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3 years ago

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A chemical reaction in which one element replaces another element in a compound can be categorized as a

1 answer:

iren2701 [21]3 years ago

7 0

It could be characterized by “single displacement reaction” because in a chemical reaction one element replaces another element in a compound and is known as a single displacement reaction. And only one element has been displaced so thats why the word "single" is used also

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Describe an adaptation to a plant's life cycle and explain how this adaptation helps the plant survive. (2 points)

dusya [7]

Answer:

Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water.

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2 years ago

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What is the temperature difference if 300 cal are used to warm water

PIT_PIT [208]

Answer:

<u>The temperature difference is</u> $\frac{300}{m} Kkg^{-1}$

Explanation:

The formula that is to used is :

Δ $Q=ms$ Δ $T$

<em>where ,</em>

<em>Δ $Q$ is the heat supplied in calories = 300cal</em>
<em> $m$ is the mass of water taken = m (assumed)</em>
<em>Δ $T$ is the change in temperature</em>
<em> $s$ is the specific heat of water = $1calK^{-1}Kg^{-1}$ </em>

ΔT :

$\frac{300}{m*1} \\=\frac{300}{m} Kkg^{-1}$

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3 years ago

Choose the correct answer. The color of the iguana is an adaptation to its:

Lady_Fox [76]

Answer:

B

Explanation:

so that way they can hide away from the predators

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2 years ago

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What is the rate constant of a reaction if rate = 1 x 10-2 (mol/L)/s, [A] is 2 M,

boyakko [2]

The rate constant of a reaction : 8.3 x 10⁻⁴

<h3>Further explanation</h3>

Given

rate = 1 x 10⁻² (mol/L)/s, [A] is 2 M, [B] is 3 M, m = 2, and n = 1

Required

the rate constant

Solution

For aA + bB ⇒ C + D

Reaction rate can be formulated:

$\large{\boxed{\boxed{\bold{r~=~k.[A]^a[B]^b}}}$

the rate constant : k =

$\tt k=\dfrac{rate}{[A]^m[B]^n}\\\\k=\dfrac{1.10^{-2}}{2^2\times 3^1}\\\\k=8.3\times 10^{-4}$

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2 years ago

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The mass number of an atom can be calculated from the

11111nata11111 [884]

Mass number (A) =protons (p+) + neutrons(n°)

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2 years ago