A solute is a solid which dissolves in a solvent. Muddy water contains water and soil, soil does not dissolve in water
15. the concentration cannot be increased.
16. heterogenous mixtures
17. chocolate chip cookies
18. vegetable soup
19. a mixture is a pure substance a compound is not
20. Tastes sour
1. Why is a homogeneous mixture not considered a pure substance?A pure substance can be separated by chemical means, while a mixture can be separated by physical means.
2. What is true if mass is conserved in a reaction?There are equal numbers of atoms on both sides.
3. Methane reacts with oxygen then what are the products?carbon dioxide and water
4. Which one of the following is not a homogeneous mixture?vegetable soup
5. The substance is not uniform in appearance and each part of the mixture contains a combination of different ingredients in different ratios.heterogeneous mixtures
6. If a solution is saturated, which of these is true?More solvent can be dissolved
7. Which of these substances are molecules?All compounds are molecules but not all molecules are compounds. Molecular oxygen (O2) and molecular nitrogen (N2) are not compounds because each is composed of a single element. So correct option is 3 and 4.
8. What makes a solution a homogeneous mixture?It is uniform in composition.
9. When a solute is added to a solution, why does it remain homogeneous?The solute dissolves.
10. The chemical formula of glucose is C6H12O6, so it is classified as a(n)pure substance.
11. How many chlorine (Cl) atoms would be in 4 molecules of salt (4 NaCl)?4
12. In a solution of salt and water, which component is the solute?Salt
13. These substances are all H2O2, Li , NaCl , O2Pure Substances
14. If you have 5 grams of product after a chemical reaction, how many grams of reactants did you have at the start of the reaction?5
15. What is the difference between a compound and a mixture?A compound is a pure substance, but a mixture is not.
16. A firework exploding would be an example of a(n) .Exothermic reaction
17. If Lavoisier heated 100 grams of powdered mercuric oxide to produce 93 grams of liquid mercury, how much oxygen would be released?
2HgO ==> 2Hg + O2
Mass of HgO = 100 g
Molar mass of HgO = 216.59 g/mol
Moles = mass/molar mass = 0.46 moles
From balance chemcial equation
HgO : O2
2 = 1
0.46 = (1 × 0.46 ) ÷ 2 = 0.23 moles
mass of O2 = moles× molar mass = 0.23 × 32 = 7.36 g
18. Using the Law of Conservation of Matter, determine the number of grams of iron sulfide (FeS) that will be produced in this reaction.
12g Fe + 64g S → g FeSAccording to Law of Conservation of Matter, The total mass of reactant is equal to total mass of product , so the number of grams of iron sulfide (FeS) that will be produced in this reaction as follow.
12 + 64 = 76 g of FeS
Hope this Help.
23 would be
B) Endothermic reaction
because it is hotter than its surroundings
The answer is carbon dioxide and water. A product is what is formed by a chemical reaction. Reactants are the elements or compounds at the start of the reaction A chemical reaction mostly involves the exchange of atoms such as in this case where its shown in the equation below
CH4 + 2O2 - CO2 + 2H2O
The answer is Energy is absorbed making it feel colder. In an endothermic reaction, the enthalpy of the products is higher than that of the products, hence the enthalpy change is positive. This means that the chemical reaction absorbs heat from the environment.
The answer is a precipitate. A precipitate is formed when the one or mo0re of the products in the chemical reaction is insoluble and mostly settles down to the bottom of the reaction container of suspends in the solution. Precipitation is used as a significant indicator in particular chemical reactions.
The answer is Electrons are shared in a covalent bond. The covalent bond between two atoms allows the atoms to share pairs of electrons to reach a stable electron configuration in their valence orbital. In an ionic bond, one atom (mostly a metal) donates its electron to the other atom (mostly a halogen) so both have stable electron configurations.
The answer is 2. This is shown in the chemical formula of a water molecule (H2O). The subscript shows the number of hydrogen atoms in one water molecule. This occurs when an oxygen atom forms covalent bonds with two hydrogen atoms so it shares a pair of electrons with each hydrogen to reach stable electron configuration in their valence orbitals.
The answer is 4. The number in front of the molecule means there are 4 molecules of Sodium Chloride. There are no subscripts within the molecule meaning there is one (1) atom of Na and one (1) atom of Cl in the molecule. Therefore, there are four (4) atoms of sodium and four (4) atoms of chlorine in four (4) molecules of sodium chloride.
The answer is the law of conservation of mass. Law of conservation stipulates that energy and matter cannot be destroyed or created. This is the first law of thermodynamics that states that it can only be transformed from one form to another. In the reaction, since the number of atoms is conserved, the law of conservation (of matter in this case) has been observed.
The answer is 5. As stated in the previous question, chemical reactions observe the law of conservation stipulated in the first law of thermodynamics. Matter and energy cannot be created or destroyed but can only be transformed from one form to another. Chemical reactions only involve the exchange of atoms. Only in nuclear reactions that elements are transformed.
The answer is 3. Balancing the equation ensures that the law of conservation is observed. Since matter cannot be destroyed or created in a chemical reaction, the number of atoms of an element in the products and reactant must be the same. Therefore putting three (3) balances the equation since the number of hydrogens (H) in the products balances with the six (6) in the HCl in the reactants. The three (3) will also balance the number of oxygen atoms between the products and reactants.
The answer is oxygen. An element is a substance that is composed of purely one type of atoms. Oxygen is only composed of oxygen atoms while the rest are mixtures of atoms from different elements (hence are compounds).
1. Carbon dioxide and water
3. A precipitate
4. Electrons are shared in a covalent bond
5. 2 Hydrogen atoms
6. 4 Cl atoms
7. I believe is law of conservation of atoms
8. 5 grams
9. 3 should be placed
11. Apple juice
12. It is uniform in composition
15. The concentration cannot be increased
16. Heterogenous mixture
17. Chocolate chip cookies
18. Vegetable soup
19. A compound is a pure substance but a mixture is not
20. Tastes sour.
Can you provide brainliest.