Look at this picture of a whale shark.Which question about whale sharks is nonscientific?
A) What do whale sharks eat?
B) How big is the average whale shark’s mouth?
C) Does a whale shark like having a large mouth?
D)What happens to the water that enters a whale shark’s mouth?
Chemistry Honors College level
10th grader
Answers
Answer:
The nonscientific question about whale sharks is
C) Does a whale shark like having a large mouth?
This question asks for the subjective preference of a whale shark, which cannot be determined scientifically since we cannot directly communicate with the animal. Scientific questions are typically based on observable facts and measurable data.
Explanation:
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750 decagrams is then equivalent to 750*10 grams, which is also 7500 grams (it's also 7.5 kg).
How much oxygen is used up in grams?
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H₂O = 18.0 g/mol
O₂ = 32.0 g/mol
2 C₄H₁₀ + 13 O₂ = 8 CO + 10 H₂O
13 x 32.0 g O₂ ------------- 10 x 18.0 g H₂O
? g O₂ ------------- 2.46 g H₂O
Mass O₂ = 2.46 x 13 x 32.0 / 10 x 18.0
Mass O₂ =1023.36 / 180
=> 5.68 g of O₂
hope this helps!
Carbon disulfide is formed by a direct reaction of carbon and sulfur. At room temperature, CS2 is a colorless liquid with an offensive odor. Carbon disulfide vapors are flammable.
59 Identify one physical property and one chemical property of CS2. [1]
Answers
Answer: Physical property of is state of matter (liquid) and it is a chemical compound.
Explanation:
Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.
Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.
Carbon disulfide is the compound which is formed by the chemical combination of carbon and sulfur atoms. The equation for this follows:
The chemical property of carbon disulfide is different from that of carbon and sulfur. Thus, this is a chemical compound.
It is given, that this compound is a colorless liquid, which means that the state of this compound is liquid state.
Hence, physical property of is state of matter (liquid) and it is a chemical compound.
The physical property of carbon disulfide is that at room temperature, CS2 is a colorless liquid with an offensive odor. The chemical property of carbon disulfide is that it is formed by a direct reaction of carbon and sulfur.
Answers
Answer: Option (c) is the correct answer.
Explanation:
Moh's scale is used to detect the harness of a mineral. This scale displays harness of 10 minerals.
According to Moh's scale, the hardness of minerals given in the option are as follows:
- Topaz = 8
- Talc = 1
- Diamond = 10
Graphite is not included in Moh's scale.
Thus, we can conclude that the hardest known mineral is diamond.
Answers
Answers
Answer:
Explanation:
In chemistry, elements and compounds are distinct types of substances with fundamental differences:
**Elements:** Elements are the simplest and purest substances in chemistry, consisting of only one type of atom. Atoms are the building blocks of matter, and each element is defined by the number of protons in the nucleus of its atoms. Elements are listed on the periodic table, where each element is represented by a unique chemical symbol. They cannot be broken down into simpler substances by chemical reactions. For example, oxygen (O), carbon (C), and gold (Au) are all elements.
**Compounds:** Compounds, on the other hand, are substances formed when two or more different elements chemically combine in fixed ratios. These combinations involve chemical bonds, where atoms share electrons or transfer them to achieve stable electron configurations. Compounds have unique chemical formulas that represent the types and numbers of atoms in the compound. Unlike elements, compounds can be broken down into their constituent elements through chemical reactions. A classic example is water (H2O), which is a compound composed of two hydrogen atoms and one oxygen atom.
In summary, elements are pure substances composed of identical atoms, while compounds are substances formed by the chemical combination of two or more different elements in fixed ratios. Elements are found on the periodic table and cannot be broken down further by chemical means, whereas compounds can be decomposed into their constituent elements through chemical reactions.
Answer:
Explanation:
In chemistry, elements and compounds are distinct types of substances with fundamental differences:
**Elements:** Elements are the simplest and purest substances in chemistry, consisting of only one type of atom. Atoms are the building blocks of matter, and each element is defined by the number of protons in the nucleus of its atoms. Elements are listed on the periodic table, where each element is represented by a unique chemical symbol. They cannot be broken down into simpler substances by chemical reactions. For example, oxygen (O), carbon (C), and gold (Au) are all elements.
**Compounds:** Compounds, on the other hand, are substances formed when two or more different elements chemically combine in fixed ratios. These combinations involve chemical bonds, where atoms share electrons or transfer them to achieve stable electron configurations. Compounds have unique chemical formulas that represent the types and numbers of atoms in the compound. Unlike elements, compounds can be broken down into their constituent elements through chemical reactions. A classic example is water (H2O), which is a compound composed of two hydrogen atoms and one oxygen atom.