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3 years ago

Convert 0.0598 to scientific notation

Chemistry

2 answers:

inn [45]3 years ago

8 0

I agree with the answer that the other guy gave you

ziro4ka [17]3 years ago

6 0

The scientific notation is 5.98 * 10^-2

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Rhodium, a metal used as a catalyst and in jewelry, currently sells for $1500. per troy ounce. If 6.022 x 10^23 rhodium atoms ha

USPshnik [31]

Answer:

$2.19 \times 10^{-4} \mathrm{Rh}$

Explanation:

Atomic mass of Nickel = 58.69 g/mol

Mass of 1 mole of nickel atom = 58.69 gm

Now, mass of 1 nickel atom = Gram atomic mass/Avogadro number

= $\frac{58.69}{6.023\times10^{22}} =9.744\times10^{23} g/atom$

Now, price of Rhodium =$1500 per troy ounce

Price of nickel in market = 0.577$/oz

No. of rhodium atoms needed to buy 1 nickel atom is

$9.744 \times 10^{-23} \mathrm{g} \times \frac{1 \mathrm{oz}}{31.1035 \mathrm{g}} \times \frac{0.577 \mathrm{s}}{1 \mathrm{oz}} \times \frac{1 \mathrm{oz}}{1500 \mathrm{s}}$

$\quad \times \frac{31.1035 \mathrm{g}}{1 \mathrm{oz}} \times \frac{6.023 \times 10^{23} \mathrm{Rh} \text { atoms }}{102.9 \mathrm{g}}=2.19 \times 10^{-4} \mathrm{Rh} \text { atoms }$

4 0

4 years ago

How many grams of zinc metal will react completely with 7.8 liters of 1.6 M HCl? Show all of the work needed to solve this probl

Andru [333]

<u>Answer:</u>

For 1: The correct answer is 407.97 grams.

For 2: The correct answer is 76.72 grams.

<u>Explanation:</u>

<u>For 1:</u>

We are given the molarity of HCl, to find the moles of HCl, we use the formula:

$Molarity=\frac{\text{Moles}{\text{Volume}}$

We are given:

Molarity = 1.6 M

Volume = 7.8 L

Putting values in above equation, we get:

$1.6mol/L=\frac{\text{Moles of HCl}}{7.8L}\\\\\text{Moles of HCl}=12.48mol$

For the given reaction:

$Zn(s)+2HCl(aq.)\rightarrow ZnCl_2(aq.)+H_2(g)$

By Stoichiometry of the reaction:

2 moles of HCl reacts with 1 mole of zinc metal.

So, 12.48 moles of HCl react with = $\frac{1}{2}\times 12.48=6.24mol$ of Zinc metal.

To calculate the mass of zinc metal, we use the formula:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Molar mass of Zinc metal = 65.38 g/mol

$6.24=\frac{\text{Mass of zinc metal}}{65.38g/mol}\\\\\text{Mass of zinc metal}=407.97g$

<u>For 2:</u>

We are given that 298 grams of 83.1 % by mass of iron (II) nitrate solution are present.

So, mass of Iron (II) nitrate solution will be = $\frac{83.1}{100}\times 298=247.638g$

Molar mass Iron (II) nitrate = 180 g/mol

Putting values in equation 1, we get:

$\text{Moles of }Fe(NO_3)_2=\frac{247.638g}{180g/mol}=1.37mol$

For the following reaction:

$2Al(s)+3Fe(NO_3)_2(aq.)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq.)$

By Stoichiometry of the reaction:

3 moles of $Fe(NO_3)_2$ produces 3 moles of iron metal.

So, 1.37 moles of $Fe(NO_3)_2$ will produce = $\frac{3}{3}\times 1.37=1.37mol$ of iron metal.

To calculate the mass of zinc metal, we equation 1:

$1.37=\frac{\text{Mass of iron metal}}{56g/mol}\\\\\text{Mass of iron metal}=76.72g$

5 0

3 years ago

Water has a higher specific heat index than other common materials, so it takes a lot of energy to raise the temperature of wate

Maurinko [17]

Answer: Areas surrounded by water would have less of a change in temperature

throughout the year.

Explanation: Water has a higher specific heat index so it's temperature will be slow to rise. Water also holds heat longer than most material hence areas sorrounsing water will have less temperature change throughout the year.

6 0

4 years ago

Gaseous ethane, C2H6, burns in the presence of oxygen

Gnesinka [82]

Moles of Carbon dioxide(CO2) = 2

<h3>Further explanation</h3>

Given

Reaction

2 C2H6 (g) + 7 O2 (g) —+ 4CO2 (g) + 6 H20 (g)

Required

moles of carbon dioxide

Solution

The reaction coefficient shows the mole ratio of the compounds in the reaction equation (reactants and products)

From the equation, mol ratio of C2H6 : CO2 = 2 : 4, so mol CO2 :

mol CO2 = (4/2) x mol C2H6

mol CO2 = 2 x 1

mol CO2 = 2

3 0

3 years ago

if you are given the number of molecules in an undentified chemical compound, can you calculate the number of moles

krok68 [10]

Divide it by avagardo's constant that should work as its the number of particles.

8 0

3 years ago

Convert 0.0598 to scientific notation​

Convert 0.0598 to scientific notation