Answer:
The number 0.88400 has 3 significant figures.
Explanation:
The number 0.88400 has 3 significant figures because, zeros to the left of the first significant figure is not significant, and only for numbers greater that 1, the zeros to the right of the decimal point are significant.
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another?
1. The volume and the shape stay the same.
2. The volume increases to fill the new container, but the shape stays the same.
3. The volume stays the same, but the shape changes to fit the new container.
4. The volume and the shape change to fill the new container.
According to the kinetic-molecular theory, if a liquid is transferred from one container to another, the volume stays the same, but the shape changes to fit the new container.
What is the kinetic-molecular theory?The kinetic theory of gases is a simple, historically significant classical model of the thermodynamic behavior of gases, with which many principal concepts of thermodynamics were established.
The kinetic-molecular theory is based on some assumptions which includes:
Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.These particles move in a straight line until they collide with another particle or the walls of the container.These particles are much smaller than the distance between particles. Most of the volume of a gas is therefore empty space.Learn mote about the kinetic-molecular theory at: https://brainly.com/question/134712
#SPJ1
The solubility of Zn3(PO4)2 is 3.4 x 10^-8 mol/L, what is its Ksp? a) 49b) 4.9 x 10^36c) 4.9d) 0.49e) 4.9 x 10^-36
Answer
The dissociation of
Zn₃(PO₄)2
Write down at least ten changes that you observe in the world around you. W
changes involve chemistry? Explain your reasoning.
Burning, frying, rusting, and rotting are a few instances of chemical transformations. The physical transformations of boiling, melting, freezing, and shredding are a few examples. If enough energy is provided, many physical changes can be reversed. A different chemical reaction is the only way to undo a chemical change.
What are chemical changes?Changes in temperature, odor, color, precipitate or gas formation, and precipitate or gas formation.Burning, frying, rusting, and rotting are a few instances of chemical transformations. The physical transformations of boiling, melting, freezing, and shredding are a few examples. If enough energy is provided, many physical changes can be reversed. A different chemical reaction is the only way to undo a chemical change.Chemical transformations occur when two or more components are mixed to create a brand-new compound. You have a new material after a chemical transformation. A chemical change might occur when burning paper or when baking a cake. The three oxygen atoms that make up ozone form an inert gas.To learn more about : Chemical change
Ref : https://brainly.com/question/1222323
#SPJ9
What word describes an investigation by the same students which gives similar results each time
Answer:
paiwnwom0sjsnenwksksjnssisn
Explanation:
d ko alam
what element is this
Answer:
looking at it,it should be oxygen or Nitrogen.
In a vacuum, all light waves ______.
have the same wavelength.
have the same energy.
have the same speed.
have the same frequency.
In a vacuum, all different types of light waves have the same speed (Option 3).
What are light waves?Light is energy emitted as waves that travel to a given frequency and speed. These light waves emit electricity and magnetism and have the same speed when they are found in space (vacuum).
Light waves can take many different forms which include:
radio wavesmicrowavesinfraredvisible lightUV lightTherefore, with this data, we can see that light waves travel to a given velocity which is the same in equal conditions as occurs in space where conditions are equal.
Learn more about light waves here:
https://brainly.com/question/15033563
#SPJ1
You are writing a safety contract for your class. List 10 things you would include in the contract.
Writing a safety contract for your class. List 10 things you would include in the contract are
1) students should always listen to teachers.
2) In case you see fire in school you should tell to your teacher.
3) No eating in between class.
4) No student may work in laboratory without teachers.
5) wear eyeglasses when need in class.
6) Proceed with cautions in lab.
7) Student should always wear a proper safety material.
8) Tie your hair in tight ponytail or make braid.
9) Work with chemicals by takin precaution do not play with it.
10) Carry sharp instrument with tip down away.
To learn more about safety contract here
https://brainly.com/question/3049539
#SPJ1
Part 1: Looking at the diagram above, what can you tell me about the type of reaction it is? Is this exothermic or endothermic? How do you know? Make sure you support your answer by using the diagram.
Exothermic reaction
ExplanationsThe given diagram is the diagram showing the change in the heat of the reaction of a substance.
If the enthalpy change is negative, the reaction is exothermic showing that the heat is given out to the surroundings but the enthalpy change is positive, the reaction is exothermic showing that the heat is absorbed from the surrounding.
From the diagram, the energy of the product is C while the energy of the reactant is A.. Since the energy of the product is lower than that of the reactant, hence the change of enthalpy will be expressed as:
[tex]\triangle H=C-A<0:\text{ }\triangle H=-ve[/tex]Since the enthalpy change is negative, the reaction is exothermic showing that the heat is given out to the surroundings.
what is Keq for the reaction N2+3H2 = 2NH3 if the equilibrium concentrations are NH3 = 3 M, N2 = 1 M, H2 = 2 M
The ammonia formation has been 1.125 mol/L.
Keq is defined as the ratio of the mathematical product of the equilibrium concentrations of the species on the right that is multiplied by the concentrations of the chemical products divided by the mathematical product of the equilibrium concentrations of the species on the left.
This is the reaction that makes ammonia from hydrogen and nitrogen. Only one product is produced in this reaction. This reaction is therefore known as a binding reaction. A small Keq Keq < 1 implies a large concentration of reactants at equilibrium. In this case, the reaction drives the formation of reactants. If Keq ≈ 1 it means that there is a significant amount of reactants and products in equilibrium.
Learn more about The equilibrium concentrations here:-https://brainly.com/question/13414142
#SPJ1
Keq is equal to the number 4.5
Balance this redox reaction. Assume a basic solution. Show your work.
Cl- + MnO4- --> MnO2 + ClO3-
The balanced chemical equation is
[tex]\rm Cl^- + 2MnO^4^ \rightarrow 2MnO_2 + ClO^3^-[/tex]
What is chemical equation?Chemical equation is defined as a chemical reaction's symbolic representation in the form of symbols and chemical formulas.
It can also be defined as a chemical reaction mathematical expression that represents the product formation from the reactants.
Balanced chemical equation is defined as an equation with the same number of atoms of each type in the reaction on both the reactant and product sides.
It can also be defined as stoichiometric coefficients are added to the reactants and products.
Thus, the balanced chemical equation is
[tex]\rm Cl^- + 2MnO^4^ \rightarrow 2MnO_2 + ClO^3^-[/tex]
To learn more about chemical equation, refer to the link below:
https://brainly.com/question/28294176
#SPJ1
Calculate the density of a rectangular solid with a mass of 95.5 g, length of 3.55 cm,
height of 250 mm, and width of 0.0175 m.
The density formula is the mass of an object divided by its volume. That is d = m/v.
Density = mass/ volume = 95.5/ 155.312 = 0.615 [tex]g/cm^{3}[/tex].
How do u calculate density?The density formula is the mass of an object divided by its volume. That is d = m/v in equation form, where d is the density, m is the mass, and v is the volume of the object. The standard units are kilograms per cubic meter.The number of units per volume, area, or length: as. a: a substance's mass per unit volume b: the distribution of a quantity (such as mass, electricity, or energy) per unit of space, typically.Density is an important concept because it tells us which substances will float and which will sink when placed in a liquid. Substances float in general if their density is less than the density of the liquid in which they are placed.a rectangular solid with a mass m = 95.5 g,
length = 3.55 cm
height = 250 mm = 25 cm
and width = 0.0175 m. = 1.75 cm
volume of the rectangular solid = 3.55 * 25 * 1.75 =155.312 [tex]cm ^{3}[/tex]
density = mass/ volume = 95.5/ 155.312 = 0.615 [tex]g/cm^{3}[/tex].
To learn more about : Density
Ref : https://brainly.com/question/1354972
#SPJ9
Units of concentration are grams per 100 mL. What is the concentration of a solution containing Potassium Nitrate (20g in beaker) and 100 mL of water?
Answer: The concentration of solution is, 62.5 g/100 mL
Explanation:
Mass of solute = 25 g
Volume of solvent (water) = 40 mL
Now we have to calculate the concentration of solution.
Now put all the given values in this expression, we get:
Thus, the concentration of solution is, 62.5 g/100 mL
Mr. Smith is flying from China to Germany. It takes 7 hours to make the 8744 m trip. What is his velocity? Give your answer in km/h.
heelp
The velocity of Mr. Smith is 1.249km/h or 1.25km/h
Here we are asked to calculate the velocity of Mr. Smith. To calculate, we will use the formula of velocity.
Velocity(V)= Displacement(S) / time(T)
Time= 7 hours
Displacement= 8744 m
As you want the answer in km/h, we need to change the distance in meters to kilometers
1000m=1km
Therefore 8744m/1000= 8.744km
Now putting these in the formula above, we get
V=8.744/7
V=1.249 km/h or 1.25km/h
learn more about velocity at
https://brainly.com/question/17609639
#SPJ12
Question 1What is the mass of 11.52mol of particles ofCalcium Chloride (CaCl₂)? (Round any atomicmass from the periodic table to one decimal
Explanation:
First let's find the molar mass of CaCl2:
Ca = 40.1 g/mol
Cl = 35.5 g/mol
40.1 + (35.5*2) = 111.1 g/mol
So:
111.1 g ---- 1 mol
x g ---- 11.52 mol
x = 1,279.872 g
Answer: 1,279.9 g
Each dime has a mass of 2.268 g. How much would the stack of 277778 dimes weigh
what is the mass in grams of 1.71 x 10^34 molecules of ketamine?
The mass of ketamine is 66.56 ×[tex]10^{11}[/tex] g.
Number of mole = Avogadro number / number of molecules
Avogadro number = 6.02 × [tex]10^{23}[/tex]
Number of molecules = 1.71 ×[tex]10^{34}[/tex]
Number of mole = 1.71 ×[tex]10^{34}[/tex] / 6.02 × [tex]10^{23}[/tex] = 0.28 ×[tex]10^{11}[/tex]
Number of mole = given mass / molar mass
Molar mass of ketamine = 237.72 g
Number of mole = 0.28 ×[tex]10^{11}[/tex]
Hence, given mass = Number of mole × molar mass
Given mass = 0.28 ×[tex]10^{11}[/tex] × 237.72 g
Given mass = 66.56 ×[tex]10^{11}[/tex] g
So, the mass of ketamine is 66.56 ×[tex]10^{11}[/tex] g.
Avogadro number is number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles.
Learn more about Avogadro number here:- https://brainly.com/question/14138110
#SPJ1
7. When solid carbon reacts with oxygen gas to produce carbon dioxide gas, woul the triangle H value be on the reactant or product side of the equation?
When solid carbon reacts with oxygen gas to produce carbon dioxide gas. the deltaH (enthalpy change ) value is negative .DeltaH would be on the product side of the equation.
What is enthalpy change?In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.
Knowing whether q is endothermic or exothermic allows one to characterise the relationship between q and H. An endothermic reaction is one that absorbs heat and demonstrates that heat from the environment is used in the reaction, hence q>0 (positive). For the aforementioned equation, under constant pressure and temperature, if q is positive, then H will also be positive. In a similar manner, heat is transferred to the environment when it is released during an exothermic reaction. Thus, q=0 (negative). Therefore, if q is negative, H will also be negative.
Learn more about enthalpy change here :
brainly.com/question/1445358
#SPJ13
What is the mass (in grams) of 1.45 mol BaBr2?
Please include how to get answer if possible.
According to the mole concept, the mass in grams of 1.45 mole of barium bromide is 430.853 g.
What is mole concept?Mole concept is a concept according to which mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Number of moles is calculated by the formula, :mass/molar mass
So for the given problem mass=number of moles×molar mass
=1.45×297.14=430.853 g
Hence, 430.853 g is the mass of 1.45 moles of barium bromide.
Learn more about mole concept,here:
https://brainly.com/question/22540912
#SPJ1
4. A gas occupies 8.7L at a temperature of 29.0°c. What is thevolume at 133°C? (Charles Law)
Step 1
Charles' law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure.
Mathematically:
V1/T1 = V2/T2 (1)
V = volume in L
T = temperature in K
----------------
Step 2
Data provided:
V1 = 8.7 L
T1 = 29.0 °C + 273 = 302 K
-----
V2 = unknown
T2 = 133 °C + 273 = 406 K
----------------
Step 3
V2 is cleared from (1):
V1/T1 x T2 = V2 = 8.7 L/302 K x 406 K = 11.7 L approx.
Answer: V2 = 11.7 L
193 ml of oxygen o2 was collected over water on a day when the atmospheric pressure was 762.0mmHg. The temperature of the water was 23.0C.
The mass of the oxygen that is collected is 0.25 g.
What mass of oxygen was collected?From the question, we have the following information;
pressure of the gas = 762.0mmHg
Vapor pressure of the gas = 21.1mmHg
temperature of the gas = 23.0C or 296 K
Volume of the gas = 193 ml or 0.193 L
We know that the pressure of the oxygen gas is now going to be the volume of the gas minus the vapor pressure at that temperature.
We now have;
762.0mmHg - 21.1mmHg = 740.9 mmHg or 0.97 atm
Now we have;
PV = nRT
n = PV/RT
n = 0.97 atm * 0.193 L/ 0.082 atmLK-1mol-1 * 296 K
n = 0.187/24.3
n = 0.0077 moles
Mass of the oxygen = 0.0077 moles * 32 g/mol = 0.25 g
Learn more about ideal gas equation:https://brainly.com/question/28837405
#SPJ1
Missing parts;
193 mL of O2 gas was collected over water on a day where the atmospheric pressure was 762mmHg. The temperature of the water was 23.0 C, and the vapor pressure of water at this temperature was 21.1mmHg. What is the mass in grams of the oxygen collected?
Scientific research in the 1800s revealed that the rate of
infection in surgery patients drastically decreased when
antiseptics were used to clean wounds before procedures.
Which statement best describes the impact of this scientific research?
OA. It had a negative impact on both society and the environment.
OB. It benefited society because it improved humans' understanding of
how infections spread.
OC. It harmed the environment because it led to new agricultural
practices.
OD. It had a positive impact on the environment because it prevented
bacterial growth.
Scientific research in the 1800s revealed that the rate of infection in surgery patients drastically decreased when antiseptics were used to clean wounds before procedures. It benefited society because it improved humans' understanding of
how infections spread.
In our day to day life, various different types and unknown diseases we are facing. This can be due to change in our activities or by using harmful chemicals in industries or may be due to experimental activities in laboratory.
If we use antiseptic before the procedures to clean wounds, it kill the bacteria and other virus and make it clean. This protect us from the upcoming harmful effects of uncleaned wounds.
So, it make us a step towards the healthy and wealthy life.
Thus, we concluded that using antiseptics to clean wounds before procedures. It benefited society because it improved humans' understanding of
how infections spread.
learn more about antiseptic:
https://brainly.com/question/13242539
#SPJ13
The activation energy for a reaction is the energy difference between what two components of a reaction?
ANSWER
Reactant and intermediate
EXPLANATION
Activation energy is the minimum energy required to activate a chemical reaction
Activated energy is the difference between the reactants and the intermediate
Therefore, the correct answer is option Dm
five ways through which plant diseases are spread
How many molecules are in 2.6 g of H2O
According to the solution is 8.671 x 10²³ molecules are in 2.6 g of H₂O.
What are molecules and examples?A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules. For example, the symbol for the oxygens and molecule are O and O2, etc.
Briefing:The two hydrogen atoms in one gram of water weigh 2 atomic units (au) while an oxygen atom weighs 16 au. Water therefore has a molar mass of 18 au. This indicates that 18 grams equal 1 mole of water.
1 mole = 18 grams
x moles = 2.6 grams
Therefore x = (2.6x1)/18 = 0.144 moles.
1 mole contains 6.022141 x 10²³ particles
We have 0.144 moles, so:
0.144 x 6.022141 x 10²³ = 8.671 x 10²³ molecules.
To know more about Molecules visit:
https://brainly.com/question/19595631
#SPJ13
12
32. How many grams of ice at 0°C can be melted by the condensation of 12.39 g of steam at 100°C,
assuming a complete transfer of thermal energy?
Number 32
Mass of ice that will produce by ice at 0°C which can be melted by the condensation of 12.39 g of steam at 100°C, will be 16.1 grams
How to find mass of ice?A body's mass is always constant. Mass can be calculated in one of two ways: mass = volume density. The gravitational force acting on a mass is measured by weight. "Kilogram" is the SI unit of mass.
We know, that
Q = mcΔT
Heat gained by the ice = Heat loss by the steam
Mass of ice = m
Specific heat of ice (c) = 2.093 kg/kg- k
T= 293k
Mass of steam = 12.399
0.0129
Specific heat of vapor = 1.996 kJ/kg k
T = 393k
Now,
m*2.093*273 = 0.01239*1.996*373
m = 0.01239*1.996*373/2.093*273
Mass of ice in grams = 0.0161*1000
Mass of ice = 16.1 grams
To learn more about mass, refer to:
https://brainly.com/question/19385703
#SPJ9
How many moles of sucroseare in 5.25x1029 sucrosemolecules?[?]x10[?]Enter your answer with the correctnumber of significant figures and be surethe prefix is a number between 1 and 10!Prefix (green)Exponent (yellow)Enter
To calculate the number of moles we will use Avogadro's number, which relates the number of molecules contained in a mole of any substance, the relationship between moles and molecules is as follows:
[tex]\begin{gathered} \text{Moles of a subtances=Molecules}\times\frac{1mol}{6.02\times10^{23}molecules} \\ \text{Moles of sucrose=}5.25\times10^{29}molecules\times\frac{1mol}{6.02\times10^{23}molecules} \\ \text{Moles of sucrose=}8.72\times10^5mol \end{gathered}[/tex]In the statement we are given the molecules with 3 significant figures, therefore the answer must also have 3 significant figures. So the answer will be: In 5.25x10^29molecules are 8.72x10^5 mol of sucrose
What is the name of the chemical formula Cl3N8?
A. chlorine nonanitrogen
B. trichlorine octanitride
C. chlorine nitride
D. tetrachlorine octanitride
The name of the chemical formula; Cl₃N₈ is trichlorine octanitride (option B).
What is IUPAC?IUPAC is the acronym for international Union of pure and applied chemistry. IUPAC nomenclature of organic chemistry is a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry.
According to this IUPAC nomenclatural rules, the following applies:
Mono means oneDi means twoTri means threeTetra means fourPenta means fiveHexa means sixHepta means sevenOcta means eightAccording to this question, a compound with the following chemical formula is given; Cl₃N₈. This suggests that the name will be trichlorine octanitride.
Learn more about IUPAC at: https://brainly.com/question/16631447
#SPJ1
What is the scientific method?
OA. A set of rules that all scientists need to follow
OB. A set of steps that help scientists gather knowledge
OC. A way for scientists to prove that their theories are correct
O D. A way for scientists to come up with questions about the world
Answer:
B: A set of steps that help scientists gather knowledge.
Explanation:
It's a series of steps that starts with an observation and ends with a Report/conclusion. The others don't make sense.
Please give brainliest!!
The volume of a block of wood is 16 cm3. What is the volume in cubic meters?
The volume in cubic meters is 4096m.
To calculate the volume or volume of an object or room in cubic feet measure the length, width, and height in feet and multiply length x width x height. The volume of an object is the amount of space it fills. Large capacity is measured in cubic meters m3. Smaller volumes are measured in cubic centimeters cm3 or cubic millimeters mm3.
Board foot is the most commonly used standard in lumber and lumber. One foot of board is equivalent to 144 cubic inches of lumber, or a board 1 inch thick, 12 inches wide, and 1 foot long. The second unit of measure is code. The volume of a box can be calculated as length x width x height. Taking a single-layer box as an example 102 x 102 x 102 is equivalent to 1,061,208 cubic millimeters. In metric units, volume is usually expressed in millimeters and liters.
Learn more about Cubic meters here:-https://brainly.com/question/10868015
#SPJ1
Calculate the pressure (in atm) of a 3.30 mol sample of ammonia gas at 350.0 K in a 3.00 L container using the van der Waals equation. For ammonia, a = 4.17 L2 atm/mol² and b = 0.03712 L/mol.
The pressure (in atm) of a 3.30 mol sample of ammonia gas at 350.0 K in a 3.00 L container using the van der Waals equation is 89.66 atm.
Given that :
n = 3.30 mol
Volume V = 3.00 L
Temperature T = 350.0 K
for ammonia :
a = 4.17 L²atm/mol²
b = 0.03712 L/ mol
Vander waals equation is given as :
( P + an²/V²) ( V - nb ) = nRT
(P + 4.17 × ( 3.30 )² / 3² = 3.30 × 0.082 × 350
P + 5.045 = 94.71
P = 89.66 atm
Thus, The pressure (in atm) of a 3.30 mol sample of ammonia gas at 350.0 K in a 3.00 L container using the van der Waals equation is 89.66 atm.
To learn more about Van der waals equation here
https://brainly.com/question/11722233
#SPJ1
