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adoni [48]
4 years ago
9

The Transition Elements can be divided into two types. List each type.

Chemistry
1 answer:
jenyasd209 [6]4 years ago
7 0
Main group elements
transition metals
lanthanides
actindes.
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You are examining decomposition of corn leaves following the growing season on a farm. To do this, you place 33 g of corn leaves
m_a_m_a [10]

Answer:

c. 9.94 g

Explanation:

From the question,

Using

mt = m₀e⁻kt.................... Equation 1

Where mt = mass of the leaf remaining in the bag, m₀ = original mass of leave that was placed in the bag, k = decay constant, t = time.

Given: m₀ = 33 g, k = 0.04, t = 30 days.

Substitute into equation 1

mt = 33(e⁻(0.04ˣ30))

mt = 33e⁻¹²/¹⁰

mt = 33/e¹²/¹⁰

mt = 33/3.320

mt = 9.94 g.

Hence the right answer is c. 9.94 g

8 0
4 years ago
The structure of the Earth is divided into four major components: the crust, the mantle, the outer core, and the inner core.
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It is true, they are the 4 main layers.
3 0
3 years ago
A molecule is known to have a molar absorptivity of 18,650 at a certain wavelength. A spectrometer is tuned to this wavelength a
iren2701 [21]

Answer:

17,932.69 g/mol is the molecular weight of the substance.

Explanation:

Using Beer-Lambert's law :

Formula used :

A=\epsilon \times c\times l

where,

A = absorbance of solution = 1.04

c = concentration of solution =?

l = length of the cell = 1 cm

\epsilon = molar absorptivity of this solution = 18,650 M^{-1} cm^{-1}

Now put all the given values in the above formula, we get the molar absorptivity of this solution.

1.04=18,650 M^{-1} cm^{-1}\times c)\times (1cm)

c = 5.576\times 10^{-5} M

Concentration=\frac{\text{Mass of compound}}{\text{Molecular mass of compound}\times V}

V = Volume of the solution in L

Molecular weight of the substance = x

V = 100 mL = 0.1 L

Mass of the substance = 100 mg = 0.1 g

5.576\times 10^{-5} M=\frac{0.1 g}{x\times 0.1 L}

x = 17,932.69 g/mol

17,932.69 g/mol is the molecular weight of the substance.

6 0
3 years ago
I think one of them is rubber but i really dont know.
Tju [1.3M]

Answer:

Aluminam can, Iron nail and copper wire.

There one of the best insulators.

Explanation:

:) Pfft-

6 0
3 years ago
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What has mass?<br> A. Energy<br> B. Heat<br> C. Light<br> D. Matter
Mrrafil [7]

Answer:

matter

Explanation:

6 0
3 years ago
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