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2 years ago

Flammable liquids are those that have a flashpoint of:.

Chemistry

1 answer:

marin [14]2 years ago

5 0

Answer:

Flammable liquid is any liquid having a flashpoint at or below 199.4 °F (93 °C).

Explanation:

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How does the moon move

Llana [10]

Answer:

Earth's gravitational pull making it stay in orbit

Explanation:

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3 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

Chemistry compound empirical formula and identify compounds weightWhich drug is c3 h3 01

valkas [14]

The drug C3H30 is called allenolate / 1-hydroxycyclopropyl

weight is 55.06g/mol

5 0

1 year ago

Equivalencia de un año luz en SI

Aleksandr [31]

Hi uhh i've never really typed in Spanish but here I go! :)

Un ano luz es equivalente a 9.467 PM

4 0

3 years ago

What change in mass number occurs when a radioactive atom emits an alpha particle?

Alik [6]

The alpha particle is the helium nucleus.
The mass of helium nucleus (⁴₂He) is 4u.

The mass of radioactive atom decreases by 4u. Look at the reaction below:

²²³₈₈Ra ---> ⁴₂He + ²¹⁹₈₆Rn

6 0

3 years ago