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2 years ago

Place the following taxonomic ranks in order from most specific to least specific. A) Order; B) Phylum; C) Family

Chemistry

2 answers:

Troyanec [42]2 years ago

8 0

Answer:

Explanation:

b/c that is bad

Andrew [12]2 years ago

7 0

Here’s all of them: kingdom, phylum, classes, order, families, genus, and species

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Use the collision theory to explain the 3 ways you suggested to increase the rate of the following reaction: A strip of magnesiu

Lina20 [59]

Answer:

The rate of reaction of magnesium with hydrochloric acid. Magnesium reacts with dilute hydrochloric acid in a conical flask which is connected to an inverted measuring cylinder in a trough of water. The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph.

Explanation:

6 0

3 years ago

Upon combustion, a compound containing only carbon and hydrogen produces 2.67 g<img src="https://tex.z-dn.net/?f=CO_%7B2%7D" id=

Hoochie [10]

Answer:

$\boxed{\text{CH$_{2}$}}$

Explanation:

1. Calculate the mass of each element

$\text{Mass of C} = \text{2.67 g } \text{CO}_{2}\times \dfrac{\text{12.01 g C}}{\text{44.01 g }\text{CO}_{2}}= \text{0.7286 g C}\\\\\text{Mass of H} = \text{1.10 g }\text{H$_{2}$O}\times \dfrac{\text{2.016 g H}}{\text{18.02 g } \text{{H$_{2}$O}}} = \text{0.1231 g H}$

2. Calculate the moles of each element

$\text{Moles of C = 0.7286 g C}\times\dfrac{\text{1 mol C}}{\text{12.01 g C }} = \text{0.060 67 mol C}\\\\\text{Moles of H = 0.1231 g H} \times \dfrac{\text{1 mol H}}{\text{1.008 g H}} = \text{0.1221 mol H}$

3. Calculate the molar ratios

Divide all moles by the smallest number of moles.

$\text{C: } \dfrac{0.06067}{0.06067}= 1\\\\\text{H: } \dfrac{0.1221}{0.06067} = 2.015$

4. Round the ratios to the nearest integer

C:H = 1:2

5. Write the empirical formula

The empirical formula is $\boxed{\text{CH$_{2}$}}$

8 0

3 years ago

Which one of the following processes produces a decrease in the entropy of the system?a, precipitation of AgCl(s) from Ag+(aq) a

Usimov [2.4K]

Answer: precipitation of $AgCl(s)$ from $Ag^+(aq)$ and $Cl^-(aq)$ ions in solution

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

$\Delta S$ is positive when randomness increases and $\Delta S$ is negative when randomness decreases.

a) precipitation of $AgCl(s)$ from $Ag^+(aq)$ and $Cl^-(aq)$ ions in solution : As ions are getting solidified, entropy decreases.

b) dissolution of $LiOH(s)$ in water: The compounds dissociates into ions, entropy increases.

c) melting solid gold into liquid gold: The randomness increases, entropy increases.

d) evaporation of Hg(l) to form Hg(g) : The randomness increases, entropy increases.

e) mixing of two gases into one container : The randomness increases, entropy increases.

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3 years ago

Both artists and scientists contribute to our understanding of the world around us. Identify the ways that

LUCKY_DIMON [66]

Answer:

I deeply believe that it would be options 1, 2, and 4? Sorry if i'm wrong and good luck!

3 0

3 years ago

Read 2 more answers

What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)?

baherus [9]

1 mole ----------- 22.4 L ( at STP )
3.5 mols --------- ?

V = 3.5 x 22.4 / 1

V = 78.4 L

hope this helps!

4 0

3 years ago