The formula is pH = -log[[tex]H^{+}[/tex]]. You are given the concentration of hydrogen ions so all you need to do is input that into the formula.
[tex]pH=-log[H^{+}]\\\\pH=-log[5.0x10^{-4}]\\\\pH=3.30[/tex]
1. Explain what happens to the train cars when the engine car begins moving to the left. In your response, describe the role played by magnetic force.
The train cars moves in the same direction when the engine car begins
moving to the left.
What is Law of magnetism?The law of magnetism states that like poles repel and unlike poles attract.
In substances which have magnetic field, they are known to attract each
other.
The engine and train car are highly magnetized which results in them
moving in the same direction when they are in close contact with one
another.
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Read the following paragraph from the section "Plasma.""
Answer:
I read, but what do I do now (what was the question)?
Answer: the question isn't listed
Explanation:
Fatty acids that contain no carbon-carbon double bonds are referred to as.
Answer:
saturated fatty acids
As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy?
A. Both the potential energy and kinetic energy decrease.
B. The potential energy decreases while the kinetic energy increases.
C. The kinetic energy decreases while the potential energy increases.
D. Both the potential energy and kinetic energy increase.
C.
Explanation:
As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy? The potential energy decreases while the kinetic energy increases.
true or false? digital electronic circuits distinguish between two values of interest (binary 0 and 1) by the voltage level of the signa
Answer:
true
Explanation:
Answer:
True
Because 1 represents a higher voltage while 0 represents a low voltage.
What is the empirical formula for a compound if a sample contains 1. 0 g of S and 1. 5 g of O? SO SO3 S2O2 S2O3.
The empirical formula of the given compound is [tex]\bold{SO_3}[/tex].
The correct option is B.
What is an empirical formula?
The empirical formula of a chemical compound is the simplest whole-number ratio of atoms contained in the substance.
Given,
1.0 g of S
1.5 g of O
To calculate the empirical formula, we will divide the masses of the elements by their atomic weight.
For sulfur
[tex]\bold{\dfrac{1.0}{32} =0.03125\; mol}[/tex]
For oxygen
[tex]\bold{\dfrac{1.5}{16} =0.09375\; mol}[/tex]
Now, divide the greater value of mole came by the smaller value
[tex]\bold{\dfrac{0.09375\; mol}{0.03125\;mol} = 3}[/tex]
Thus, the empirical formula for the given compound is 1 for S and 3 for O
[tex]\bold{SO_3}[/tex]
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A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes?
A. Molecules in both the metal and the surrounding air will start moving at lower speeds.
b. Molecules in both the metal and the surrounding air will start moving at higher speeds.
c. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
d. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer:
A
Explanation:
The molecules in both metal and surrounding air will start moving slower because of the sudden decrease in environment tmeperature. The thermal energy around the metal plate decreases, also decreasing the kinetic energy.
Water has a unique property. Like most liquids, it becomes denser as it cools, but at 4°c it reaches maximum density. Solid ice is less dense than liquid water, which is why ice floats. How would this property protect aquatic life in a lake?.
This unique property of water protects the aquatic life in a lake because this unique property prevents the lower layer of water to become solid.
How the unique property of water protects the aquatic life?If this property does not exists in water then in very low temperature all the water will turn to solid and all the aquatic animals present in the deep layer of water will die so we can conclude that this property of water protects the aquatic life in a lake due to prevent the water to change into solid.
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2NH3 + MgSO4 + 2H20 — Mg(OH)2 + (NH4)2SO4
Using the chemical equation above answer the following questions.
c. If I have 4.6 moles of MgSO, and 5.4 moles of NH, which one is the limiting
reactant? You must show your work for credit.
d. What is the greatest amount of Mg(OH) that can be made with 4.6 moles of
MgSO, and 5.4 moles of NH3? You must show your work for credit
e. How many moles of the excess reactant is left over after the reaction has
been completed? You must show your work for credit
Based in the equation of the reaction reaction:
NH3 is the limiting reactant.the greatest amount of Mg(OH)2 produced is 2.7 moles.1.9 moles of the excess reactant are left over. Which one of the reactants is the limiting reactant?The equation of the reaction is given below:
2NH3 + MgSO4 + 2H20 — Mg(OH)2 + (NH4)2SO4From the equation of the reaction 2 moles of NH3 reacts with 1 mole of MgSO4
5.4 moles of NH3 will react with 5.4/2 moles of MgSO4 = 2.7 moles of MgSO4.
Therefore, MgSO4 is in excess and NH3 is the limiting reactant.
What is the greatest amount of Mg(OH) that can be made with 4.6 moles of MgSO, and 5.4 moles of NH3?Since NH3 is the limiting reactant:
2 moles of NH3 will produce 1 moles of Mg(OH)2
5.4 moles of NH3 will produce 5.4÷2 moles of Mg(OH)2 = 2.7 moles of Mg(OH)2
Therefore, the greatest amount of Mg(OH)2 produced is 2.7 moles.
How many moles of the excess reactant is left over after the reaction has been completed?MgSO4 is the excess reactant.
2.7 moles of MgSO4 are needed but there are 4.6 moles present.
Moles left over = 4.6 - 2.7 = 1.9 moles
Therefore, 1.9 moles of the excess reactant are left over.
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Use naming rules to explain why the following statement is not correct.
"The name of the formula PbCl, is lead tetrachloride".
This problem is providing us with a statement we need to disprove according to the naming rules for naming inorganic compounds. Thus, the correct name must be lead (IV) chloride, basically because it has a metal and a nonmetal.
Inorganic nomenclatureIn chemistry, naming chemical species is crucial in order to properly identify each chemical compound among the raft of chemical compounds in nature. Thus, nomenclature rules for compounds such as PbCl₄ demand us to identify their oxidation numbers:
[tex]Pb^{4+}Cl^-_4[/tex]
As they account for the name. Thus, since lead is a metal and chlorine a nonmetal, we must use the roman numeral-based nomenclature (stock) as lead has two oxidation numbers and we must distinguish between them.
Thereby, the name must be lead (IV) chloride and that is why the provided name, lead tetrachloride, is wrong as the systematic nomenclature (based on prefixes) applies for molecular compounds (nonmetal+nonmetal) only.
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If you use 104 kiloliters of water per year, approximately how many liters of water do you use in a day?.
Developing Mastery
Which state of matter has the most kinetic energy?
Liquid
Gas
Solid
Question 1 of 1 The state of chemical equilibrium occurs when the concentrations of _____. all reactants and all products remain constant products is less than the concentration of reactants
which two practices are examples of how people use sciense
Answer: A: Explaining natural events using facts and data AND B:Developing theories using many lines of evidence
Explanation: trust me.
Which of the following are examples of plasmas? ice cubes stars a gas fire auroras a neon sign a flashlight.
Stars, a neon sign and a flashlight are examples of plasmas. Therefore, the correct option is options are option B, D, E.
What is plasma?When the atoms within a gas become ionised, plasma is created, which is a medium that conducts electricity with roughly equal amounts of particles that are positively and negatively charged. In contrast to the solid, liquid, or gaseous forms of matter, it can also be referred to because the fifth state of matter.
Typically, electrons with a single molecule of negative charge individually carry the charge in the negative direction. Atoms or molecules without those same electrons normally have the positive charge. Stars, a neon sign and a flashlight are examples of plasmas.
Therefore, stars, a neon sign and a flashlight are examples of plasmas. The correct option is options are option B, D, E.
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How many moles of water is produced if used 0.5 mol of NaOH and 0.5 mol of HCl
Answer:
attached
Explanation:
answer attached
PLEASE HELP I DONT HAVE MUCH TIME!!
Rubidium is a group 1 metal with symbol, Rb. It reacts with water in a similar way sodium. Write the chemical equation for this reaction, including state symbols.
Answer:
Rb + H2O -> RbOH + H2
Explanation:
DDR
What statement describes elements.A Pure substance that
Answer:
Elements are pure substances with only one type of atom.
Explanation:
Hope This Helps
Have A Great Day
How many moles of carbon dioxide are there in 52. 06 g of carbon dioxide?.
Which of the following is a valid mole ratio from the balanced equation below? *
Answer:
Option 3
Explanation:
Looking on both sides of the equation you can see that there are 2 moles of lithium chloride (LiCl) and 1 mole of chlorine (Cl2).
In this specific example, you are looking at the numbers in front of the compounds and seeing if they are appropriate, to see if they match what you see in the equation.
So for option 4, it says that there are 2 moles of bromine (Br2) for every 1 mole of chlorine (Cl2), but if you look at the equation there is only 1 mole of Br2 and 1 mole of Cl2, not 2 moles of Br2. (Don't get confused by the subscripts! Only look at the big coefficients in the front for this!)
The same logic applies to options 2 and 1. So only option 3 is feasible.
Find the number of moles of aluminum in a 3.90 x 1022 atoms sample.
Answer:
Explanation:
Hi there!
We have,
1 mole of Al = 6.23*[tex]10^{23}[/tex] atoms
Also given no. of atoms = 3.90 x [tex]10^{22}[/tex] atoms
Now,
6.23*[tex]10^{23}[/tex] atoms= 1 mole
1 atom = [tex]\frac{1 }{6.23*10^{23}}[/tex] moles
or, 3.90 x [tex]10^{22}[/tex] atoms = [tex]\frac{1 }{6.23*10^{23}}[/tex] *3.90 x [tex]10^{22}[/tex] moles
Therefore, 3.90 x [tex]10^{22}[/tex] atoms has 0.0626 mols of Al.
Hope it helps!
what is the molar mass of CaF2
Explanation:
78.07 g/mol is your answer
Answer:
78.07 g/mol
Explanation:
i hope this helps
Given what you now know about the action of cyanide on cellular respiration, explain why the patients died of lack of oxygen while their blood oxygen levels were normal?.
Given what we know, we can confirm that the patients will have died from a "lack of oxygen" even with normal blood oxygen levels due to the fact that cyanide blocks the function of oxygen in the body.
What does cyanide do?The main function of cyanide is that it blocks the oxygen from being used in the electron transport chain. This chain creates ATP, the energy needed for the body to complete any functions. Since the oxygen cannot be used despite it being present, the patients die of a lack of oxygen even with normal levels.
Therefore, we can confirm that the patients will have died from a "lack of oxygen" even with normal blood oxygen levels due to the fact that cyanide blocks the function of oxygen in the body.
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The composition of blood is: 55% plasma, 45% formed elements. 45% plasma, 55% formed elements 50% plasma, 50% formed elements none of the above
Answer:
55% plasma, 45% formed elements.
Explanation:
Hope this helps!
All the chemical reactions that occur in a cell are called.
what is the weight of oxygen in 50gwater
To compute the required mass of the element to form the given molecules, we'll use the general formula shown below:
{eq}\displaystyle m_1=\frac{M_1}{M_2}\times m_2 {/eq}, where,
{eq}M_1 {/eq} is the molecular weight of the element.
{eq}M_2 {/eq} is the molecular weight of the given molecule.
{eq}m_2 {/eq} is the mass of the given molecule.
Answer and Explanation:
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The given value is:
The value of the mass of the water molecule is {eq}m_2=\rm 50\ grams {/eq}.
The chemical reaction for the formation of water...
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Formula for Mass: Definition & Examples
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Chapter 28 / Lesson 42
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What is mass? Learn the mass definition and how to find the mass of an object using the mass formula. See common mass characteristics and properties.
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what is hard water and what is soft water?
Answer:
Hard water is water that has high mineral content.soft water is water that is free from dissolved salts of such metals as calcium, iron, or magnesiumWhat is the difference between alkalinity and basicity?.
What is the density of water in grams per milliliter.
Answer: about 1 gram per millimeter :) It can change based on temperature, however
Explanation:
Researched on the internet
Solution a has a ph of 6. Solution b has a ph of 8. What is true about these solutions?.
Answer:Solution A has 10 times more hydrogen ions than solution B.
