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2 years ago

15

The proper protective equipment for working with hazardous chemicals in the lab includes close lab coat goggles and a fume Hood

true or false

1 answer:

slavikrds [6]2 years ago

6 0

The answer is True, those items are essential for working with hazardous chemicals.

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12.Calculate the wavelength of an object moving with a velocity of 5 x105 m s-1

uranmaximum [27]

Answer:

Wavelength, $\lambda=3.3\times 10^{-18}\ m$

Explanation:

We have,

Velocity of the object, $v=5\times 10^5\ m/s$

Mass of the object, $m=4\times 10^{-22}\ kg$

It is required to find the wavelength of the object. The relation between wavelength and velocity of the object is given by :

$\lambda=\dfrac{h}{mv}$

h is Planck's constant

$\lambda=\dfrac{6.6\times 10^{-34}}{4\times 10^{-22}\times 5\times 10^5}\\\\\lambda=3.3\times 10^{-18}\ m$

So, the wavelength of the object is $3.3\times 10^{-18}\ m$ .

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3 years ago

How many types of alkanol do we have

oksano4ka [1.4K]

I think you mean alcohol ? if so there are a few basic types including ethanol

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3 years ago

How many moles are in 155 grams of aluminum

Aliun [14]

Answer:

wads

Explanation:

wadsdw

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3 years ago

Which sub-atomic particle is NOT found at the center of the atom?

Ostrovityanka [42]

All the positive charge of an atom is contained in the nucleus, and originates from the protons. Neutrons are neutrally-charged. Electrons, which are negatively-charged, are located outside of the nucleus.

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3 years ago

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How do you represent a shared pair of electrons when drawing the Lewis structure of a covalent bond

nataly862011 [7]

Answer: Each pair of shared electrons is a covalent bond which can be represented by a dash.

Explanation:

In a Lewis dot structure, the central atom can share electrons through bonds with the surrounding atoms, and this can look like a dash between the atoms.

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3 years ago