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4 years ago

If the frequency of a wave is small the wavelength would be _, and the energy would be__.

Chemistry

1 answer:

nignag [31]4 years ago

6 0

Answer:

A or B

Explanation:

because the more times that the waves pass a certain distance in a certain time the smaller the wave will be. so the more waves that fit in it the shorter the wavelength.

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Calculate the energy required to heat of ethanol from to . Assume the specific heat capacity of ethanol under these conditions i

Marianna [84]

Answer:

17 kJ

Explanation:

Calculation for the Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.

Using this formula

q = mC∆T

Where,

q represent Energy

m represent Mass of substance=0.60kg=600g

C represent Specific heat capacity=2.44J·g−1K−1.

∆T represent change in Temperature=2.2°C to 13.7°C.

Let plug in the formula

q=(0.60 kg x 1000 g/kg)(2.44 J/gº)(13.7°C-2.2°C)

q = (600g)(2.44 J/gº)(11.5º)

q=16.836 kJ

q= 17 kJ (Approximately)

Therefore the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C will be 17 kJ

5 0

3 years ago

We are trying to build a good model of the _____________ that are happening on the tectonic plates under us.

Arturiano [62]

Answer:

scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.

Explanation:

i'm in the 7th grade

8 0

3 years ago

Select all the words that describe what the elements have in common if they are located on the same PERIOD.

Marrrta [24]

Answer:

Orbitals

Shells

Energy Levels

Explanation:

Elements in the same period will have the same energy levels which is the same as orbitals and shells.

The period of an element indicates the energy level in an atom.
Elements in period 1 will have one energy level or shell or orbitals.
Down a group this is not the case.
The energy level increases from top to bottom.
As we go down the group, we are transiting from one period to another.

4 0

3 years ago

Calculate the number of atoms present in each following 2 mol fe

Nezavi [6.7K]

Hope this helps you.

7 0

3 years ago

(a)-Use Lewis symbol store present there action that occurs between Ca and F atoms. (b)-What is the chemical formula of the most

Charra [1.4K]

Answer:

(a) The Lewis structure is shown in the image below.

(b) $CaF_2$

(c) Calcium loses 2 electrons to 2 atoms of fluorine and these 2 atoms of fluorine accepts each electron to form ionic bond.

(d) Calcium atom loses electrons.

Explanation:

Calcium is the element of second group and forth period. The electronic configuration of Calcium is - 2, 8, 8, 2 or $1s^22s^22p^63s^23p^64s^2$

There are 2 valence electrons of Calcium.

Fluorine is the element of group 17 and second period. The electronic configuration of the element fluorine is - 2, 7 or $1s^22s^22p^5$

There is 1 valence electron of fluorine.

The Lewis structure is drawn in such a way that the octet of each atom is complete.

Thus, calcium loses 2 electrons to 2 atoms of fluorine and these 2 atoms of fluorine accepts each electron to form ionic bond. This is done in order that the octet of the atoms are complete and they become stable.

Thus, the formula of calcium chloride is $CaF_2$ .

(a) The Lewis structure is shown in the image below.

(b) $CaF_2$

(c) Calcium loses 2 electrons to 2 atoms of fluorine and these 2 atoms of fluorine accepts each electron to form ionic bond.

(d) Calcium atom loses electrons.

5 0

3 years ago

If the frequency of a wave is small the wavelength would be _____, and the energy would be______.

If the frequency of a wave is small the wavelength would be _, and the energy would be__.