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3 years ago

1 through 5 plz it's due tomorrow

Chemistry

1 answer:

Stolb23 [73]3 years ago

5 0

1. Phase
2. Waxing
3. Waning
4. new moon
5. Motion of the moon around the earth causes to have phase

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6. What is the atomic mass of Hafnium if out of every 200 atoms, 10 have mass 176.00 g/mol, 38 have mass

Zinaida [17]

Answer:

ttyhjj

Explanation:

4 0

3 years ago

What is the volume of 193 g of gold

Greeley [361]

Remember:
Density = mass/volume
Volume = mass/density
Volume = 193 g/ 19.3 g cm ^ -3
Volume = 10 cm^3

6 0

3 years ago

An naoh solution contains 1.90 mol of naoh, and its concentration is 0.555 m. what is its volume?

Firlakuza [10]

0.555 = 1.90/V
⇒ V = 1.90/0.555
⇒ V = 3.423 liter

6 0

3 years ago

What's the force between two moving objects that are touching called

m_a_m_a [10]

I think it is friction.

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4 years ago

One of the emission lines that provides the green color in fireworks, which com s from barium salts, has a wavelength of 505nm.

PSYCHO15rus [73]

Explanation:

(a)

The relation between frequency and wavelength is shown below as:

$c=frequency\times Wavelength
$

c is the speed of light having value $3\times 10^8\ m/s$

Given, Wavelength = 505 nm

Also, 1 m = $10^{-9}$ nm

So,

Wavelength = $505\times 10^{-9}$ m

Thus, Frequency is:

$Frequency=\frac{c}{Wavelength}$

$Frequency=\frac{3\times 10^8}{505\times 10^{-9}}\ Hz$

$Frequency=5.94\times 10^{14}\ Hz$

(b)

Also, $E=\frac {h\times c}{\lambda}$

Where,

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

c is the speed of light having value $3\times 10^8\ m/s$

So,

$E=\frac{6.626\times 10^{-34}\times 3\times 10^8}{505\times 10^{-9}}\ J$

$E=\frac{10^{-26}\times \:19.878}{10^{-9}\times \:505}\ J$

$E=3.94\times 10^{-19}\ J$

(c)

Electromagnetic spectrum is range of the frequencies and their respective wavelengths of the various type of the electromagnetic radiation.

In order of the increasing frequency and the photon energy and the decreasing wavelength the spectrum are:

Red , Orange, Yellow, Green, Blue, Indigo, Violet

Increasing wavelength is the opposite trend. Thus, The longest visible wavelength is red and the shortest is violet.

6 0

3 years ago