How many moles are in 213 grams of NaCl?

Answers

Answer 1

Answer:

Answer:

There are 3, 64 moles of NaCl.

Explanation:

First we calculate the mass of 1 mol of NaCl, starting from the atomic weights of Na and Cl obtained from the periodic table. Then we calculate themoles in 213 grams of NaCl, making a simple rule of three:

Weight NaCl= Weight Na + Weight Cl = 23 g + 35, 5 g= 58, 5 g/ mol

58,5 g ------1 mol NaCl

213 g---------x= (213 g x 1 mol NaCl)/ 58, 5 g= 3, 64 mol NaCl

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What is the chemical reaction of Water breaks down into hydrogen and oxygen.

Answers

Answer:

electrolysis

Explanation:

i hope that helps you!

Electrolysis, because when an electric current is passed through liquid water it changes the water into two gases

1. What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m?

Answers

The wave speed of a wave consist of frequency of 100 Hz and a wavelength of 0.30 m is 30 m/s.

What is Wave speed of a wave?

Wave speed is referred to the distance a wave travels in a particular amount of time, such as the number of meters it travels per second.

Speed = wavelength (λ) × frequency (ν).

Given wavelength = 0.30 m and frequency= 100 Hz

Wave speed = 0.30 × 100 = 30 m/s

So, the wave speed of the wave is 30 m/s.

Learn more about wavelength, here:

brainly.com/question/7143261

Answer: The wave speed of the wave is 30 m/s

Explanation:

Wave speed is defined as the product of its wavelength and frequency.

Mathematically,

$\text{Wave speed}=\lambda* \nu$

where,

$\lambda$ = wavelength of the wave = 0.30 m

$\nu$ = frequency of the wave = 100 Hz = $100s^(-1)$

Putting values in above equation, we get:

$\text{Wave speed}=0.30m* 100s^(-1)\n\n\text{Wave speed}=30m/s$

Hence, the wave speed of the wave is 30 m/s

Scientists classify rocks into three different types. What is the main basis for the classification system they chose?

Answers

Answer:

The main basis for the classification system is the way rocks were formed. With these criteria there are three different types of rocks:

Igneous rocks : formed through the cooling and solidification of magma or lava

Sedimentary rocks : formed by the accumulation or deposition of small particles

Metamorphic rocks: formed by the transformation of existing rock types by heating and pressure

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that is it

Assessment timer and count Assessment items Item 3 What condition would most likely cause a decrease in the salinity of ocean water? freezing of glaciers extremely hot weather high rates of evaporation a river flowing into the sea

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Answer:

it's a river flowing into the sea

Explanation:

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Living things are classified by the characteristics they have in common.
______________________________________________________________________________
There are seven major levels of classification. Kingdom and Phylum are just two of the levels. Which of the following are also major levels of classification?

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Name the type of chemical reaction : CaO(s) + H2O(l) -----------Ca(OH)2(aq)

Answers

It is called Synthesis reaction

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