There are 2 grams of sulfur and 0.45 grams of copper. What is the
percent composition of coppper in the sample.
A. 18.3 %
B. 5.44 %
C. 81.6 %
D. 1.25%

Answer:

B. Water quality

Explanation:

Answer:

It is a physical change, because you DID NOT chemically change the waters compound just by boiling it.

Explanation:

I hope this helps!

Answer:

Boiling is a physical change!

(Edited bc the person who commented told me it was physical and not to make anyone being confused when the look at this post so... yeah)

Answer:The electron has a negative charge and the proton has a positive charge, and these charges work against each other to make the electromagnetic force that holds the entire atom together.

Explanation:

This is the answer

Answer:

a)6.730×10⁻⁴

b)5×10⁴

c)3.010×10⁻⁶

d)1.3240×10²

e)2.232×10³

The given numbers in scientific notation are [tex]6.730 \times 10^{-4}[/tex], [tex]5.0 \times 10^4[/tex], [tex]1.3240 \times 10^2[/tex],  [tex]2.232 \times 10^3[/tex] and  [tex]2.232 \times 10^3[/tex], respectively.

Scientific notation is a way of expressing very large or very small numbers in a compact and convenient form.

To express a number in scientific notation, we need to write the number in the form: [tex]\rm a\times 10^b[/tex]

a) 0.0006730 can be written in scientific notation as [tex]6.730 \times 10^{-4}[/tex]. The decimal point was moved 4 places to the right, so the exponent is negative 4.

b) 50000.0 can be written in scientific notation as [tex]5.0 \times 10^4[/tex]. The decimal point was moved 4 places to the left, so the exponent is positive 4.

c) 0.000003010 can be written in scientific notation as [tex]3.010 \times 10^{-6}[/tex]. The decimal point was moved 6 places to the right, so the exponent is negative 6.

d) 132.40 can be written in scientific notation as [tex]1.3240 \times 10^2[/tex]. The decimal point was moved 2 places to the left, so the exponent is positive 2.

e) 2232 can be written in scientific notation as [tex]2.232 \times 10^3[/tex]. The decimal point was moved 3 places to the left, so the exponent is positive 3.

Therefore, [tex]6.730 \times 10^{-4}[/tex], [tex]5.0 \times 10^4[/tex], [tex]1.3240 \times 10^2[/tex],  [tex]2.232 \times 10^3[/tex] and  [tex]2.232 \times 10^3[/tex], are the scientific notation for the given numbers.

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Answer:

Elements

Explanation:

Atomic number is a property of elements

Answer:

all of the above

Explanation:

all of this is in the solar system

Explanation:

A compound's empirical formula tells you the smallest whole number ratio ,The molar mass tells you what the total mass of one mole

Answer:

18.888%

Explanation:

phosphorus

Explanation:

other are diatomic

Cl2

S2

Ne2

Answer:

thunderstorm

Explanation: The cumulus stage is the first stage in a thunderstorm and it involves clouds forming. We see the cloud that will become a thunderstorm as it is starting to form and grow. This is due to the rising levels of thermal energy.

Answer:hope this help

Explanation:

Answer:

The moles present in 60 g of calcium are 1.5 moles.

Answer:

In 60 grams there are 1,5 mols

Explanation:

Answer:

search it up

Explanation:

Answer:     Water dissolves nonpolar covalent  substances.

The Nonpolar substance which is nontoxic is better material to be used in making the hand warmers.

A hand warmer is a little substance which can be put in between the hands in order to heat them up. This is particularly of necessity in the cold weather when the hands are cold.

The chemist can distinguish the polar substance from the nonpolar substance by dissolving each substance in water. The polar substance will dissolve in water while the non polar substance will not dissolve in water.

Secondly, the two substances can be heated and the melting temperatures are observed. The ionic substance will melt at a much higher temperature than the nonpolar substance. The Nonpolar substance which is nontoxic is a  better material to be used in making the hand warmers.

Learn more about ionic compounds: https://brainly.com/question/9167977

Answer:

Cu Copper 63.546

Cl Chlorine 35.453

F Fluorine 18.998403

Explanation:

I don't know whether you asked for Cu or Cl so answered it both.

Answer:

Explanation:

Sodium bicarbonate,

NaHCO

3

, will decompose to form sodium carbonate,

Na

2

CO

3

, water, and carbon dioxide,

CO

2

2

NaHCO

3(s]

→

Na

2

CO

3(s]

+

CO

2(g]

+

H

2

O

(g]

Notice that you have a

2

:

1

mole ratio between sodium bicarbonate and sodium carbonate. This means that the reaction will produce half as many moles of the latter than whatever number of moles of the former underwent decomposition.

Use sodium carbonate's molar amss to determine how many moles you'd get in that sample

0.685

g

⋅

1 mole NaHCO

3

84.007

g

=

0.008154 moles NaHCO

3

Now, if the reaction were to have a

100

%

yield, it would produce

0.008154

moles NaHCO

3

⋅

1 mole Na

2

CO

3

2

moles NaHCO

3

=

0.004077 moles Na

2

CO

3

Use the molar mass of sodium carbonate to determine how many grams would contain this many moles

0.004077

moles

⋅

105.99 g

1

mole

=

0.4321 g Na

2

CO

3Sodium bicarbonate,

NaHCO

3

, will decompose to form sodium carbonate,

Na

2

CO

3

, water, and carbon dioxide,

CO

2

2

NaHCO

3(s]

→

Na

2

CO

3(s]

+

CO

2(g]

+

H

2

O

(g]

Notice that you have a

2

:

1

mole ratio between sodium bicarbonate and sodium carbonate. This means that the reaction will produce half as many moles of the latter than whatever number of moles of the former underwent decomposition.

Use sodium carbonate's molar amss to determine how many moles you'd get in that sample

0.685

g

⋅

1 mole NaHCO

3

84.007

g

=

0.008154 moles NaHCO

3

Now, if the reaction were to have a

100

%

yield, it would produce

0.008154

moles NaHCO

3

⋅

1 mole Na

2

CO

3

2

moles NaHCO

3

=

0.004077 moles Na

2

CO

3

Use the molar mass of sodium carbonate to determine how many grams would contain this many moles

0.004077

moles

⋅

105.99 g

1

mole

=

0.4321 g Na

2

CO

3

By using the given data, the percent yield for sodium carbonate (Na₂CO₃) is equal to 127.

Percent yield of any data can be calculated as:

% yield = (Actual value / Theoretical value) × 100

In the question actual yield of sodium carbonate is given, which is equal to 2.04 grams. And in the table theoretical yield of sodium carbonate also given, which is equal to 1.60 grams.

Now putting these value in the above equation, we get:

% yield = (2.04 / 1.60) × 100 = 127

Hence, percent yield of sodium carbonate (Na₂CO₃) is 127.

To learn more about percent yield, visit the below link:

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Answer:

Eliptical

Explanation:

While some orbits may seem circular, like Earth's, it is still an ellipse. Planets orbit stars in an elliptical shape, but some come very close to perfect circles. As for the other two, im certain you have never seen a triangular or spherical orbit. Hope this helps.

Answer:

E) Plants take carbon from the atmosphere

Explanation:

Plants are a vital part in keeping the air clean. They take in CO2, H2O, and sunlight to start processing photosynthesis. The carbon taken in by the plant still remains with it after it dies, thus, fossil fuels.  

Answer:

e is correct

Explanation:

Answer:

because I make eggs and they taste delicious

Answer:

Conclusion

Explanation:

Answer:

1.09 moles of NaOH

Explanation:

First of all, to calculate moles, you need to find the molar mass of NaOH.

Let us first find the molar mass of NaOH then.

Na = 23.0 amu

O = 16.0

H = 1.0

They are 1 nitrogen atom, 1 oxygen atom, and one hydrogen atom.

So do this.

23.0(1) + 16.0(1) + 1.0(1) = 40 g/mol.

Now use dimensional analysis to show your work

43.5 g of NaOH * 1 mol of NaOH / 40 g/mol of NaOH

The grams cancel out.

43.5 / 40.0 = 1.0875

Use sig figs and round the answer to the nearest hundredths place.

1.0875 = 1.09

So the final answer is 1.09 moles of NaOH

Hope it helped!

Answer:

pretty sure it's false

Explanation:

hope this helps!

Answer:

Liquids

Explanation:because animals like dolphins use sound radiation under water to hear each other

Answer:

D. all of these.

Explanation:

it can travel through solids, liquids, and gasses.

Answer:

See explanation

Explanation:

Number of moles of glucose in 566g = 566g/180g/mol = 3.14 moles

Number of moles of oxygen atoms in 1 mole of glucose= 6 * 16g/16g/mol = 6 moles.

There are 6 moles of oxygen in 1 mole of glucose

x moles of oxygen is therefore present in 3.14 moles of glucose

x = 6 * 3.14/ 1 = 18.84 moles of oxygen

1 mole of oxygen  contains 6.02 * 10^23 atoms of oxygen

18.84 moles of oxygen contains 18.84 *  6.02 * 10^23 atoms = 1.14 * 10^25 atoms of oxygen.

Number of moles of sodium hydroxide in 43g of NaOH = 43g/40g/mol = 1.075 moles

1 mole of NaOH contains 6.02 * 10^23 molecules of NaOH

1.075 moles of NaOH contains 1.075 moles  * 6.02 * 10^23 molecules / 1 mole of NaOH = 6.47 * 10^23 molecules of NaOH

Number of moles of atoms fluorine in SF6 = 6 * 19 g/19 g/mol = 6 mole of F atoms

1 mole of SF6 contains 6.02 * 10^23 molecules of SF6

x moles of SF6 contains 5.5 x 10^24 molecules of SF6

X = 5.5 x 10^24 molecules * 1/ 6.02 * 10^23 molecules

X = 9 moles of SF6

If 1 mole of SF6 contains 6 atoms of F

9 moles of SF6 will contain 9 * 6/1 = 54 atoms of F

Answer:

2

Explanation: