is often very fertile B. Headwater The beginning of a river C. Suspended load Large boulders carried along by a river D. Flood plain Small rocks carried along by a river

Answers

Answer 1

The answers are A.Bed load→ Large boulders carried along by a river with high velocities; B.Headwater→The beginning of a river, often located very high in the mountains; C.Suspended load→Small rocks carried along by a river as it flows; and D.Flood plain→A strip of land next to a river that is often very fertile with a flatter valley floor.

Answer 2

Bed load - Large boulders carried along by a river

Headwater - The beginning of a river

Suspended load - Small rocks carried along by a river

Flood plain - A strip of land next to a river that is often very fertile

(APEX Verified 2020)

Related Questions

Reacting 35.4 ml of 0.220 m agno3 with 52.0 ml of 0.420 m k2cro4 results in what mass of solid formed

Answers

Answer is: 1.29 grams of solid formed.
Chemical reaction: 2AgNO₃(aq) + K₂CrO₄(aq) → Ag₂CrO₄(s) + 2KNO₃(aq).
n(AgNO₃) = c(AgNO₃) · V(AgNO₃).
n(AgNO₃) = 0.220 M · 0.0351 L.
n(AgNO₃) = 0.0078 mol; limiting reactant.
n(K₂CrO₄) = 0.420 M · 0.052 L.
n(K₂CrO₄) = 0.022 mol.
From chemical reaction: n(AgNO₃) : n(Ag₂CrO₄) = 2 : 1.
n(Ag₂CrO₄) = 0.0078 mol ÷ 2.
n(Ag₂CrO₄) = 0.0039 mol.
m(Ag₂CrO₄) = 0.0039 mol · 331.73 g/mol.
m(Ag₂CrO₄) = 1.29 g.

The half-life of a certain tranquilizer in the bloodstream is 5050 hours. how long will it take for the drug to decay to 8686% of the original dosage? use the exponential decay model, upper a equals upper a 0 e superscript kta=a0ekt, to solve.

Answers

Using the exponential decay model; we calculate "k"
We know that "A" is half of A0
A = A0 e^(k× 5050)
A/A0 = e^(5050k)
0.5 = e^(5055k)
In (0.5) = 5055k
-0.69315 = 5055k
k = -0.0001371
To calculate how long it will take to decay to 86% of the original mass
0.86 = e^(-0.0001371t)
In (0.86) = -0.0001371t
-0.150823 = -0.0001371 t
t = 1100 hours

what temperature does blood boil at (in Celsius Kelvin and Fahrenheit)

Answers

where temperature is measured in Kelvin (Kelvin = Celsius + 273.15). For example, 1L of blood at 1 ATM boils at 373.15 Kelvin. If you doubled the atmospheric pressure, the blood would boil at 746.3 Kelvin, or 473.15 Celsius. Blood boils at approximately the same temperature as water, around 100 degrees centigrade.

Blood boils at a temperature close to water's boiling point: 100°C, 373 K, or 212°F. This boiling point slightly varies due to dissolved substances. Understanding these values illustrates the relationship among different temperature scales.

When considering the temperature at which blood boils, it primarily depends on its composition, but generally, it is close to the boiling point of water. The boiling point of water is an important reference and is commonly known for each temperature scale:

Celsius (°C): Water boils at 100°C.Kelvin (K): Water boils at 373 K.Fahrenheit (°F): Water boils at 212°F.

Human blood is mostly water, and hence its boiling point is similarly close; however, due to the presence of dissolved proteins, salts, and other substances, the exact boiling point may slightly vary. At normal atmospheric pressure, it is approximately 100°C (373 K or 212°F). This concept is an important illustration of the relationship among the temperature scales.

What is the molarity of a solution that contains 20.45 g of sodium chloride (NaCl) dissolved in 700.0 mL of solution?

Answers

molarity is the number of moles of solute in 1 L of solution.
the mass of NaCl added - 20.45 g
number of moles of NaCl - 20.45 g / 58.5 g/mol = 0.350 mol
volume of the solution is 700.0 mL
since molarity is the number of moles in 1000 mL
and if 700.0 mL contains - 0.350 mol
therefore 1000 mL contains - 0.350 mol / 700.0 x 1000 = 0.500 mol
hence molarity of solution is 0.500 M

If generating a key for this data, what is the correct sequence from bottom to top?

Answers

bottom to top hope it helps

Final answer:

Generating a key from bottom to top signifies rearranging data in a particular order, often used in sorting or indexing processes. The actual sequence depends on the set rules, such as alphabetically or numerically.

Explanation:

The correct sequence from bottom to top when generating a key for data, generally implies rearranging the data in a specific order. Let's consider a scenario in which we have data items named A, B, C, and D from bottom to top. In this case, the correct sequence from bottom to top might be D, C, B, A, assuming we're ordering in reverse-alphabetical order. However, the exact sequence can depend on the specific criteria or rules you're using to generate the key.

These keys are often used in computer operations such as sorting and indexing to manage and locate data efficiently. It's always important to understand the specific context in which the key is being applied for an accurate sequence.

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Consider the rate law below.
What effect does doubling the concentration of each reactant have on the rate? The rate increases to two times the original rate. The rate increases to four times the original rate. The rate increases to six times the original rate. The rate increases to eight times the original rate.

Answers

If you double the concentration of A, the rate is doubled. If you doubled the concentration of B, since the rate law has B^2, the rate is multiplied by 4. If you double both A & B's concentrations, then the rate would be multiplied by 2*4 = 8, which is the last option.

What will happen to the volume if the number of moles of a gas is decreased at constant temperature and pressure? The volume will increase. The volume will decrease. The volume will remain the same. The volume will be negative.

Answers

The ideal gas law states that PV = nRT. Therefore, if pressure P and temperature T are held constant, and the number of moles n is decreased, the right-side value of the equation decreases. To compensate, volume V must decrease as well. This is the second choice.

Answer:

The volume will decrease.

Explanation:

The number of moles of a gas is directly proportional to its volume according to Avogadro's law. Hence volume increases as number of moles increases. Volume also decreases as number of moles decreases.

Hence according to the question, when the number of moles of a gas decreases, the volume of the gas also decreases along side in obedience to the Avogadro's law.

What is the half-life of an isotope that decays to 6.25% of its original activity in 18.9 hours?

Answers

Radioactive material obeys 1st order decay kinetics,
For 1st order reaction, we have
k = [tex] \frac{2.303}{t}Xlog \frac{\text{initial conc.}}{\text{final conc.}} [/tex]
where, k = rate constant of reaction

Given: Initial conc. 100, Final conc. = 6.25, t = 18.9 hours

∴ k = [tex] \frac{2.303}{18.9} X log \frac{100}{6.25} [/tex] = 0.1467 hours^(-1)

Now, for 1st order reactions: half life = [tex] \frac{0.693}{k} = \frac{0.693}{0.1467} [/tex] = 4.723 hours.

Final answer:

The half-life of an isotope that decays to 6.25% of its original activity in 18.9 hours is 4.725 hours. This is calculated by understanding that the isotope undergoes 4 half-lives to reach the 6.25% activity.

Explanation:

The half-life (T1/2) of a radioactive isotope refers to the time period for half of the original nuclei to decay. In this case, the isotope decays to 6.25% of its original activity in 18.9 hours which means it goes through 4 half-lives (since (1/2)^4 = 1/16 which approximately equals 6.25%). Hence, the half-life of this isotope is 18.9/4 = 4.725 hours.

This concept is derived from the exponential decay of unstable radioisotopes where half-life (T1/2) is calculated by dividing the total time by number of half-lives.

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Which element is likely to be chemically unreactive? krypton (8 valence electrons) rubidium (1 valence electron) silicon (4 valence electrons) magnesium (2 valence electrons) bromine (7 valence electrons)?

Answers

Electronic configuration of elements of interest are as follows:
1) Kr = [Ar] 3d10 4s2 4p6
2) Rb = [Kr] 5s1
3) Si = [Ne] 3s2 3p2
4) Mg = [Ne] 3s2
5) Br = [Ar] 3d10 4s2 4p5

From above listed electronic configurations of different elements, it can be seen that expect Kr, all the elements has partially filled atomic orbitals. Hence, they will be reactive in nature. So, Kr is likely to be chemically nonreactive.

What are silicates? what are silicates? silicates are extended arrays of silicon and nitrogen. they are the most common network covalent atomic solids. silicates are extended arrays of sulfur and oxygen. they are the most common network covalent atomic solids. silicates are extended arrays of silicon and oxygen. they are the most common network covalent atomic solids. silicates are extended arrays of silicon and oxygen. they are the least common network ionic atomic solids?

Answers

The answer is b I think

Answer:

silicates are extended arrays of silicon and oxygen.

Explanation:

By definition, a silicate is a compound consisting of the chemical elements silicon (Si) and oxygen (O), derived from salicylic acid, which may be a salt or an ester. Of this group stand out the silicates formed by the alkali metals, constituent elements of Family IA of the periodic table, which are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs) and francium. (Fr), as these are water soluble and have various applications in industry and the laboratory. This list excludes the last two elements mentioned, due to their high molecular weight and their radioactivity. It is also relevant to report that salicylic acid is one of the derivatives of the second most abundant chemical element in the earth's crust, of the order of 27%, silicon (Si).

How many grams of titanium (Ti, 47.90 g/mol) are in an instrument gear with 5.74x10^22 atoms of Ti

Answers

Answer:
Mass = 45.64 g

Solution:

First of all calculate number of moles for given number of atoms,

As,
6.022 × 10²³ atoms = 1 Mole
So,
5.74 × 10²² atoms = X Moles

Solving for X,
X = (1 mol × 5.74 × 10²² atoms) ÷ 6.022 × 10²³ atoms

X = 0.953 Moles

Now converting moles into mass,
As,
Moles = Mass / M.mass
So,
Mass = Moles × M.Mass
Putting Values,
Mass = 0.953 mol × 47.90 g.mol⁻¹

Mass = 45.64 g

Answer:

Grams of Ti = 4.56 g

Explanation:

Given:

# atoms of Titanium = 5.74*10²²

To determine:

The mass of Ti in corresponding to the given number of atoms

Explanation:

1 mole of any substance contains Avogadro's number of atoms.

i.e. 1 mole of Ti = 6.023*10²³ atoms

Since 1 mole Ti = 47.90g,

47.90 g of Ti contains 6.023*10²³ atoms

Therefore, [tex]= \frac{5.74*10^{22} atoms*47.90g}{6.023*10^{23} atoms} =4.56\ g[/tex] of Ti would correspond to:

Write a general word equation for a neutralization reaction.

Answers

Hydrochloric acid + Sodium hydroxide =Sodium chloride +water

Final answer:

In a neutralization reaction, an acid reacts with a base to form salt and water, and the net ionic equation for this reaction usually involves hydrogen ions from the acid joining with hydroxide ions from the base to form water.

Explanation:

A general word equation for a neutralization reaction is: Acid + Base → Salt + Water

During neutralization, the hydrogen ions from the acid react with the hydroxide ions from the base to form water. The remaining ions (from the acid and base) then combine to form a salt. If we consider the neutralization of a strong acid with an ionic hydroxide, the net ionic equation simplifies to:

H3O+ (aq) + OH−(aq) → 2H2O(l)

This equation represents the concentration of hydrogen ions from the acid reacting with hydroxide ions from the base, simplifying down to just the formation of water since strong acids completely dissociate in water.

List a few ways that would lead you to believe a chemical reaction has occurred

Answers

There are many ways which can lead us to believe a chemical reaction has occurred. I am discussing few of them.

Change in Color:
Few reactions proceed with the change in colour. When Bromine Water (yellow-Brown) is treated with unsaturated compounds, the color disappear as the reaction is completed.

Gas Production:
Some reactions proceed with the elimination of gas i.e. CO₂ , H₂, N₂, H₂O e.t.c.

Temperature Change:
Some reactions evolve or absorb heat when proceed. This change is the evidence of progress of reaction.

Thin Layer Chromatography:
Very important technique in detecting the progress of reaction by determining the number of spots for UV active compounds on TLC plate. Even non UV active compounds can be detected by using other locating agents.

Instrumental Techniques:
Modern techniques like IR, MS, NMR, UV spectroscopy can be used to detect the progress of reaction.

A 10.0ml sample of calcium hydroxide solution requirewd 26.85ml of 0.225 m hydrochoric acid for neutralization. calculate the nolar concentration of the bsae

Answers

the balanced equation for the acid base reaction is as follows
Ca(OH)₂ + 2HCl ---> CaCl₂ + 2H₂O
stoichiometry fo Ca(OH)₂ to HCl is 1:2
number of HCl moles reacted - concentration of HCl x volume
number of HCl moles - 0.225 mol/L x 26.85 x 10⁻³ L = 6.041 x 10⁻³ mol
according to molar ratio
2 mol of HCl reacts with 1 mol of Ca(OH)₂
therefore 6.041 x 10⁻³ mol of HCl reacts with - 6.041 x 10⁻³ /2 mol = 3.021 x 10⁻³ mol
number of Ca(OH)₂ moles in 10.0 mL - 3.021 x 10⁻³ mol
therefore Ca(OH)₂ moles in 1000 mL - 3.021 x 10⁻³ mol / (10.0 x 10⁻³ L) = 0.302 mol/L
molarity of Ca(OH)₂ - 0.302 M

Final answer:

To calculate the molar concentration of the base, use stoichiometry and the given volume and concentration of the acid. The balanced chemical equation helps determine the moles of acid and base. Divide the moles of base by the volume of the base solution to find the molar concentration.

Explanation:

To calculate the molar concentration of the base, we can use the stoichiometry of the neutralization reaction between calcium hydroxide (Ca(OH)2) and hydrochloric acid (HCl). The balanced chemical equation for this reaction is:

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

From the equation, we can see that 1 mole of Ca(OH)2 reacts with 2 moles of HCl. We are given that 26.85 mL of 0.225 M HCl is required to neutralize a 10.0 mL solution of Ca(OH)2. The moles of HCl can be calculated using the equation:

moles of HCl = volume of HCl (L) × concentration of HCl (M)

Once we have the moles of HCl, we can use the stoichiometry of the reaction to calculate the moles of Ca(OH)2. Finally, we divide the moles of Ca(OH)2 by the volume of the Ca(OH)2 solution to find the molar concentration.

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Amino acids are monomers that join together in complex macromolecules called _____.

A.
phospholipids

B.
proteins

C.
carbohydrates

D.
polysaccharides

Answers

Answer is B. proteins

Amino acids are building blocks in
proteins.
Proteins play numerous roles in cellular processes.

Final answer:

Amino acids combine to form complex macromolecules called proteins. Other listed macromolecules - phospholipids, carbohydrates, and polysaccharides - are not made from amino acids.

Explanation:

Amino acids are the building blocks of proteins. They join together in a specific sequence to form these complex macromolecules. In the list provided, the correct answer is 'B. Proteins'. This is because phospholipids, carbohydrates, and polysaccharides are different types of macromolecules constructed from other monomers, not amino acids. The resulting protein structure determines its function in an organism.

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where are the most reactive nonmetals located on the periodic table?
a. the second column from the right side of the table
b. the uppermost complete row of the table
c. the column at the far left side of the table
d. the rows at the bottom of the table connecting two sections

Answers

The halogens are the most reactive nonmetals, they are the second column from the right side of the table

Final answer:

The most reactive nonmetals are found in the column second from the right side of the periodic table, also known as Group 17 or the halogens. They are highly reactive because they need to gain just one electron to complete their outer electron shell. Fluorine is the most reactive nonmetal.

Explanation:

The most reactive nonmetals are located in the upper right section of the periodic table, in the column that is second from the right side. This column is known as Group 17, or the halogens. Halogens are highly reactive due to their propensity to gain an electron to fill their outer electron shells, and they exhibit rich variety of chemical behaviors.

Elements belonging to the same column or group, such as the halogens, share many chemical characteristics because they have the same number of valence electrons.

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If 2500. J of energy are added to 120. g of benzene at 30. degrees C, what will be its final temperature?

Answers

When heat (q) is absorbed by "m" grams of a substance then the change in temperature is given as,

q = m Cp (T₂ - T₁) --- (1)

where;
Cp = Specific Heat

Specific heat of Benzene is 1.72 J/g.°C

Now,
Solving equation 1,

(T₂ - T₁) = q / m Cp
Putting values,
(T₂ - 30 °C) = 2500 J ÷ (120 g ×1.72 J/g.°C)

(T₂ - 30 °C) = 2500 J ÷ (206 J/°C)

(T₂ - 30 °C) = 12.13 °C

T₂ = 12.13 °C + 30 °C

T₂ = 42.13 °C

The final temperature of benzene after adding 2500 J of energy is 41.97°C.

To determine the final temperature of benzene after adding 2500 J of energy, we can use the formula for specific heat capacity:

q = mcΔT

Where:

q is the heat added (2500 J)m is the mass of benzene (120 g)c is the specific heat capacity of benzene (1.74 J/g°C)ΔT is the change in temperature

Rearranging the formula to solve for ΔT:

ΔT = q / (mc)

Substitute the given values:

[tex]\Delta T = \frac{2500 \, \text{J}}{120 \, \text{g} \times 1.74 \, \text{J/g \textdegree C}}\\\\\Delta T = \frac{2500 \, \text{J}}{208.8 \, \text{J/°C}} \approx 11.97 \textdegree C[/tex]

Add this change to the initial temperature of 30°C:

Final temperature = 30°C + 11.97°C = 41.97°C

Therefore, the final temperature of the benzene after adding 2500 J of energy is 41.97°C.

Nuclear power plants produce a waste product of cesium-137, which has a half-life of 30 years. how long would it take for the cesium to decay to 1/8 of its original amount?

Answers

[tex]m(final)=m(initial)*( \frac{1}{2} )^{ \frac{time}{half-life} m(final)= (1/8) *m(initial) [/tex]

[tex] \frac{1}{8} m(initial)=m(initial)*( \frac{1}{2})^{ \frac{time}{halg-life} } [/tex]

[tex] \frac{1}{8} = \left( \frac{1}{2} \right)^{\frac{time}{30} } [/tex]

[tex]( \frac{1}{2})^{3}= (\frac{1}{2} )^{ \frac{time}{30}} \\ \\ 3= \frac{time}{30} \\ \\ time = 90 (years)[/tex]

Answer:

90 years

Explanation:

it takes three halves of one to get to 1/8.

So 30 times 3 = 90

How are elements with similar properties displayed in the periodic table?

Answers

Elements with similar properties are displayed in the same group as synonymous elements. These are the columns in the table, and each of the elements in a particular column exhibit similar traits to one another.

When an arrhenius base is dissolved in h2o, the only negative ion present in the solution is?

Answers

Answer is: hydroxide ions (OH⁻).
An Arrhenius base is a substance that dissociates in water to form hydroxide ions (OH⁻).
For example sodium hydroxide: NaOH(aq) → Na⁺(aq) + OH⁻(aq) or barium hydroxide: Ba(OH)₂(aq) → Ba²⁺(aq) + 2OH⁻(aq).
According to this theory acids are substances which produce hydrogen ions in water solution.

In order for plants to go through photosynthesis, they must use
A. X rays.
B. visible light.
C. infrared rays.
D. ultraviolet light.

Answers

In order for plants to go through photosynthesis, they must use B. visible light.

A) most reactions involve bond breaking and bond making. this equation shows what happens when methane (ch4) burns in oxygen (o2). mark the bonds broken in blue and the bonds formed in red.\

Answers

When CH₄ burns with the presence of O₂, CO₂ and H₂O are formed as the products. The balanced equation is;

CH₄ + 2O₂ → CO₂ + 2H₂O

When the reaction happens, 4 C-H bonds of CH₄ and O=O bond of O₂ are broken down to form 2 C=O bonds in CO₂ and 2 O-H bonds in H₂O.

The broken and formed bonds are marked in the image.

Question 13 unsaved the nonmetals in groups 5a, 6a, and 7a: question 13 options: lose electrons when they form ions. form ions with charges of 3-, 2-, and 1-, respectively. form positively charged ions. form ions with a numerical charge equal to their group number.

Answers

How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?

If hexane (c6h14), octane (c8h18), and octanol (c8h17oh) are heated evenly at different altitudes, rank them according to the order in which you would expect them to begin boiling.

Answers

Answer:
At different altitudes the Hexane will boil first, followed by octane and octanol will boil at last.

Explanation:
The difference in the boiling point of these compounds is mainly due to difference in the intermolecular interactions found in them.
Hexane boils first as compared to other two because the interactions present in it are London Dispersion forces which is too present in octane but weaker than octane as the strength of London Dispersion forces increases with increase in carbon chain.
Octanol will have the greatest boiling point because it also has Hydrogen bond interactions along with London Dispersion forces which are considered the strongest intermolecular forces.

Which determines whether the fire will have open flames?
Question 4 options:

flash point

fuel-air mix

exothermic energy

type of fuel

Answers

Which determines whether the fire will have open flames?

flash point - this is not the answer as it only denotes the minimum temperature required for vapors of something combustible will ignite
exothermic energy - is the energy released during the combustion reaction so this is not the answer
type of fuel - is not the general answer

The answer is fuel-air mix as it will determine the vigor of the flame.

An analogy to define the term half-life?

Answers

Hey there!:

The half life of a radioactive element is the time interval in which a sample of this element reduces to half. This interval of time is also called the period of disintegrating.As radioactive elements disintegrate, in the course of time, their quantity and activity are reducing and consequently the amount of energy emitted by it, due to radioactivity, is also reduced.

hope this helps!

If you had 1,000 pennies and threw them into the air, you would expect 500 to land heads up and 500 to land with tails up. Now, imagine someone took all of the tails up pennies, leaving with you 500 left. You throw the remaining pennies in the air, and again about half of them will land heads up.
Now, assuming each flip is considered a half life, that heads act as reactants and tails are products that go away, it acts just as a first order reaction. In each flip you end up with half of what you had before, no matter how many it was!

What type of wave is sound?
a.longitudinal
b.surface
c.light
d.transverse

Answers

Sound waves are
a.longitudinal.

Which one of these elements is an alkaline earth metal

Answers

The answer to this problem is Beryllium is an alkaline earth metal.

Calculate the mass of agcl that should be produced when an excess of agno3 is reacted with 500 mg

Answers

Answer is: mass of silver chloride is 0.573 grams.
Balanced chemical reaction:
2AgNO₃ + [Co(NH₃)₅Cl]Cl₂ → 2AgCl + [Co(NH₃)₅Cl](NO₃)₂.
m(Co(NH₃)₅Cl]Cl₂) = 500 mg ÷ 1000 mg/g = 0.5 g.
n(Co(NH₃)₅Cl]Cl₂) = 0.5 g ÷ 250.4 g/mol.
n(Co(NH₃)₅Cl]Cl₂) = 0.002 mol.
From chemical reaction: n(Co(NH₃)₅Cl]Cl₂) : n(AgCl) = 1 : 2.
n(AgCl) = 2 · 0.002 mol = 0.004 mol.
m(AgCl) = 0.004 mol · 143.32 g/mol.
m(AgCl) = 0.573 g.

Relating ideas explain why ionic crystals melt at much higher temperatures than typical covalent molecular crystals.

Answers

Because of the way the temp is set up

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