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Ann [662]
3 years ago
6

Frank has a paper clip. It has a mass of 9g and a volume of 3cm³. What is the density

Chemistry
2 answers:
Misha Larkins [42]3 years ago
7 0
3 g/cm^3
Characters more letters more characters more letters
bogdanovich [222]3 years ago
3 0

Answer:

i have to answer this for points :)

Explanation:

sorry

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Average atomic masses listed by IUPAC are based on a study of experimental results. Bromine has two isotopes 73 br and81 br, who
ddd [48]

<u>Answer:</u> The average atomic mass of element bromine is 80.4104 amu.

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i .....(1)

  • <u>For _{35}^{79}\textrm{Br}[/tex] isotope:</u>

Mass of _{35}^{79}\textrm{Br} isotope = 78.9183 amu

Percentage abundance of _{35}^{79}\textrm{Br} isotope = 50.69 %

Fractional abundance of _{35}^{79}\textrm{Br} isotope = 0.5069

  • <u>For _{35}^{81}\textrm{Br} isotope:</u>

Mass of _{35}^{81}\textrm{Br} isotope = 80.9163 amu

Percentage abundance of _{35}^{81}\textrm{Br} isotope = 49.31 %

Fractional abundance of _{35}^{81}\textrm{Br} isotope = 0.4931

Putting values in equation 1, we get:

\text{Average atomic mass of Bromine}=[(78.9183\times 0.5069)+(80.9163\times 0.4931)]

\text{Average atomic mass of Bromine}=80.4104amu

Hence, the average atomic mass of element bromine is 80.4104 amu.

5 0
3 years ago
Eugenol is a molecule that contains the phenolic functional group. Which option properly identifies the phenol in eugenol
givi [52]

Answer:

Explanation:

Hello,

Among the options given on the attached document, since phenolic functional group is characterized by a benzene ring bonded with a hydroxyl group (C₆H₅OH) we can see that the first option correctly points out such description. Thus, answer is on the second attached picture. Other options are related with other sections found in eugenol that are not phenolic.

Best regards.

3 0
4 years ago
PLEASE HELP CHEM BABES I HAVE BEEN CRYING FOR A WHILE NOW
slavikrds [6]

Answer: See below

Explanation:

1. To calculate the mass, you know you can convert by using molar mass. Since mass is in grams, we can use molar mass to convert moles to grams. This calls for the Ideal Gas Law.

Ideal Gas Law: PV=nRT

We manipulate the equation so that we are solving for moles, then convert moles to grams.

n=PV/RT

P= 100 kPa

V= 0.831 L

R= 8.31 kPa*L/mol*K

T= 27°C+273= 300 K

Now that we have our values listed, we can plug in to find moles.

n=\frac{(100kPa)(0.831L)}{(8.31kPa*l/molK)(300K)}

n=0.033mol

We use the molar mass of NO₂ to find grams.

0.033mol*\frac{46.005g}{1mol }=1.52 g

The mass is 1.52 g.

2. To calculate the temperature, we need to use the Ideal Gas Law.

Ideal Gas Law: PV=nRT

We can manipulate the equation so that we are solving for temperature.

T=PV/nR

P= 700.0 kPa

V= 33.2 L

R= 8.31 kPa*L/mol*K

n= 70 mol

Now that we have our values, we can plug in and solve for temperature.

T=\frac{(700kPa)(33.2L)}{(70mol)(8.31 kPa*L/molK)}

T=40K

The temperature is 40 K.

3 0
3 years ago
What is the mass of an atom with seven protons, seven neutrons, and seven electrons? Record and bubble in your answer below.
Irina-Kira [14]

Answer:

Mass would be 14 amu

Explanation:

7 0
3 years ago
Read 2 more answers
When taking ph measurements of solutions, why is it important to stir thoroughly after adding each reagent?.
Anon25 [30]
Mixing helps ensure that the measured pH is reflective of the entire solution
6 0
2 years ago
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