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Mice21 [21]
3 years ago
12

How many moles are in 36 g of Beryllium (Be)?

Chemistry
1 answer:
Katarina [22]3 years ago
6 0
Answer is B 4 moles .
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When in history was the origin of Sci-Fi as<br> genre? <br><br> Why then?
sergejj [24]

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The term science fiction was popularized, if not invented, in the 1920s by one of the genre's principal advocates, the American publisher Hugo Gernsback. The Hugo Awards, given annually since 1953 by the World Science Fiction Society, are named after him.

Explanation:

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Reading Science
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B They go through many developmental changes.

Explanation:

According to the passage, development of frogs are susceptible to minor environmental changes due to the series of developmental changes they undergo.

During the developmental phase of a typical frog, several complicated cellular differentiation cycles occurs. These cycles are connected to one another and they are triggered by certain signals and responses. Disruption in certain environmental factors can affect the various developmental changes.

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3 years ago
8. True or False: There are some exceptions to the rule.... organisms such as a protist called a
ankoles [38]

There are some exceptions to the rule organisms such as a protist called a  euglena can be both heterotrophic and autotrophic. This is a true statement.

Explanation:

  • Euglena is a large genus of unicellular protists: they have both plant and animal characteristics
  • Photoautotrophs include protists that have chloroplasts, such as Spirogyra. Heterotrophs get their energy by consuming other organisms. Other protists can get their energy both from photosynthesis and from external energy sources
  • All live in water and move by means of a flag ellum. This is an animal characteristic. Most have chloroplasts, which are characteristic of algae and plants
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6 0
3 years ago
What mass of calcium carbonate is produced from 5.11<br> mol of sodium carbonate?
a_sh-v [17]

Answer:

There is 541.6 grams of calcium carbonate produced from 5.11 moles

Explanation:

Step 1: Data given

Number of moles of sodium carbonate ( Na2CO3) = 5.11 moles

Molar mass of sodium Carbonate:

⇒ Molar mass of Sodium = 22.99 g/mole

⇒ Molar mass of Carbon = 12.01 g/mole

⇒ Molar mass of Oxygen = 16 g/mole

Molar mass of Na2CO3 = 2* 22.99 + 12.01 + 3*16 = 105.99 g/mole

Step 2: Calculate mass of 5.11 moles of sodium carbonate

mass = number of moles of sodium carbonate * Molar mass of sodium carbonate

mass = 5.11 moles * 105.99 g/moles = 541.6 grams ≈ 542 grams

There is 541.6 grams of calcium carbonate produced from 5.11 moles Na2CO3

3 0
3 years ago
Coefficient in a sentence? In chemistry
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Answer:

Arrhenius has pointed out that the coefficient of affinity of an acid is proportional to its electrolytic ionization.

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