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3 years ago

Uses a special type of paper to separate liquids based on their different densities

Chemistry

1 answer:

MrMuchimi3 years ago

6 0

Chromatography hope it works!

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3. Determine the uses of the following materials:

hichkok12 [17]

Answer:

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3 years ago

Which element has the greatest electronegativity?

Alex Ar [27]

Fluorine has the highest. Fluorine's electronegativity is 4.0

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3 years ago

PLEASEEEEEE answer these 2 questions!! I WILL GIVE BRAINLIEST AND POINTS

Olegator [25]

Answer: B then D

Explanation:

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3 years ago

In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) 2 NaBr(aq) PbBr2(s) 2 NaNO3(aq)

lyudmila [28]

Answer : The mass of $NaBr$ is, 295.323 grams

Solution :

First we have to calculate the moles of $NaNO_3$ .

$\text{Moles of }NaNO_3=\frac{\text{Mass of }NaNO_3}{\text{Molar mass of }NaNO_3}=\frac{244g}{85g/mole}=2.87moles$

Now we have to calculate the moles of NaBr.

The balanced chemical reaction is,

$Pb(NO_3)_2(aq)+2NaBr(aq)\rightarrow PbBr_2(s)+2NaNO_3(aq)$

From the balanced reaction we conclude that

As, 2 moles of $NaNO_3$ react with 2 moles of $NaBr$

So, 2.87 moles of $NaNO_3$ react with 2.87 moles of $NaBr$

Now we have to calculate the mass of NaBr.

$\text{Mass of }NaBr=\text{Moles of }NaBr\times \text{Molar mass of }NaBr$

$\text{Mass of }NaBr=(2.87mole)\times (102.9g/mole)=295.323g$

Therefore, the mass mass of $NaBr$ is, 295.323 grams

7 0

3 years ago

Define a transverse wave

Mumz [18]

Transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.

4 0

3 years ago