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Makovka662 [10]
3 years ago
9

there are tiny plants growing on rock fence after the several year . you observe something happened on the rock which of the fol

lowing describes your observations ? the plants the rock​
Chemistry
1 answer:
Bingel [31]3 years ago
5 0

it is moss

Explanation:

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Compare amplitudes, wavelengths, and frequencies of waves
mr_godi [17]

Answer:

The answer is option b.

Explanation:

Amplitude is the distance apart each wave is.

8 0
2 years ago
A student dissolves 3.9g of aniline (C6H5NH2) in 200.mL of a solvent with a density of 1.05 g/mL . The student notices that the
tino4ka555 [31]

Answer:

2.1 × 10⁻¹ M

2.0 × 10⁻¹ m

Explanation:

Molarity

The molar mass of aniline (solute) is 93.13 g/mol. The moles corresponding to 3.9 g are:

3.9 g × (1 mol/93.13 g) = 0.042 mol

The volume of the solution is 200 mL (0.200 L). The molarity of aniline is:

M = 0.042 mol/0.200 L = 0.21 M = 2.1 × 10⁻¹ M

Molality

The moles of solute are 0.042 mol.

The density of the solvent is 1.05 g/mL. The mass corresponding to 200 mL is:

200 mL × 1.05 g/mL = 210 g = 0.210 kg

The molality of aniline is:

m = 0.042 mol/0.210 kg = 0.20 m = 2.0 × 10⁻¹ m

5 0
3 years ago
Given the following balanced equation determine the amount of MgCl2 that can be produced from 65.0 grams of Mg. Mg + HCl -->
DedPeter [7]

Answer:

Mg + HCL --> MgCl2 + H2

mass 65.0 mass 257.26

RFM 24 RFM 95

moles 2.708 moles 2.708

Explanation:

mass of MgCl = 257.26 grams

4 0
2 years ago
What types of intermolecular forces are found in CH<br> 4
Sphinxa [80]
London dispersion forces
8 0
3 years ago
There are two types of physical changes and chemical reactions- endothermic and exothermic. On the diagram below, which picture
Agata [3.3K]

Answer:

it is b because its releases heat in to all directions and not b because it staying inside and not releasing anything :)

Explanation:

6 0
3 years ago
Read 2 more answers
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