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ASHA 777 [7]
4 years ago
14

When a river overflows its banks, it deposits sediment over a broad, flat area of land on both sides of the river. This broad fl

at area is called a _______.
Chemistry
1 answer:
Alex777 [14]4 years ago
3 0
<span>When a river overflows its banks, it deposits sediment over a broad, flat area of land on both sides of the river. This broad flat area is called a floodplain. Floodplains usually have </span><span>areas of higher elevation on both sides</span>
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How much heat is added if 0.814g of water increase in temperature by 0.351 degree C
steposvetlana [31]

Answer:

1·199 J

Explanation:

Given

Mass of water = 0·814 g = 0·814 × 10^{-3} kg

Increase in temperature = 0·351 °C

Let the amount of heat added be Q J

Formula for heat added is

<h3>Q = m × s × ΔT</h3>

where Q is the amount of heat transferred

m is the mass

s is the heat capacity

ΔT is the change in temperature

Heat capacity of water = 4200 J/kg °C

Applying the formula for heat added

Q = 0·814 × 10^{-3} × 4200 × 0·351  = 1·199 J

∴ Amount of heat added = 1·199 J

8 0
4 years ago
A newly discovered element, Z, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267
kirill115 [55]
Ok so, remember that t<span>he average atomic mass is what is seen on the periodic table. It is the average mass of all of the isotopes with their frequency taken into account. What you need to do is add the products of the masses and frequencies Just like this:</span>

<span>0.903*267.8 + 0.097*270.9
When you add it the result is what you are looking for</span>
4 0
3 years ago
Phosphorus trichloride reacts with chlorine to form phosphorus pentachloride.
zalisa [80]

Answer:

[PCl₃] = [Cl₂] = 0.035M

[PCl₅] = 0.059M

Explanation:

Based on the chemical reaction, Kc is:

Kc = 49 = [PCl₅] / [PCl₃] [Cl₂]

<em>Where [] are the concentrations in equilibrium of each species</em>

<em />

The initial concentration of the reactants is:

[PCl₃] = [Cl₂] = 0.75mol / 8.0L =  0.094M

The reactants must be consumed whereas PCl₅ will be produced. That is:

[PCl₃] = [Cl₂] = 0.094M - X

[PCl₅] = X

<em>Where X is the reaction coordinate</em>

<em />

Replacing in Kc expression:

49 = [X] / [0.094 - X] [0.094 - X]

49 = [X] / 0.008836 - 0.188 X + X²

0.432964 - 9.212 X + 49 X² = X

0.432964 - 10.212 X + 49 X² = 0

Solving for X

X = 0.059M → Right solution

X = 0.15M → False solution. Will produce negative concentrations

Replacing:

[PCl₃] = [Cl₂] = 0.094M - 0.059M = 0.035M

[PCl₅] = 0.059M

<h3>[PCl₃] = [Cl₂] = 0.035M</h3><h3>[PCl₅] = 0.059M</h3>

5 0
3 years ago
7. Which of the following represents the largest mass?
Tamiku [17]

Answer:

 10kg = 10 x 1000 = 10,000g

Explanation:

To know the quantity with the largest mass, we have to express all the units in grams:

for: 2 x 10mg = 2 x 10 x 10⁻³ = 0.02g

       0.001kg = 0.001 x 1000 = 1g

       1 x 10⁵ng = 1 x 10⁵ x 10⁻⁹ = 0.0001g

       2 x 10²cg = 2 x 10² x 10⁻² = 2g

       10kg = 10 x 1000 = 10,000g

Note:

              10⁻ ¹      deci(d)

              10⁻²       centi(c)

              10⁻³       milli(m)

            10⁻⁹         nano(n)

            10³           kilo(k)

   

5 0
4 years ago
A square painting has a length of 62 cm.<br><br> What is the area of the painting?<br><br> cm²
svetlana [45]

Answer:3844 cm^2

Explanation:

62 squared since it is a square, and area is base times height

3 0
3 years ago
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