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uysha [10]
3 years ago
10

If all atoms are composed of the same particles, how can there be more than 100 different elements?

Chemistry
1 answer:
lions [1.4K]3 years ago
4 0

Answer:

The number of protons determine the type of atom

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The table below shows the content in mg of some chemical elements found in 100g of milk:
garri49 [273]

Answer:

... chloride, calcium, potassium, and zinc was signifi- ... of cow and goat milk pasteurization on element retention ... certified American Chemical Society (ACS);. Whatman ... goat milk. Table 2 gives the content of 17 elements of ... found .0026 rag/100 g in raw and .0024 mg/100 ... mg/100 g chloride content (27) and another.

5 0
3 years ago
Several properties of the element magnesium are shown. Which one is a chemical property?
aniked [119]

Answer:

E

Explanation:

burning a substance changes it chemically.

4 0
3 years ago
Which of the following terms is a term that could refer to heterogeneous matter? a. element b. mixture c. compound d. solution
kupik [55]

Answer : b. mixture

<h3>Further explanation</h3>

Element and compound are included in pure substance where the composition is the same in each part

Elements are made up of 1 type of atom, while the compounds of 2 or more types of atoms , both can be represented in the form of chemical symbols

A mixture is a combination of substances. The properties of a substance in the mixture component are unchanged

The mixture can be a homogeneous mixture or a heterogeneous mixture

  • the homogeneous mixture if each part has the same composition
  • the heterogeneous mixture if each part has a different composition

Solution including into Homogeneous mixture, while suspension into a heterogeneous mixture

So a term that could refer to heterogeneous matter : b. mixture

6 0
3 years ago
Be sure to answer all parts. A mixture of CO2 and Kr weighs 47.9 g and exerts a pressure of 0.751 atm in its container. Since Kr
ololo11 [35]

Answer:a)  Mass of CO_2 in mixture = 26.3 grams

b) Mass of Kr in mixture that can be recovered= 21.5 grams

Explanation:

Given :

Total Pressure = pressure of krypton + pressure of carbon dioxide = 0.751 atm

pressure of krypton = 0.231 atm

Thus pressure of carbon dioxide = 0.751 - 0.231 =0.52 atm

As we know:

p=x\times P

where,

p = partial pressure

P = total pressure = 0.751 atm

x = mole fraction

For CO_2

x_{CO_2}=\frac{p_{CO_2}}{P}=\frac{0.52}{0.751}=0.70

{\text {Mass of} CO_2}=moles\times {\text {Molar mass}}=0.70\times 44=30.8g

For Kr

x_{Kr}=\frac{p_{Kr}}{P}=\frac{0.231}{0.751}=0.30

{\text {Mass of} Kr}=moles\times {\text {Molar mass}}=0.30\times 84=25.2g

Total mass = Mass of CO_2 + Mass of krypton = 30.8 + 25.2 = 56 g

Percentage of CO_2=\frac{30.8}{56}\times 100=55\%

a) Thus Mass of CO_2 in mixture =\frac{55}{100}\times 47.9=26.3g

Percentage of Kr=\frac{25.2}{56}\times 100=45\%

b) Thus Mass of Kr in mixture that can be recovered=\frac{45}{100}\times 47.9=21.5g

7 0
3 years ago
Which of the following is a characteristic shared by all living things?
Annette [7]
Answer; it’s either d or a. If it was be I would pick A. Not sure
3 0
3 years ago
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