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3 years ago

Of all chlorine atoms, 75.771% are chlorine-35. Chlorine-35 atoms have

Chemistry

2 answers:

Gnom [1K]3 years ago

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djverab [1.8K]3 years ago

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I so sorry about this

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True or false? During a change of state the temperature of the substance does not change.

irakobra [83]

Answer:

false

Explanation:

the temperature of a substance can not remain constant as the substance changes from solid to liquid then finllay from liquid to gas. This is so because as a solid is heated it changes state and once it rechanges it boiling point it changes to gas or vapour.

8 0

2 years ago

What material beats and lets you get though all of earth’s layers?

Goryan [66]

Seismic waves

Explanation:

Seismic waves are disturbances that transmits energy elastically and let's scientist have a glimpse of the interior of the earth.

These waves can pass through any component layer of the earth due to their unique properties.

There are four types of seismic waves but the two body waves are the most important in studying the earth's interior.

Seismic p-waves can pass through any earth materials as they are longitudinal waves.
Seismic s-waves are shear waves and can only pass through solids. liquids and gases cannot be sheared.

learn more:

Seismograph brainly.com/question/11292835

#learnwithBrainly

6 0

3 years ago

How many moles are in 63 g of NH4 (molar mass= 18g)?

sdas [7]

To answer this question, all you to do is to divide the mass by the molar mass and that should get you your moles.

$=63g\ NH_{4}\ x\ \frac{1\ mol\ NH_{4}}{18g\ NH_{4}}$

= 3.5 mol NH₄

4 0

2 years ago

Read 2 more answers

What type of moon cycle do solar and lunar Eclipse occurs in

12345 [234]

Answer:

solar eclipses occur during a new moon, lunar eclipses occur during a full moon

7 0

3 years ago

What minimum mass of iron (II) nitrate must be added to 10.0 of a 0.0699 M phosphate solution in order to completely precipitate

ad-work [718]

Answer: The minimum mass of iron (II) nitrate that must be added is 0.188 grams

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Molarity of phosphate solution = 0.0699 M

Volume of solution = 10 mL = 0.010 L (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$0.0699M=\frac{\text{Moles of phosphate solution}}{0.010L}\\\\\text{Moles of phosphate solution}=(0.0699mol/L\times 0.010L)=6.99\times 10^{-4}mol$

The given chemical equation follows:

$2PO_4^{3-}(aq.)+3Fe(NO_3)_2(aq.)\rightarrow Fe_3(PO_4)_2(s)+6NO_3^-(aq.)$

By Stoichiometry of the reaction:

2 moles of phosphate solution reacts with 3 moles of iron (II) nitrate

So, $6.99\times 10^{-4}mol$ of phosphate solution will react with = $\frac{3}{2}\times 6.99\times 10^{-4}=1.049\times 10^{-3}mol$ of iron (II) nitrate

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of iron (II) nitrate = 180 g/mol

Moles of iron (II) nitrate = $1.049\times 10^{-3}$ moles

Putting values in above equation, we get:

$1.049\times 10^{-3}mol=\frac{\text{Mass of iron (II) nitrate}}{180g/mol}\\\\\text{Mass of iron (II) nitrate}=(1.049\times 10^{-3}mol\times 180g/mol)=0.188g$

Hence, the minimum mass of iron (II) nitrate that must be added is 0.188 grams

7 0

3 years ago