After using loops, swabs, toothpicks, spreaders or any other equipment to transfer cultures, immerse the contaminated equipment in ______.pure bleach
a strong acid
tap water
All of the above
Answers
Answer:
Explanation:
pure bleach b/c that is was helps destroy the bacteria
Final answer:
After transferring cultures with any equipment, it is best to immerse the equipment in pure bleach. Bleach is a strong disinfectant that can efficiently destroy various types of microorganisms.
Explanation:
After using loops, swabs, toothpicks, spreaders or any other equipment to transfer cultures, the equipment should ideally be immersed in pure bleach. This is because pure bleach effectively destroys many types of microorganisms found in these cultures. Pure bleach is a strong disinfectant that kills bacteria, viruses, and fungi, reducing the risk of spreading these organisms in the lab. Pouring bleach over the equipment can remove most of these organisms, but immersion guarantees thorough decontamination.
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Answers
Hope this helps!
Answers
ionic compounds lose or gain electrons to become stable.
ionic compounds are bonds between metals and nonmetals.
molecular or covalent compounds share one or more electrons to become stable.
molecular or covalent compounds are bonds between nonmetals.
Final answer:
An example of an ionic compound is sodium chloride (NaCl). An example of a molecular compound is carbon dioxide (CO2).
Explanation:
One example of an ionic compound is sodium chloride (NaCl), where sodium (Na) is a metal that forms a positively charged ion and chlorine (Cl) is a nonmetal that forms a negatively charged ion. The formula for a molecular compound is represented by carbon dioxide (CO2), where carbon (C) and oxygen (O) atoms share electrons to form covalent bonds.
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Answers
Answer:
The correct answer is Option (2)- Burning up of fossil fuels
Explanation:
Fossils are the remnants of the ancient plants and animals that were buried millions of years ago. Those fuels that are made up of these fossilized matters are commonly termed as fossil fuel. For example, Petroleum, Coal and natural gas. These are the major source of energy.
These fossil fuels are limited in amount and are non-renewable sources of energy. These are exploited rapidly by human beings. This burning up of fossil fuels leads to the production of a large amount of Carbon dioxide (CO₂) gas that causes a significant impact on the atmosphere. The increase in the CO₂ content also leads to an increase in the global temperature of the earth.
In the last 100 years, the CO₂ level in the atmosphere has immensely increased.
Hence, the correct answer is option (2).
(2) carbonate (4) peroxide
Answers
Carbonate ion contains the greatest number of oxygen atoms. So, the correct option is (2).
Polyatomic ion: refers to a charged chemical ion or species made up of two or more covalently joined atoms, or a metal complex that can be considered to behave as a single unit.
Acetate(C2H3O−) has two atoms of oxygen, carbonate has three oxygen atoms, hydroxide
has one, and peroxide (
)has two atoms of oxygen. Thus, carbonate has the highest number of oxygen atoms.
To know more about:-
Answer:
The correct answer is option 2, that is, carbonate.
Explanation:
A molecular ion, also known as a polyatomic ion, refers to a charged chemical ion or species comprising two or more atoms that are combined covalently, or of a complex of a metal, which can be regarded to be functioning as a single unit.
Of the given options, acetate has two atoms of oxygen, carbonate has three oxygen atoms, hydroxide has one, and peroxide has two atoms of oxygen. Thus, carbonate has the highest number of oxygen atoms.
Answers
Final answer:
Among the given figures, 2.5 x 10-2 L (or 25 mL when converted to milliliters) is the smallest volume.
Explanation:
The student is asked to compare and determine the smallest volume between 2500 mL, 250 cm3, 2.5 x 10-2 L, and 25 m3. First, let's convert all volumes into a common unit, the milliliter (mL).
- 2500 mL = 2500 mL (already in mL),
- 250 cm3 = 250 mL (since 1 cm3 equals 1 mL),
- 2.5 x 10-2 L = 0.025 L = 25 mL (since 1 L equals 1000 mL),
- 25 m3 = 25 x 1,000,000 L = 25 x 1,000 x 1,000,000 mL = 25,000,000,000 mL.
From this comparison, we can see that 2.5 x 10-2 L or 25 mL is the smallest volume among the given figures.
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