Which ion is the only negative ion produced by an Arrhenius base in water?(1) NO3– (3) OH–
(2) Cl– (4) H–
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How many moles of calcium chloride would be produced by the reaction below when 53.2 milliliters of water are produced, if the density of water is 0.987 g/mL? Show all steps of your calculations as well as the final answer HCl + Ca(OH) 2 → H2O + CaCl2
Which compound contains both ionic and covalent bonds?(1) ammonia(2) methane(3) sodium nitrate(4) potassium chloride
In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?
Which group of nuclear emissions is listed in order of increasing charge?(1) alpha particle, beta particle, gamma radiation(2) gamma radiation, alpha particle, beta particle(3) positron, alpha particle, neutron(4) neutron, positron, alpha particle
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The basic form of matter is the atom. Atoms can be distinguished from each other and they are known as elements. When elements combined, they form compounds. The can either contain two or more elements. When you combined compounds of different types or classes, they form mixtures.
b. hydrogen bonding
c. chemical reaction
d. dissolving
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The process that changes one set of chemicals into another set of chemicals is called a chemical reaction. The correct answer is option c.
A chemical reaction is a process in which chemical bonds between atoms and molecules are broken and formed, resulting in the creation of new substances with distinct chemical properties.
In a chemical reaction, the reactants are the starting substances that react with each other, while the products are the new substances that are formed.
For example: When hydrogen gas reacts with oxygen gas in the presence of a spark or flame, a chemical reaction occurs that produces water as a product:
Therefore, a chemical reaction is the process of transforming one set of chemicals into another set of chemicals. Option c is the correct answer.
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Cohesion would be the process that changes one set of chemicals into another set of chemicals, as the reactants bond to bring the product, aka product(s).
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Answer:
33.21% is the right answer.
Explanation:
0.04720 L * 0.02240 mol / L = 1.0573*10-3
mol Fe+2 = 1.0573* 10-3 mol = 5.2864*10-3
mass of Fe= 5.2864 * 10-3 = 0.29522g
% of Fe in sample = 0.29522 g Fe / 0.8890 g of sample * 100 = 33.21%
Final answer:
The number of moles of MnO4– added to the solution is 0.00106 mol. The moles of Fe2+ in the sample is 0.00530 mol. The grams of iron in the sample is 0.296 g and the percentage of iron in the sample is 33.33%.
Explanation:
The titration reaction between Fe2+ and MnO4– in acid solution is as follows: 5Fe2+ + MnO4– + 8H+ → 5Fe3+ + Mn2+ + 4H2O. Firstly, we can calculate the number of moles of MnO4– added to the solution using the formula volume X molarity. That is 0.0472 L X 0.02240 M = 0.00106 mol MnO4–. According to the balanced redox reaction, one mole of MnO4– reacts with five moles of Fe2+. Therefore, the moles of Fe2+ in the sample is 0.00106 mol MnO4– X 5 = 0.00530 mol Fe2+.
Next, we calculate the grams of iron in the sample. The molarmass of iron is approximately 55.85 g/mol, thus the grams of iron in the sample are 0.00530 mol Fe2+ X 55.85 g/mol = 0.296 g Fe2+. Finally, we find the percentage of iron in the sample by mass = (mass of iron in the sample / total mass of the sample) X 100%. Therefore, the percentage is (0.296 g / 0.8890 g) X 100% = 33.33%.
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A) Synthesis
B) Decomposition
C) Double Replacement
D) Single Replacement
I choose C was wondering if I was correct
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Answer:
C: Double Replacement
Explanation:
do not decompose the old compounds
form new compounds
change the appearance of the old compounds