Answers
Answer:
2molecules
Explanation:
NiCl2 + 2NaOH -> 2NaCl + Ni(OH)2
the mole ratio is 1:2
NiCl₂ + 2NaOH ⇒ 2NaCl + Ni ( OH )₂ when NiCl₂ react with NaOH. For each molecule of NiCl₂, 2 molecules of NaOH are needed.
What is molecule ?According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by the attractive forces known as chemical bonds.
Its original definition, "the smallest unit of a substance that yet preserves the qualities of that substance," was intended to be encompassed by this designation. "An atom is a body that cannot be cut in two; a molecule is the smallest conceivable component of a specific substance," wrote James Maxwell in 1873 when defining atom and molecule.
Elements usually consist of a single type of atom, whereas molecules might contain either a single type of atom or a number of different types of atoms.
Thus, 2 molecules of NaOH are needed.
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Related Questions
Which group of elements will form molecular compounds? (Choose all that apply)
Answers
Answer:
hope you understand and your answer is correct
Explain what matter is, and all of the states it can have.
Answers
Answer:
matter is anything that occupies space
states of matter : solid,liquid, gas,plasma
Answer:
matter can be anything, tables chairs, literally anything. it has volume and takes up space.
Explanation:
Solids, liquids, gases, plasmas, and Bose-Einstein condensates (BEC)
need help asap!!
u don’t gotta answer all questions btw
Answers
To calculate the molarity of the solution, we need to know the number of moles of BaI2 and the volume of the solution in liters.
First, let's calculate the number of moles of BaI2. We can use the formula:
Number of moles = Mass (in grams) / Molar mass
The molar mass of BaI2 can be calculated as follows:
Ba: atomic mass = 137.33 g/mol
I: atomic mass = 126.90 g/mol
2 x I = 2 x 126.90 g/mol = 253.80 g/mol
Total molar mass of BaI2 = 137.33 g/mol + 253.80 g/mol = 391.13 g/mol
Number of moles of BaI2 = 413 g / 391.13 g/mol ≈ 1.056 moles
Next, we need to convert the volume of the solution from milliliters to liters:
Volume of solution = 750 ml / 1000 = 0.75 L
Finally, we can calculate the molarity using the formula:
Molarity = Number of moles / Volume of solution
Molarity = 1.056 moles / 0.75 L ≈ 1.408 M
Therefore, the molarity of the BaI2 solution is approximately 1.408 M.
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Where did you observe thermal energy in the circuit?
Answers
Thermal energy in a circuit comes from the electrical energy that is transformed into heat. It is observed in resistors, capacitances and inductances.
The electrical energy in a circuit is converted into heat by the thermal energy. It relies on the sort of circuit under evaluation, which in turn depends on the circuit's components. These elements include resistors, capacitances, and inductances—individually or in combination.
The sum of the squares of the current, resistance, and power dissipated. The impedance of the circuit must be computed for an LCR circuit. then utilizing the impedance, the circuit's current may be estimated.
P=V^2/R
Hence, the thermal energy in a circuit is observed in resistors, capacitances and inductances.
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Express the following numbers as standard form:
a) 1.52 x 10^-2
b) 7.78 x 10^-8
Answers
Answer:
0.0152
0.0000000778
Explanation:
You just need to more the decimal as many times as the exponent to the to the left if it is negativa and to the right if it is positive.
how do i write out the equation please include states and the balancing with the work
Answers
Answer
\(C_8H_7O_2COOH(aq)+NaOH(aq)\rightarrow NaC_8H_7O_2COO(aq)+H_2O(l)\)Explanation
ASA from the question implies Acetysalicylic Acid (C₈H₇O₂COOH)
Therefore, a balanced neutralization equation for the neutralization of ASA and NaOH is:
\(C_8H_7O_2COOH(aq)+NaOH(aq)\rightarrow NaC_8H_7O_2COO(aq)+H_2O(l)\)Science 5th grade very PLZ answer correctly TYSM WILL MARK AS BRAINLIST IF ANSWERED TODAY!
Answers
Answer:
A
Explanation:
Conducts electricity:
-Steel
-Gold
-Copper
-Aluminum
Does not conduct electricity:
-Plastic
-Glass
-Rubber
-Wood
Metallic bonding causes metals to conduct electricity. Some metals are more highly conductive than others.
Hope this helps :)
Answer:
The first table correctly classifies the materials.
Explanation:
In table 1, all the elements on the left side are transition metals, expect for steel. Steel is not an element, it's an alloy (Which is a combination of two or more elements).Transition metals are very good conductors of heat and electricity. The reason why transition metals make such good conductors is because their outer electrons can move freely in their atom.
The right side of table 1 correctly classifies the materials that do not conduct electricity. The reason why those materials are poor conductors is because they all have their electrons tightly bound to their atoms.
In table 2, it classifies copper has a poor conductor which is wrong. It also classifies wood as a good conductor which also wrong for the reasons I stated above.
Why don't the changes to the mass of the planet affect the orbital path of the
planet?
Answers
Answer:
because the force depends upon the product of both masses and the square of the distance between them, whereas the planet's acceleration depends on just the mass of the Sun and the square of the distance between the Sun and planet.
Assign the reactivity of the carboxylic acid derivatives shown from most reactive to least reactive.
Answers
Acyl chloride > Acid > Acid anhydride > amide
What is the reactivity of the carboxylic acid derivatives?Carboxylic acid derivatives are a family of organic compounds that are structurally related to carboxylic acids. This group of compounds includes acid chlorides, acid anhydrides, esters, and amides.
The reactivity of carboxylic acid derivatives depends on their functional groups and the nature of the substituents attached to the carbonyl carbon.
Acid chlorides are highly reactive and can be used as powerful acylating agents in organic synthesis.
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Given that a 15.00 g milk chocolate bar contains 9.500 g of sugar, calculate the percentage of sugar present
in 15.00 g of milk chocolate bar keeping in mind that the answer should have four significant figures (two
decimal places).
Answers
Answer:
63.33%
Explanation:
To find the percentage of sugar in the milk chocolate just divide 15 by 9.5. This will give you 0.63333 (recurring). To find the percentage, times it by 100, which will give you 63.33%.
Hope this helped :)
The percentage of sugar present in the milk would be 63.33 %.
What are significant figures?In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.
As given in the problem a 15.00 g milk chocolate bar contains 9.500 grams of sugar, and we have calculated the percentage of sugar present,
The percentage of sugar present in the milk = 9.500 ×100/15
= 63.33 %
Thus, the percentage of sugar present in the milk would be 63.33 %.
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Ammonium phosphate is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid with liquid ammonia. Calculate the moles of ammonia needed to produce of ammonium phosphate. Be sure your answer has a unit symbol, if necessary, and round it to significant digits.
Answers
Answer:
The balanced chemical equation:
3 NH₃ + H₃PO₄ → (NH₄)₃PO₄
From the equation we see:
3 moles of NH₃ gives 1 mole (NH₄)₃PO₄
0.085 mole NH₃ will gives ?? mole (NH₄)₃PO₄
By cross multiplication:
number of moles of (NH₄)₃PO₄ = 0.085 * 1/3 = 0.028 mole
Explanation:
Write the formulas for: Ca and CI, Na and CI, H and 0, Al and 0, and K and F.
Answers
Answer:
Below
Explanation:
Combination of Calcium(Ca) and Chlorine(Cl); Calcium chloride
\(Ca+Cl_2 -> CaCl_2\)
Combination of Sodium(Na) and Chlorine(Cl); Sodium chloride(salt)
\(Na+Cl_2 -> NaCl\)
Combination of Hydrogen(H) and Oxygen(O);(water)
\(H_2 +O_2-> H_2O\)
Combination of Potassium (K) and Fluorine(f) ; Potassium fluoride
\(K+F ->KF\)
871g of sodium chloride is how many moles
Answers
Answer:
14.9 mol
Explanation:
To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.
871 g × (1 mol / 58.44 g)
= 871/58.44 mol
≈ 14.9 mol
Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.
PLEASE HELPPP!!! Calculate the mass (in grams) of lithium hydroxide that would be needed to produce 8.03 mol of
lithium sulfate in the reaction below.
2 LIOH + H2S04 -> Li2SO4 + 2 H20
Answers
Answer:
385g LiOH
Explanation:
Assuming the equation is balanced...
(8.03 mol Li2SO4) x (2 LiOH/ 1 Li2SO4)
= 16.1 mol LiOH ;
16.1 mol LiOH x (24g LiOH/ 1 mole LiOH) = 385g LiOH
The number of moles of LiOH needed to produce 8.03 moles is 16.06 moles. One mole of LiOH weighs, 23 g/mol. Hence, 16.06 moles weighs, 369.3 g.
What is lithium sulphate ?Lithium sulphate is an ionic compound formed by the donation of electron from the lithium metal to the sulphate group. It is formed by the reaction of lithium hydroxide with sulphuric acid.
As per the given balanced chemical equation of the reaction, the 2 moles of lithium hydroxide LiOH gives one mole of lithium sulphate. Then, number of moles of LiOH needed to give 8.03 mol of the product is:
2 × 8.03 = 16.06 mol.
Molar mass of LiOH = 23 g/mol.
mass of 16.06 moles of LiOH = 23 ×16.06 = 369.3 g.
Therefore, the required mass LiOH is 369.3 g.
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1. What organ system is responsible for controlling all of the body
functions?
Answers
Answer:
The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones. It is responsible for our thoughts, feelings, memory storage and general perception of the world. The human heart is a responsible for pumping blood throughout our body
Which subshells (s, p, d, f, or g) can have electrons with the indicated magnetic quantum number (ml)?
Answers
Answer:
=3 means is 3 or greater so that would be f and g subshells
=0 means is 0 or greater so that would be s, p, d, f and g subshells
=1 means is 1 or greater so that would be p, d, f, and g subshells
=4 means is 4 or greater so that would be g only
Calculate the molar mass of Ba(C2H3O2)2
Answers
Answer:
1. Barium Acetate.
2. Formula: Ba(C2H3O2)2.
3. Molar Mass: 255.415.
Explanation:
Reflect on the learning activities titled “Hypothesis”, “Variables and Hypothesis” and “Constructing a Hypothesis”. Describe some similarities and differences between a question that comes in response to an observation, and a scientific research question? Cite quotes from the readings to support your answer. Where do variables fit into this thinking? In other words, if you imagine a number line with observation questions at one end and scientific research questions at the other, what role do variables play anywhere along this continuum?
Answers
The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.
The following quotes from the readings illustrate this distinction:"A scientific question is one that can be answered by using scientific investigation. In contrast, an observation question is one that comes in response to observing or experiencing something in the natural world" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."An important feature of a scientific question is that it should be answerable within a reasonable amount of time and with the resources available" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."Research questions can be narrow or broad, depending on the scope of the research" (Constructing a Hypothesis).The concept of variables is crucial to both observation and scientific research questions, but they play different roles depending on where they fall on the continuum. Observation questions are usually less precise and may not require much consideration of variables. On the other hand, scientific research questions are likely to include a rigorous examination of variables and their potential effects."Variables are an essential part of a scientific experiment. They are the things that change in an experiment" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."Variables are important because they can affect the outcome of the research" (Constructing a Hypothesis).In summary, observation questions and scientific research questions share some similarities, but the latter is more specific, has a defined methodology, and may require more consideration of variables.For such more question on Hypothesis
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A term for using radioactive decay to determine the age of once-living fossils is-------
Answers
Answer:
I believe the answer is carbon dating
Explanation:
The particles in a gas have more space between them because
Answers
Answer:
They are more spread out.
Explanation:
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.
Answer:
Explanation:
Explanation:
Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other. In most cases, there are essentially no attractive forces between particles
Write the chemical symbols for three different atoms or atomic anions with 23 electrons.
Answers
Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.
The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.
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What are the two main properties of matter?
physical and chemical
physical and mechanical
chemical and electrical
mechanical and electrical
Answers
Answer:
physical and chemical.
item 6 excessive intake of some vitamins can cause toxicity-related side effects. match the vitamin with the potential side effect when that vitamin is taken in excessive quantities.
Answers
Vomiting, headaches, wooziness, blurred vision, and even liver injury are side effects of vitamin A. Vitamin D - Tiredness, headache, sickness, and vomiting. Vitamin C: Heartburn, diarrhea, vomiting, and nausea.
What negative consequences can too much vitamin A cause?Yes, excessive amounts of some types of vitamin A can be dangerous. A strong headache, blurred vision, nausea, dizziness, muscular aches, and issues with coordination can result from taking too much preformed vitamin A, which is typically found in supplements or some medications.
Which vitamins can be harmful if consumed in large quantities?Poisonous Substance. Any component in a multivitamin supplement can be toxic in large doses, but iron or calcium pose the biggest threat. Large or toxic doses of calcium, vitamin D, and vitamin A carry additional dangers.
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For most solid solutes, what happens to the solubility as temperature increases?
Answers
Answer:
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
equation for sodium chloride and sodium oxide
Answers
Convert 4.5 km to feet. (note: 2.54 cm = 1 in; 12 in = 1 ft)
O 1.4 x 10-2 ft
O 1.8 x 10-3 ft
O 1,400 ft
O 1.5 x 104 ft
O 1.8 x 103 ft
Answers
Answer:
14763.8
Explanation:
Answer:
the first option
Explanation:
hope it helps!!!!!!
If you want to distinguish between alkanes and alkenes using chemical reactions, which test: the combustion or the bromine is the better one? Explain your answer. Question 2: what you can use to wash the cloth contaminated by oil?
Answers
1) We could use the bromine water test to tell the difference between the alkane and the alkene
2) We can use a detergent to wash a cloth that is contaminated by oil.
What is an alkane?The term alkane has to do with a hydrocarbon that is composed of only a straight chain compound there are no multiple bonds in the alkane molecule and this is the difference between the alkane and the alkene. The alkene is composed of double bonds. The alkene compounds are able to decolorize bromine water while the alkanes can not.
If you have a contaminated cloth, you can be able to wash it by the use of a detergent because it is able to lift off the grease or oil by the use of the hydrophobic tail of the detergent.
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You are taking a scuba diving training course. The instructor is discussing
your scuba tanks, and tells you they have a volume of about 11 L and hold
enough gas for a one-hour dive. The instructor also tells you that you take in
about 2 L of gas with each breath. Which is the best explanation for why 11 L
of gas lets you breathe for one hour?
A Because of the high pressure of the water, the amount of gas
needed for each breath decreases.
B It is very cold underwater. This decreases the pressure inside the
tank and allows exhaled gases to be stored and breathed in
again.
© The gas is under pressure in the tank. As pressure increases,
volume decreases. A small tank can therefore hold a large
amount of gas.
Underwater the gas becomes cold enough for it to become a
solid. The solid vaporizes a little at a time to allow you to breathe
for longer
Answers
Answer:
C
Explanation:
The deeper you go into water, the greater pressure there is on everything. This compresses the air inside and causes the volume to shrink.
Sometimes air is measured in bars. Let's assume the Earth's surface pressure is 1. Let's also say that your lungs have 5.5L and the tank has 11L. That's only 2 breathes, but under 200 bars of pressure deep in the ocean? That's 200 x 11, which equals 2200L. That's about 400 breathes.
In addition, if making liters out of thin air doesn't make any sense, there's an alternative where you divide your liters per breath by the bar pressure. So instead of 200 x 11, you can take your 5.5 from your lungs and divide it by 200. That small number, in this case, 0.0275, can serve as how much air you breath deep in the ocean.
What is the powerhouse of the cell?
Answers
Answer:
Mitochondria is the powerhouse of the cell, but don't let this distract you from the fact that Mr. Krabs sold SpongeBob's soul for 62 cents
Answer:
mitochondria
Explanation:
What is the molar mass
MgCrO4
Answers
The molar mass of MgCrO4 is approximately 140.30 g/mol.
To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.
The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).
The atomic masses of the elements can be found on the periodic table:
Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.
Chromium (Cr) has an atomic mass of around 51.99 g/mol.
Oxygen (O) has an atomic mass of about 16.00 g/mol.
Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:
Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)
Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)
Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol
Molar mass ≈ 140.30 g/mol
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