Answer:
Measure of uncertainty thousands place or .01 mL
Yes it would be proper.
Explanation:
measure of uncertainty is when you as the user have to guess, since the pipette has marks every 0.1 ml then you can guess that the liquid is in between the marks or maybe closer to one mark then the other.
What happens when matter changes its form?
Matter either loses or absorbs energy when it changes from one state to another. For example, when matter changes from a liquid to a solid, it loses energy. The opposite happens when matter changes from a solid to a liquid. For a solid to change to a liquid, matter must absorb energy from its surroundings
In a neutral atom, the number of protons is always equal to what other part of the atom?
a.The sum of electrons and neutrons
b.The number of electrons
c.The number of neutrons
d.The number of neutrons
Answer:
b. The number of electrons
Explanation:
A "neutral atom" has a neutral charge. This means that its charge is equal to zero. In order for the charges to cancel out each other, the atom's positive charge should be equal to the negative charge. These being said, the number of electrons (negatively-charged) is then equal to the number of protons (positively-charged). Those atoms which are not neutral are called "ions." This means that they either have more or less electrons than the protons.
Sugar solution and steel are both mixtures. Which statement correctly compares them?
A) Both sugar solution and steel are separable mixtures.
B) Both sugar solution and steel are inseparable mixtures.
C) Sugar solution is a separable mixture but steel is an inseparable mixture.
D) Sugar solution is an inseparable mixture but steel is a separable mixture.
Answer:
C) Sugar solution is a separable mixture but steel is an inseparable mixture.
Explanation:
Sugar can be put in water then have the water dried out and there will be sugar. Metal how ever can not be a separable mixture without making it into a liquid.
There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the correct option is option C.
What is solution?Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules.
Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution. Sugar solution is a separable mixture but steel is an inseparable mixture. Sugar can be separated by heating the solution . Water will evaporate and sugar will be left. Steel can not be separated by any means.
Therefore, the correct option is option C that is Sugar solution is a separable mixture but steel is an inseparable mixture.
To know more about solution, here:
https://brainly.com/question/13812915
#SPJ2
5Fe2 2Mn2 8H2O2MnO4- 5Fe 16H In the above reaction, the oxidation state of iron changes from to . How many electrons are transferred in the reaction?
Answer:
The oxidation number of iron changes from 2+ to 0.
10 electrons are transferred in the reaction.
Explanation:
Step 1: Write the balanced redox reaction
5 Fe²⁺ + 2 Mn²⁺ + 8 H₂O ⇒ 2 MnO₄⁻ + 5 Fe + 16 H⁺
Step 2: identify both half-reactions
Reduction: 5 Fe²⁺ + 10 e⁻ ⇒ 5 Fe
Oxidation: 2 Mn²⁺ + 8 H₂O ⇒ 2 MnO₄⁻ + 16 H⁺ + 10 e⁻
Step 3: Identify the oxidation state change of iron
Iron changes from Fe²⁺ to Fe, that is, the oxidation number changes from 2+ to 0.
Step 4: Determine how many electrons are transferred in the reaction?
According to both balanced half-reactions, 10 electrons are transferred in the reaction.
help please! worth 100 points!
Answer:
THIS IS ONLY WORTH 50 POINTS LIAR LOL
Explanation:
BUT ILL DO IT ANYWAY GIVE ME A SEC
Answer:
Read below
Explanation:
Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a negatively charged ion.) Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules.
2 which amoung
the following measurements
the highest number of significant
containsFiqures
a) 1.23x10^-3 kg b) 1.2x10^-3 kg c)0.123×10^3kg
d) 2x 10^5 kg
How many atoms does h20 have and how many elements does h20 have?
Answer:
h20 has 3 atoms
Explanation:
2 hydrogen atoms and 1 oxygen atom
Construct the inequality for the following cases.
Bina ketaksamaan bagi kes-kes berikut.
1.
The sum of x and y are less than 50.
Answer:
x + y < 50
Explanation:
If an atom has 3 lone pairs of electrons, how many total electrons are
there?
Answer:
15
Explanation:
im right
A student is asked to build a model of an atom with 6 protons and 6 electrons. The student is then asked to make an identical model of the same atom but make it an ion. To be successful in this project, the student will:
A.Put six protons in the center of the model, and six electrons around the outside, then add one electron or take away one electron to make an ion.
b.Place electrons and protons in the center of the atom and create an ion by adding one more proton and one more electron to the center of the atom.
c.Put the electrons in the middle of the model and distribute the electrons around the protons. The ion will have seven protons.
d.Put six protons in the center of the atom and distribute the electrons around the protons. The ion will look the same but have seven or five electrons.
Answer:
A. Put six protons in the center of the model, and six electrons around the outside, then add one electron or take away one electron to make an ion.
Explanation:
To make an ion from a given atom, either one electron is added to it or taken away from it.
Protons are the positively charged particles in an atomNeutrons do not carry any chargesElectrons are the negatively charged particlesIn an atomic space, protons and neutrons occupy the center of the atom called nucleus.
Electrons moves round the extranuclear space.
Put the six protons in the center of the model The put the six electrons in the outer space. Then add or take away one or more electrons.This gives an ion.
In a Lewis structure, what do you do with the total number of valence if your ion is
2- charged?
a) Divide the valence number by 2
b) Multiply the valence number by 2
c) Subtract 2 from the valence number
d) Add 2 to the valence number
Answer: add 2 valence electrons
Explanation:
You have to make up for the negative electrons so you add them
When the ion is -2 charged we add 2 electrons to the total number of valence electrons.
Explanation:
Lewis structure is a simplified representation of the bonding of atoms in a molecule.It also represents the number of valence electrons and their distribution in the molecule.This electronic configuration should be of order by which all the octets of atoms in a molecule are complete.In order to draw a lewis structure of a molecule or ion count the valence electrons of all atoms in the ion or molecule.Draw skeletal structure of molecule or ion.Now add valence electrons to the structure with the help of dotsFor ions, if the charge on the ion is negative then add the number of electrons equal to the magnitude of negative charge to the total valence electrons.For ions, if the charge on the ion is positive then subtract the number of electrons equal to the magnitude of positive charge from the total valence electrons.So from this, we can conclude that when the ion is -2 charged we add 2 electrons to the total number of valence electrons.
Learn more about lewis structure here:
brainly.com/question/4144781?referrer=searchResults
brainly.com/question/1968297?referrer=searchResults
What should you do if your hypothesis is incorrect ?
Answer:
come to a conclusion
Explanation:
If 8.50 L of natural gas, which is essentially methane (CH4), undergoes complete combustion at 730 mm Hg and 20 degrees C, how many grams of each product are formed?
Grams of CO2=______
Grams of H2O=______
mass CO₂ : 14.96 g
mass H₂O : 12.24 g
Further explanationReaction
CH₄+2O₂⇒CO₂+2H₂O
mol CH₄V=8.5 L
P=730 mmHg=0,961 atm
T=20+273=293 K
[tex]\tt n=\dfrac{PV}{RT}=\dfrac{0.961\times 8.5}{0.082\times 293}=0.34[/tex]
mass CO₂(MW=44 g/mol)mol CO₂= mol CH₄ = 0.34
[tex]\tt 0.34\times 44=14.96~g[/tex]
mass H₂O (MW=18 g/mol)mol H₂O= 2 x mol CH₄ = 2 x 0.34 = 0.68
[tex]\tt 0.68\times 18=12.24~g[/tex]
help plz now asap this is timed
The circles, or orbits, for electrons are called energy levels. Each level can hold only a certain number of electrons. Add electrons to each level until you can add any more. How many electrons can each level hold?
IF YOU GIVE ME THE RIGHT ANSWER I WILL GIVE YOU BRAINIEST OR WHATEVER ITS CALLED!!!!!!!
Btw this subject is Science but I couldn’t find it so I just put chemistry.
Answer: n = 1 can hold a maximum of 2 electrons
n = 2 , maximum 8 electrons
n = 3, maximum 18 electrons
As per the principles of quantum mechanics, the number of electrons that can be added to a given energy level is deduced based on the three quantum numbers: n, l , m(l) and m(s)
'n' is the principal quantum number which defines the energy level. It can take on integer values: 0,1,2,3...
'l' is the angular momentum quantum number which defines the shape of the orbital that an electron occupies
l = 0,1,2...(n-1)
where: l = 0 corresponds to s-orbital
l = 1 corresponds to p-orbital
l = 2, corresponds to d-orbital
'm(l)' is the magnetic moment quantum number which defines the orientation of an orbital in space.
m(l) = -l, 0, +l
'm(s)' is the spin quantum number which defines the orientation of an electron is an orbital m(s) = +1/2 or -1/2
An s, p or d-orbital can accommodate a maximum of 2, 6 and 10 electrons respectively For energy level with n= 1
l = 0, i.e. s-orbital or 1s.
Therefore, the maximum number of electrons for a 1s orbital would be 2 resulting in an electron configuration of 1s²
For energy level with n= 2
l = 0, 1 i.e. s and p-orbitals
The maximum number of electrons would be
Electron configuration: 2s²2p⁶
For energy level with n= 3
l = 0, 1, 2 i.e. s, p and d-orbitals
The maximum number of electrons would be
Electron configuration: 3s²3p⁶3d¹⁰
I would like some help with this asap
Answer:
sorry i coudnt help
Explanation:
Identify the change in state that does not have an increase in entropy. a. Water evaporating b. Dry ice subliming c. Water boiling d. Ice melting e. Water freezing
Answer:
E. Water Freezing
Explanation:
Entropy refers to the degree of disorderliness of a system.
A. Water Evaporating: There is an increase in entropy, this is because the phase change is from liquid to gas. Gas particles are more disordered than liquid.
B. Dry Ice sublimating: Sublimating refers to a phase change from solid to gas. This is an increase in entropy, this is because the gas particles are more disordered than solid particles
C. Water Boiling: The phase change is from liquid to gaseous state. There is an increase in entropy. Gas particles are more disordered than liquid.
D. Ice melting: The phase change is from solid to liquid state. There is an increase in entropy. Liquid particles are more disordered than that of solid.
E. Water Freezing: The phase change is from liquid to solid state. There is a decrease in entropy. solid particles are less disordered than those of liquid.
Silver is an element that can conduct electricity and heat and is shiny. Silver is most
likely
Answer:
a metal
Explanation:
metals are good conductors of electricity
Silver shows electrical and thermal conductivity and shows luster. These properties are feature of a metal and thus silver is most likely a metal.
What is silver?Silver is 69th element in the periodic table and is included in the transition metals. It is a d-block element with the symbol Ag came from the Latin name argentum.
Silver is a common component in electronic devices since it is the most conducting metal . Thermal conductivity and shining property are other features of silver. Due to its shining silver is used to make ornaments.
The highly conducting and shining materials are termed as metals therefore, silver is a metal.
To learn more about silver, refer the link below:
https://brainly.com/question/6434391
#SPJ5
PES uses which type of electromagnetic radiation?
A. Ultraviolet and X-rays
B. Infrared
C. Ultraviolet and visible
D. Radio
Answer:
the answer should be A if im correct
Explanation:
Weathering affect rock formations by .......
HELP MEEE
Explain how this change will impact the transfer of thermal energy in the solar cooker design and describe one possible design improvement the students can make to compensate for this change
Answer:it conduct thermal conductivity because of the heat it holds
Explanation:
When energy is transformed from one form to another, the appliance could be redesigned in such a way that this transfer is minimized.
Transfer of thermal energyWe know from the principle of transfer of energy that energy can neither be created nor destroyed but is transformed from one form to another. The image is not shown here but I will try to explain what energy transfer is.
Usually, when energy is transformed from one form to another, the appliance could be redesigned in such a way that this transfer is minimized.
Learn more about energy transfer:https://brainly.com/question/18649915?
#SPJ2
Is speed almost never constant
depends on the situation, but scientifically, Einstein's theory of special relativity sets the speed of light, 186,000 miles per second (300 million meters per second). But some scientists are exploring the possibility that this cosmic speed limit changes. The speed of light is constant, or so textbooks say. (google)
Identify the statements that correctly describe the saturation temperature of a solution. Select one or more:_________ a. Any temperature at which the solution is liquid The temperature at which b. the Ksp value can be calculated c. The temperature at which solid begins to appear from a cooled solution d. Any temperature at which all of the compounds is solid
Answer:
The correct options are "b" and "c". A further explanation is given below.
Explanation:
Saturation temperature can be determined where this enough of some other solution that is incorporated like that can be absorbed by a solvent. The formulation is saturated at this same stage, so Ksp could be computed. As well as the solid throughout solution should continue to appear upon freezing below a certain temperature.The other options offered aren't relevant to the situation described. So the equivalents above are the right ones.
The statements that are correctly explained the saturation temperature of a solution is the ksp value should be determined and the temperature where the solid started to appear from the cooling solution.
What is the Saturation temperature?It could be measured when there should be sufficient of some other solution that should be incorporated and the same should be absorbed by the solvent. The formulation should be saturated at a similar stage due to this the ksp should be determined. Also, the solid via the solution should continue to appear that based on the freezing below the specific temperature.
Learn more about temperature here: https://brainly.com/question/17427955
5ml of mixture of CH4 and C2H4 need 13.2 ml of oxygen for complete combustion.calculate the volume of each gas in the mixture based on the law of gaseous volume.
Answer:
Explanation:
CH₄ + 2O₂ = CO₂ + 2H₂O
C₂H₄ + 3O₂ = 2CO₂ + 2H₂O
Let volume of CH₄ be V , so volume of C₂H₄ will be 5 - V
CH₄ + 2O₂ = CO₂ + 2H₂O
1 vol 2 vol
V 2 V
V vol of CH₄ will require 2 V of O₂
C₂H₄ + 3O₂ = 2CO₂ + 2H₂O
5 - V 3( 5 - V )
5 - V vol of C₂H₄ will require 3 ( 5 - V ) vol of oxygen .
Total oxygen required = 2 V + 3 ( 5 - V )
2 V + 3 ( 5 - V ) = 13.2
2 V + 15 - 3V = 13.2
V = 1.8 ml
vol of CH₄ = 1.8
vol of C₂H₄ = 5 - 1.8 = 3.2 ml.
How many molecules of NH3 are in 45 mol of NH3 ?
Answer:
Explanation:
5
Which type of rock is most likely to form because of high heat and pressure?
igneous
magma
sediment
O metamorphic
Answer:
metamorphic
Explanation:
igneous is when the magma is cooling down, sedimentary is when the are formed by cementing underground. that is why the answer is metamophic
The rock that is most likely to form because of high heat and pressure is known as metamorphic rock. Thus, the correct option for this question is D.
What is the Rock cycle?The rock cycle may be defined as a type of cycle that involves the continuous process through which rocks are constructed, altered from one form to another, destroyed, and then formed again by the action of numerous external factors.
If a rock is exposed to great heat and extreme pressure, it undergoes metamorphism. Due to this, the rock does not melt all the way but it changes to a metamorphic rock that may significantly possess new mineral composition and texture.
Metamorphic rocks are rocks that have been altered from their original structure and properties to another due to immense heat and pressure effects.
Therefore, the rock that is most likely to form because of high heat and pressure is known as metamorphic rock. Thus, the correct option for this question is D.
To learn more about Metamorphic rocks, refer to the link:
https://brainly.com/question/398139
#SPJ6
The pH of a saturated solution of a metal hydroxide MOH is 10.15. Calculate the Ksp for this compound.
Answer:
[tex]Ksp=2.00x10^{-8}[/tex]
Explanation:
Hello!
In this case, since the pH of the given metal is 10.15, we can compute the pOH as shown below:
[tex]pOH=14-pH=14-10.15=3.85[/tex]
Now, we compute the concentration of hydroxyl ions in solution:
[tex][OH^-]=10^{-pOH}=10^{-3.95}=1.41x10^{-4}M[/tex]
Now, since this hydroxide has the form MOH, we infer the concentration of OH- equals the concentration of M^+ at equilibrium, assuming the following ionization reaction:
[tex]MOH(s)\rightarrow M^+(aq)+OH^-(aq)[/tex]
Whose equilibrium expression is:
[tex]Ksp=[M^+][OH^-][/tex]
Therefore, the Ksp for the saturated solution turns out:
[tex]Ksp=1.41x10^{-4}*1.41x10^{-4}\\\\Ksp=2.00x10^{-8}[/tex]
Best regards!
Please help me my teacher is screaming at me rn :(
are suppose to make ur own problem if so
I would do for time 2 distance would be 4 and keep adding on 2 example
time: 2
distance:4
time: 4
distance: 8
What is the molarity of chloride ion in a solution made by dissolving 1.300g of aluminumchloride in a total volume of 500.0mL?
Answer:
0.0582 M
Explanation:
The following data were obtained from the question:
Mass of AlCl3 = 1.3 g
Volume of water = 500 mL
Molarity of chloride ion (Cl¯) =?
Next, we shall determine the number of mole in 1.3 g of AlCl3. This can be obtained as follow:
Mass of AlCl3 = 1.3 g
Molar mass of AlCl3 = 27 + (35.5×3)
= 27 + 106.5
= 133.5 g/mol
Mole of AlCl3 =?
Mole = mass /molar mass
Mole of AlCl3 = 1.3/133.5
Mole of AlCl3 = 0.0097 mole
Next, we shall convert 500 mL to litres (L). This can be obtained as follow:
1000 mL = 1 L
Therefore,
500 mL = 500 mL × 1 L / 1000 mL
500 mL = 0.5 L
Thus, 500 mL is equivalent to 0.5 L.
Next, we shall determine the molarity of the AlCl3 solution. This can be obtained as follow:
Mole of AlCl3 = 0.0097 mole
Volume of water = 0.5 L
Molarity of AlCl3 =?
Molarity = mole /Volume
Molarity of AlCl3 = 0.0097 / 0.5
Molarity of AlCl3 = 0.0194 M
Next, we shall write the dissociation equation of AlCl3 in solution. This is illustrated below:
AlCl3 (aq) —> Al³⁺ (aq) + 3Cl¯ (aq)
From the balanced equation above,
1 mole of AlCl3 produced 3 moles of Cl¯.
Finally, we shall determine the molarity of the chloride ion Cl¯ in the solution as follow:
From the balanced equation above,
1 mole of AlCl3 produced 3 moles of Cl¯.
Therefore, 0.0194 M AlCl3 will produce = 0.0194 × 3 = 0.0582 M Cl¯.
Thus, the molarity of the chloride ion, Cl¯ in the solution is 0.0582 M.
how does skeletal and circulatory system work together
Answer:Your circulatory system delivers oxygen-rich blood to your bones. Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain internal stability and balance, otherwise known as homeostasis
Explanation:
