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ruslelena [56]
3 years ago
11

A geologist visits an environment to make observations. The scientist predicts that the environment will undergo secondary succe

ssion. What did the geologist likely observe in the environment to draw this conclusion? Check all that apply a
The geologist saw rocks and gravel.
b
The geologist saw cooled lava flows.
c
The geologist saw remaining soil.
d
The geologist saw a few plant species.
e
The geologist saw a few small insects.
Chemistry
2 answers:
Gelneren [198K]3 years ago
7 0

Answer:

b c and e

Explanation:

harry styles said so

kow [346]3 years ago
6 0

Answer:

b c e

Explanation:

i did it

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if only 0.264 g of ca(oh)2 dissolves in enough water to give 0.178 l of aqueous solution at a given temperature, what is the ksp
Maurinko [17]

The ksp value for calcium hydroxide at this temperature is 5.20 × 10⁻⁶.

<h3>What is ksp?</h3>

Ksp is an equilibrium constant of a solid substance dissolved in a liquid solution.

Given that, the volume of water is 0.178 l, 0.264 g of Ca(OH)² dissolves in enough water

The solution equilibrium is

Ca(OH)² = Ca + 2OH

The molar solubility is

0.186 / 74.00  / 0.230 = 0.0109 M

The ksp value will be

Ksp = (s) (2S)²

Putting the values in the formula

(0.0109) x (2 x 0.0109)² = 5.20 × 10⁻⁶.

Thus, the ksp value for calcium hydroxide is 5.20 × 10⁻⁶.

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brainly.com/question/27132799

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8 0
1 year ago
Write a procedure that you would follow to demonstrate the effect of increasingly higher concentrations of hydrochloric acid on
Hitman42 [59]
The reaction would produce bubbles of gas.

We can prepare 3-5 test tubes of acid with increasing concentrations. Then, we add antacid tablets to each and note the time taken for the tablet to dissolve and stop producing bubbles. The lesser the time taken, the greater the rate of reaction.
7 0
3 years ago
Determine the standard enthalpy of formation in kJ/mol for NO given the following information about the formation of NO2 under s
Zarrin [17]

Answer:

90.3 kJ/mol

Explanation:

Let's consider the following thermochemical equation.

2 NO(g) + O₂(g) → 2 NO₂(g)  ∆H°rxn = –114.2 kJ

We can find the standard enthalpy of formation for NO using the following expression.

∆H°rxn = 2 mol × ΔH°f(NO₂(g)) - 2 mol × ΔH°f(NO(g)) - 1 mol × ΔH°f(O₂(g))

∆H°rxn = 2 mol × ΔH°f(NO₂(g)) - 2 mol × ΔH°f(NO(g)) - 1 mol × 0 kJ/mol

∆H°rxn = 2 mol × ΔH°f(NO₂(g)) - 2 mol × ΔH°f(NO(g))

ΔH°f(NO(g)) = (2 mol × ΔH°f(NO₂(g)) - ∆H°rxn) / 2 mol

ΔH°f(NO(g)) = (2 mol × 33.2 kJ/mol + 114.2 kJ) / 2 mol

ΔH°f(NO(g)) = 90.3 kJ/mol

8 0
3 years ago
How do you get from mL to cm cubed
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Definition: Cubic centimeter. A cubiccentimetre (cm3) is equal to thevolume of a cube with side length of 1 centimetre. It was the base unit ofvolume of the CGS system of units, and is a legitimate SI unit. It is equal to a millilitre (ml).

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4 0
3 years ago
Add a nail in CuSO4 Sodium, the colour of CuSO4 disappears why?
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The iron nail displaces the Cu from the copper sulfate solution.  This results in the color of CuSO4's disappearance. Copper is less reactive than iron.

5 0
3 years ago
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