Before the work of Albert Einstein and other prominent scientists of the early 1900's, the predominant view among

Chemistry

1 answer:

Ivanshal [37]3 years ago

3 0

A wave.

Scientists now recognize that light can behave as both a particle and a wave.

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What is the main precaution to take if a gas cylinder sign is present in the lab? select one

Step2247 [10]

The main precautions to take if a gas cylinder sign is present in the lab visually check that the gas cylinder is restrained, but keep a safe distance from it. The correct option is c.

<h3>What are the precautions?</h3>

Precautions are the preventive steps that are taken to save yourself from any dangerous circumstances. These steps are always taken in doing experiments and other scientific procedures.

Here, the precautions are to check the gas cylinder.

Thus, the correct option is c, Visually check that the gas cylinder is restrained, but keep a safe distance from it.

To learn more about precautions, refer to the link:

brainly.com/question/15622844

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The question is incomplete. Your most probably complete question is given below:

Remove the strap from around the gas cylinder to use it in the lab.

Open the valve on the gas cylinder periodically to release pressure.

Visually check that the gas cylinder is restrained, but keep a safe distance from it.

Test out the regulator on the gas cylinder to make sure it is working properly.

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2 years ago

What is the balanced net ionic equation when aqueous solutions of Pb(NO3)2 and KBr are mixed and form a product

Mila [183]

Answer:

KBr+Pb(NO3)2=? is an equation you can use.

Explanation:

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3 years ago

In the reaction between Lithium Sulfate and an excess of Lead (II) Nitrate, how many molecules of Lithium Nitrate can be expecte

siniylev [52]

Answer:

$1.46x10^{23}molecules \ LiNO_3$

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$Li_2SO_4 + Pb(NO_3)_2 \rightarrow PbSO_4+2LiNO_3$

Thus, since lead (II) nitrate is in excess, we can directly compute the moles of lithium nitrate by applying the 1:2 molar ratio between them in the chemical reaction as well as the molar mass of Lithium Sulfate that is 110 g/mol for the stoichiometric shown below factor:

$n_{LiNO_3}=13.3gLi_2SO_4*\frac{1molLi_2SO_4}{110gLi_2SO_4} *\frac{2molLiNO_3}{1molLi_2SO_4} =0.242molLiNO_3$