Solutions of lead(II) nitrate and potassium iodide were combined in a test tube.
Write a net ionic equation for the reaction between lead(II) nitrate and
potassium iodide.
Answers
Answer:
Explanation: When solutions of potassium iodide and lead nitrate are combined?
The lead nitrate solution contains particles (ions) of lead, and the potassium iodide solution contains particles of iodide. When the solutions mix, the lead particles and iodide particles combine and create two new compounds, a yellow solid called lead iodide and a white solid called potassium nitrate. Chemical Equation Balancer Pb(NO3)2 + KI = KNO3 + PbI2. Potassium iodide and lead(II) nitrate are combined and undergo a double replacement reaction. Potassium iodide reacts with lead(II) nitrate and produces lead(II) iodide and potassium nitrate. Potassium nitrate is water soluble. The reaction is an example of a metathesis reaction, which involves the exchange of ions between the Pb(NO3)2 and KI. The Pb+2 ends up going after the I- resulting in the formation of PbI2, and the K+ ends up combining with the NO3- forming KNO3. NO3- All nitrates are soluble. ... (Many acid phosphates are soluble.)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
Solutions of lead(II) nitrate and potassium iodide were combined in a test tube. This is a double displacement reaction. The complete ionic equation is:
Pb²⁺(aq) + 2 NO₃⁻(aq) + 2 K⁺(aq) + 2 I⁻(aq) ⇒ 2 K⁺(aq) + 2 NO₃⁻(aq) + PbI₂(s)
Spectator ions are those that appear both in the reactants and in the products. They do not participate in the reaction, so they do not appear in the net ionic equation. The net ionic equation is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
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Related Questions
Which of the following is a non-contact force?
A. Magnetic force
B. Frictional force
C.Force applied by a boatman on the oars
D.Force applied by a table on a book placed on it
again I hate science
Answers
A square box with F2 on the left F3 on the top F1 on the right and F4 on the bottom. If F1 is equal to F2 and F4 is greater than F3 which statement is correct? An unbalanced force will move the box up. An unbalanced force will move the box down. Several balanced forces will keep the box stationary. Several balanced forces will keep the box moving towards the right.
Answers
Answer:
B
Explanation:
Why are enzymes required for living things to function? Reactions take place too slowly at body temperature and must be speeded up. Reactions take place too quickly at body temperature and must be slowed down. Reactions in the body require enzymes to act as reactants. Reactions in the body produce enzymes as byproducts.
Answers
Answer:
Reactions take place too slowly at body temperature and must be speeded up.
Explanation:
Reactions take place too slowly at body temperature and must be speeded up.
An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. Enzymes are required for living things to function because they speed up chemical reactions. Enzymes are protein catalysts.
Reactions take place too slowly at body temperature and must be speeded up.
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how many atoms of oxygen are in a molecule of glucose?
Answers
Answer:
6 oxygen atoms
Explanation:
For example – glucose (C6H12O6), a common sugar molecule, is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
Though a needle is several times as dense as water, a small needle can be made to float on the surface of water if placed carefully.
a) What could be the reason?
b) Why does a water drop assume spherical shape?
Plastics played an important role in forest conservation. Substantiate the statement.
Answers
Which of the following are characteristics of ionic compounds? Check all that apply. have high melting and boiling points are hard can exist as solids, liquids, or gases at room temperature (25°C) are good conductors of electricity when dissolved in water
Answers
Answer:
A-Have high melting and boiling points
B- Are hard
D- Are good conductors of electricity when dissolved in water
Explanation:
The characteristics of ionic compounds are: have high melting and boiling points ,are hard , good conductors of electricity when dissolved in water.
Explanation:
Properties of ionic compounds
These are the compounds have ionic bond that is complete transfer of electrons from one atom to another.They have high melting pointsThey have higher boiling pointsIn molten state they conduct electricityThey are soluble in water and conducts electricity in their aqueous state.Hard and brittle solidsSo, from this, we can conclude that from the given characteristics the characteristics of ionic compounds are: have high melting and boiling points ,are hard , good conductors of electricity when dissolved in water.
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If you have 547.3 grams of Ni2O, how many molecules would be present?
Answers
Answer: 8.830418848725065
Explanation:
8.830418848725065
Convert 1.580 hectoliters to deciliters.
liters
Answers
Answer:
1580 decilliters
Explanation:
Answer:
Convert 1.580 hectoliters to deciliters.
1,580
liters
Explanation:
I took the test;)
promise I will mark u brainiest help me
Answers
The answer is C
Further explanationLewis structures have a central atom and a terminal atom
The central atom is an atom that is bound to 2 or more other atoms, while a terminal atom is bound to 1 other atom
In describing Lewis's structure the steps that can be taken are:
1. Count the number of valence electrons from atoms in a molecule
2. Give each bond with a pair of electrons
3. The remaining electrons are given to the terminal atom so that an octet is reached
4. The remaining electrons that still exist in the central atom
5. If the central atom is not yet octet, free electrons are drawn to the central atom to form double bonds
Nitrogen -N : valence electron : 5 , need 3 electron for stable⇒central atom
Chlorine-Cl : valence electron : 7, need 1 electron for stable⇒terminal atom
So that N will bind 3 Cl atoms to get stability (using electrons together with covalent bonds), so that there is 1 lone pair in N atoms and 3 lone pairs from each Cl atom (a total of 10 lone pairs of electrons)
In steel, what smaller atom fits into the empty spaces within the iron crystal lattice?
Answers
Answer:
The smaller atoms become trapped in the spaces between the atoms in the crystal matrix, called the interstices. This is referred to as an interstitial alloy. Steel is an example of an interstitial alloy, because the very small carbon atoms fit into interstices of the iron matrix.whats the difference between spring tides and neap tides
Answers
Answer:
Spring tides have higher high tides and lower low tides whereas neap tides have lower high tides and higher low tides.
Explanation:
Answer:
Spring tides have higher high tides and lower low tides whereas neap tides have lower high tides and higher low tides. Hence, the range (difference in water level between high and low tide) is much larger in a spring tide than in a low tide.
How many moles are in 170.3 grams of Carbon?
Please help show me how you do this❤️
Answers
Answer:
There are 14.2 moles of carbon in 170.3 grams of carbon
Explanation:
The mass of one mole of carbon is known as the molar mass of carbon. the unit of molar mass is grams/mole, g/mol.
The molar mass of carbon is 12 grams. This means that for every 12 grams of carbon, one has one mole of carbon.
To determine the number of moles of carbon present in 170.3 grams of carbon, the given mass of carbon, that is 170.3 grams is divided by 12.
The formula to use is: number of moles = mass of substance/molar mass of substance
Number of moles of carbon = 170.3 g / 12 g/mol = 14.2 moles
Therefore, there are 14.2 moles of carbon in 170.3 grams of carbon
Why do scientists study seismographs
Answers
Answer:
to study sub terranian earth movements
Explanation:
8H earth science
Answer:
B-to determine the location of an epicenter
Explanation:
Seismologists study earthquakes by going out and looking at the damage caused by the earthquakes and by using seismographs. A seismograph is an instrument that records the shaking of the earth's surface caused by seismic waves and determine the location of an epicenter
-Source: Geo.mtu.edu
Plz help on question 4
Answers
You know thy vegetable oils is going to be at the top because it is the lightest. So, there are really only two possible choices; a or b. B is incorrect because water and soap have the same volume, but soap has a larger mass meaning it would be beneath the water. Therefore, the correct answer is A.) corn syrup, dish soap, water, vegetable oil. Hope this helps!
Does temperature impact the ability of water to dissolve things? How do you know?
Answers
Answer:
The temperature of the water affects the amount of dissolving but it also affects the rate of diffusion.
Explanation:
Answer:
Yes, temperature can impact the ability of water to dissolve things, the solubility increases with temperature.
Explanation:
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.
If 10 ml of orange juice has a mass of 5 g, what would the density of Orange
Juice be? (Hint: Density=massivolume)? *
Answers
Answer:
Sep by step to determine the mass of 25 mL of orange juice
Explanation:
Measure mass of container , then add 25 mL of OJ and subtract the difference
Which elements form ions that are usually colored in solid compounds and in solution? A. alkali metals B. alkaline earth metals C. transition elements D. halogen elements
Answers
Answer:
C. transition elements
Explanation:
Transition elements are groups of metallic elements that have partially filled d orbitals. They occupy the d-block of the periodic table (Group 3-12). Examples of elements that fall under this category are Nickel (Ni), Cobalt (Co), Copper (Cu), Zinc (Zn) etc. Transition metals have outstanding properties that distinguishes them from other elements.
One of these properties is their ability to form colored compounds due to their unfilled d electron shells. They form ions that are usually colored in solid compounds and in solution.
The elements that have been colored in the solid and solution have been transition elements.Thus, option C is correct.
The periodic table has been consisted of metals, non-metals, and metalloids. The presence of valence electrons of the elements has been responsible for the chemical properties of the elements.
The transition elements have been the metals that have been consisted of electrons in the d orbitals. The presence of electrons results in the atom to excited to higher energy and have radiations in the visible region.
Thus, the aqueous and solid transition elements have been colored. Thus, option C is correct.
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Why do humans feel so attached in relationships? What is the reason?
Answers
Answer:
We attach when we are convinced that we are incapable of healing ourselves or giving ourselves what we really want and need.
Explanation:
Hope you get right
When there is just one atom of an element in a molecule, how
is this atom represented in a chemical formula?
Answers
Answer:
Molecular formula, C8H16O4; empirical formula, C2H4O
Explanation:
When there is just one atom of an element in a molecule, no subscript is used in the chemical formula.
most inferences about the characteristics of Earth's mantle and core are based on
Answers
Answer:
Properties of seismic waves
Explanation:
Most of the inferences about the characteristics of earth's mantle and core are based on the properties of seismic waves.
Also, some other electromagnetic waves have been used to map the properties of the earth's interior. Seismic waves especially body waves behaves differently in certain medium. P -waves are able to pass through any material medium. S -waves can only pass through solid. They are cut off in fluid medium.Which describes a cell after diffusion?
A. The concentration inside the cell is greater than outside
B. The concentration is the same inside and outside the cell
C. The concentration outside the cell is greater than inside
Answers
The concentration inside the cell is greater than outside describes a cell after diffusion. Therefore, the correct option is option A among all the given options.
What is diffusion?Diffusion is regarded a passive mode of cellular transport in biology since it does not require additional energy to occur. It is the primary mode of transport for vital chemicals (such as amino acids) between cells. It is necessary for the production of energy via respiration and photosynthesis.
Some chemicals, referred to as "simple diffusion," are not controlled by the cell's own proteins. membrane. It is found in substances with low molecular weight, such as water, gasses and fat-soluble compounds. The concentration inside the cell is greater than outside describes a cell after diffusion.
Therefore, the correct option is option A.
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In 5.49 seconds, 1.80 g of argon-35 decay to leave only 0.225 g. What is the half-life of argon-35?
Answers
Answer:
Half life = 1.83 sec
Explanation:
Given data:
Total amount of Ar-35 = 1.80 g
Amount left after 5.49 sec = 0.225 g
Half life of Ar-35 = ?
Solution:
At time zero = 1.80 g
At first half life = 1.80 g/2 = 0.9 g
At 2nd half life = 0.9 g/2 = 0.45 g
At 3rd half life = 0.45 g/2 = 0.225 g
Half life:
Half life = Time elapsed / number of half lives
Half life = 5.49 sec / 3
Half life = 1.83 sec
Lucia is playing with magnetic toy vehicles. She has two identical toy vehicles (purple and pink) that start on opposite sides of a center magnet that cannot move. She moves both vehicles one space closer to the center magnet.
How did the potential energy of the two vehicles change? Did the potential energy of one vehicle change more than the other? Why do you think so?
Answers
Answer:
The potential energy of the two vehicles increased because they were moved against the magnatic forces. The potential energy of the pink car increased more then the potential energy of the purple car because the pink car was closer to the center magnet.
Explanation: I had this same exact question on a quiz and this was my response and I got a 100%
The effects of the movement of the cars closer to the center of the magnet are ;
A) The potential energy of the Two vehicles will be increased
B) The potential energy of one car ( pink car) will change more than purple car due to the distance between the pink car and the center magnet.
Potential energy is the energy contained in a body at rest, The increase in potential energy occur when an object continues to be at rest ( i.e. opposes movement ).
When the cars are moved closer to the center magnet the cars will oppose the motion because their movement is against the magnetic forces that exist between the center magnet and the cars ( i.e. like pole repel while unlike poles attract ). so as Lucia moves the cars closer their potential energies will continually increase ( i.e. the closer the car the higher its potential energy ).
Therefore the pink car been closer to the center magnet will experience a higher change in its potential energy than the purple car.
Hence we can conclude that The effects of the movement of the cars closer to the center of the magnet are ; The potential energy of the Two vehicles will be increased, The potential energy of one car ( pink car) will change more than purple car due to the distance between the pink car and the center magnet.
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10. Which statement about cellular respiration in plants and animals is true?
Ⓐ Both plants and animals need light to start cellular respiration.
Ⓑ Both plants and animals release energy from glucose/sugar in cellular respiration.
Ⓒ Both plants and animals take in carbon dioxide in cellular respiration.
Ⓓ Both plants and animals need water in cellular respiration.
Answers
Answer:
Ⓑ Both plants and animals release energy from glucose/sugar in cellular respiration.
Both plants and animals release energy from glucose/sugar in cellular respiration is a statement about cellular respiration in plants and animals is true. Option B is correct.
What is cellular respiration?Name given cellular respiration is a process in which cells convert oxygen into carbon dioxide for respiration which is important for survival.
In cellular respiration, the metabolism of breaking down complex oxygen into energy like ATP or sugar, or glucose can occur and releases some amount of energy too.
Therefore, Option B is correct. Both plants and animals release energy from glucose/sugar in cellular respiration is a statement about cellular respiration in plants and animals is true.
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Al(s) + HCl(aq)→AlCl3(aq) + H2(g) Identify the reactants for this reaction
Answers
Answer:
Al and Hcl
Explanation:
Reactants are the elements, compounds etc before the arrow
Pls help i will give crown
Answers
Answer: decay
Explanation:
promise I will mark u brainiest help me
Answers
Answer:
B. 16, 18, 18
Explanation:
Particle;
³⁴₁₆S²⁻
The number of particles we seek is the protons, neutrons and electrons.
³⁴₁₆S²⁻ is an ion that has gained two electrons from its stable state.
34 is the mass number = number of protons + neutrons
16 is the atomic number = number of protons
Number of protons = 16;
Number of neutrons = mass number - atomic number
= 34 - 16
= 18
Number of electrons; In a neutral atom, the number of protons and electrons are the same.
This atom has gained two more electrons
16 + 2 = 18
Answer;
16, 18 , 18
The ovaries in human females and the testes in human males are glands that produce hormones as part of the endocrine system. What function is the endocrine system primarily supporting through these glands and hormones?
A.
breathing
B.
obtaining food
C.
reproduction
D.
removing waste
Answers
Answer:
reproduction
Explanation:
its on study island
A common misconception people have is that sugar is energy and energy is sugar but you know better. Create a clear explanation that could be used to clear up this misconception.
Answers
A clear explanation of misconception of sugar is energy and energy is sugar is below.
What are sugars?Sugars are the disaccharide carbohydrate, it means they are formed by the combination of two monosaccharides.
One of the component of the sugar is glucose and we know that glucose is the source of energy in our body. So, sugars are naturally present in many food substance which in turn breaks down in the glucose and their composite constituent and releases energy. But we can never compare sugar as the main source of energy or equivalent to energy.
Hence, Energy means sugar is the misconception.
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A rock weighing 75.0g is placed in a graduated cylinder displacing the volume from 31.4 ml to 36.5ml. What is the density of the rock in grams /cubic centimeter.
Answers
Answer:
14.71 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
volume = final volume of water - initial volume of water
volume = 36.5 - 31.4 = 5.1 mL
But
1 mL = 1 cm³
5.1 mL = 5.1 cm³
From the question we have
[tex]density = \frac{75}{5.1} \\ = 14.705882..[/tex]
We have the final answer as
14.71 g/cm³Hope this helps you