25) What occurs when an atom loses an electron?
A) The atom's radius decreases and the atom becomes a negative ion.
B) The atom's radius decreases and the atom becomes a positive ion.
C) The atom's radius increases and the atom becomes a negative ion.
D) The atom's radius increases and the atom becomes a positive ion.
Answers
Answer:
An electron has a negative charge therefore, losing the electron will cause the atom to be a positive ion. An ion is an atom where the number of protons does not equal the number of electrons.
Related Questions
Determine the phase or phases in a system consisting of H2 O at the following conditions and sketch the p−v and T−v diagrams showing the location of each state. a) p=100lbf/in^2,T=327.86∘F b) p=140lbf/in2^,T=327.86∘F c) T=100∘C,p=0.4 bar d) T=20∘C,p=50bar e) p=14.7lbf/in^2,T=20∘F
Answers
The phases in the system under different conditions are: a) superheated vapor, b) compressed liquid, c) mixture of liquid and vapor, d) compressed liquid, and e) mixture of solid and vapor.
The question asks us to determine the phase or phases in a system consisting of H2O at different conditions and sketch the p-v and T-v diagrams. Let's go through each condition:
a) At p=100 lbf/in^2 and T=327.86∘F, we can refer to the steam tables to find the corresponding saturation pressure and temperature. We find that the saturation pressure at this temperature is approximately 83.3 lbf/in^2, which is less than the given pressure. Hence, the phase will be superheated vapor.
b) At p=140 lbf/in^2 and T=327.86∘F, the saturation pressure is still 83.3 lbf/in^2, but the given pressure is higher. Therefore, the phase will be compressed liquid.
c) At T=100∘C and p=0.4 bar, we convert the pressure to lbf/in^2, which is approximately 5.8 lbf/in^2. Comparing this with the saturation pressure at this temperature, which is around 14.7 lbf/in^2, the given pressure is lower. Thus, the phase will be a mixture of liquid and vapor.
d) At T=20∘C and p=50 bar, we convert the pressure to lbf/in^2, which is approximately 725.2 lbf/in^2. The saturation pressure at this temperature is much lower, around 0.034 lbf/in^2. Therefore, the phase will be compressed liquid.
e) At p=14.7 lbf/in^2 and T=20∘F, we can refer to the steam tables to find the corresponding saturation pressure and temperature. The saturation pressure at this temperature is approximately 0.06 lbf/in^2, which is higher than the given pressure. Hence, the phase will be a mixture of solid and vapor.
In conclusion, the phases in the system under different conditions are: a) superheated vapor, b) compressed liquid, c) mixture of liquid and vapor, d) compressed liquid, and e) mixture of solid and vapor.
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What change is observed in a distribution curve for a trait affected by directional selection? A- It shifts to the right and to the left. B- It shifts to the left. C- it shifts to the right. D- It shifts either to the right or to the left.
Answers
Answer: C- it shifts to the right.
Explanation:
Directional selection occurs when individuals with a certain trait are favored over others, leading to a shift in the distribution of the trait towards one direction. Specifically, the curve shifts towards the side where the individuals with the favored trait are located, which in this case is towards the right. This means that over time, more individuals in the population will have the favored trait, and the mean value of the trait will increase.
What's mass and volume when it comes from properties of matter?
Answers
Answer: Mass is the amount of matter in a substance. Volume is the amount of space matter takes up. Matter has both physical and chemical properties.
Explanation:Y w
A solution is prepared by adding 750.0 mL of 4.00 x 10^-33 M Ce(NO3)3 to 300.0 mL of 2.00 x 10^-2 M KIO3. Will Ce(IO3)3 (Ksp = 1.9 × 10^-10) precipitate from this solution?
Answers
Ce(IO3)3 will not precipitate from the solution.
Solution explained.
To determine if Ce(IO3)3 will precipitate from the solution, we need to calculate the concentration of Ce3+ and IO3- ions in the solution, and then use the solubility product constant (Ksp) to determine if a precipitate will form.
First, let's calculate the number of moles of Ce(NO3)3 added to the solution:
nCe(NO3)3 = (750.0 mL) (4.00 x 10^-33 mol/L) = 3.00 x 10^-30 mol Ce(NO3)3
Next, let's calculate the number of moles of KIO3 in the solution:
nKIO3 = (300.0 mL) (2.00 x 10^-2 mol/L) = 6.00 x 10^-3 mol KIO3
Since KIO3 is a strong electrolyte, it will dissociate completely in solution, giving us the same number of moles of IO3- ions:
nIO3- = 6.00 x 10^-3 mol
Since Ce(NO3)3 is also a strong electrolyte, it will dissociate completely to give us 3 times the number of moles of Ce3+ ions:
nCe3+ = 3.00 x 10^-30 mol x 3 = 9.00 x 10^-30 mol
Now, let's calculate the concentration of Ce3+ ions:
[Ce3+] = (9.00 x 10^-30 mol) / (1050.0 mL) = 8.57 x 10^-34 M
Finally, we can calculate the ion product (IP) of Ce(IO3)3:
IP = [Ce3+] [IO3-]^3 = (8.57 x 10^-34)^1 (6.00 x 10^-3)^3 = 7.34 x 10^-41
Comparing this value to the Ksp of Ce(IO3)3 (1.9 × 10^-10), we see that IP << Ksp.
Therefore, Ce(IO3)3 will not precipitate from the solution, and the solution will remain homogeneous.
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usnco when the substances are arranged in order of increasing boiling points, which order is correct?
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Full Question
usnco when the substances are arranged in order of increasing boiling points, which order is correct?
Describe and explain the trend in atomic a.radius within the group.Explain the difference between the size of b.the atoms and the size of the ions.
Answers
Answer:
A. The atomic radius increases (in a group) with the increasing atomic number. This is because atomic size generally increases from top to bottom within a group because the greater the number of protons means the greater amount of electrons. The amount of electrons in orbitals determine an atom's size/radius.
B. Since Group 1A (Alkali Metals) are metals, they tend to form cations. Cations are always smaller than their original atom because the greater positive charge from the nucleus closes in the space between it and the electrons, thus "shrinking" its size. This is why the ionic radii are smaller than the atomic radii of the same element.
I hoped this helped <3
Explanation:
What is the mass (in grams) of 1. 250 x 1024 atoms of copper (Cu)?
Answers
The mass of 1.250 x 10^24 atoms of copper is approximately 131.76 grams.
To determine the mass of 1.250 x 10^24 atoms of copper (Cu), we need to use the atomic mass of copper and Avogadro's number.
The atomic mass of copper (Cu) is approximately 63.55 grams/mole. This means that one mole of copper contains 6.022 x 10^23 copper atoms, which is Avogadro's number.
First, let's calculate the number of moles of copper atoms in 1.250 x 10^24 atoms:
1.250 x 10^24 atoms / (6.022 x 10^23 atoms/mole) = 2.074 moles
Next, we can use the molar mass of copper to convert the number of moles to grams. The molar mass of copper is 63.55 grams/mole.
Mass = Number of moles x Molar mass
Mass = 2.074 moles x 63.55 grams/mole
Mass = 131.76 grams
Therefore, the mass of 1.250 x 10^24 atoms of copper is approximately 131.76 grams.
It's important to note that this calculation assumes 100% purity and does not account for isotopic variations in copper. In reality, copper can have different isotopes with slightly different atomic masses.
However, for most practical purposes, using the average atomic mass of copper provides a good approximation for the mass of a given number of copper atoms.
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contrast neutron star and a star
Answers
Answer: Neutron stars got their name because their cores have such powerful gravity that most positively charged protons and negatively charged electrons in the interior of these stars combine into uncharged neutrons. Neutron stars produce no new heat. However, they are incredibly hot when they form and cool slowly.
Explanation: How this helps :)
Which of the following statements regarding carbon is false? Group of answer choices Carbon has the capacity to form single and double bonds. Carbon has the ability to bond with up to six other atoms. Carbon has a tendency to form covalent bonds. Carbon has the ability to bond together to form extensive branched or unbranched "carbon skeletons."
Answers
Answer: The statement, carbon has the ability to bond with up to six other atoms is false.
Explanation:
Carbon is a group 14 element and it is a non-metal. The atomic number of carbon is 6 and its electronic distribution is 2, 4.
This means that there are 4 valence electrons present in it. Also, in order to attain stability a carbon atom forms only covalent bonds, that is, it shares its valence electrons with its own atoms or atoms of other elements.
Carbon has the capacity to form single and double bonds.
As valency of carbon is four so it can only combine to 4 other atoms vis single bond and it cannot bond with up to six other atoms.
Carbon shows the property of catenation, that is, it forms covalent bonds with its own atoms in a large number. So, carbon has the ability to bond together to form extensive branched or unbranched "carbon skeletons".
Thus, we can conclude that the statement, carbon has the ability to bond with up to six other atoms is false.
the dirty dozen threats to internal validity is called___
Answers
The dirty dozen threats to internal validity is called "dirty" because it refers to a set of potential sources of error or bias that can contaminate research results, compromising the validity of the study.
These threats can include issues such as history effects, maturation, testing effects, regression to the mean, selection bias, and many others. By identifying and addressing these threats, researchers can improve the validity and reliability of their findings.The "dirty dozen" threats to internal validity are so named because they can "dirty" or contaminate the results of a study. Some of the other potential sources of error or bias include instrumentation effects, mortality or attrition, selection-history interaction, and diffusion or imitation of treatment effects. By understanding and addressing these threats, researchers can increase the likelihood that their findings accurately reflect the effects of the variables they are studying. It's important to note that not all studies will face all of these threats, and some threats may be more relevant depending on the specific research question and design.
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The dirty dozen threats to internal validity is called a checklist or a framework for identifying potential sources of bias or confounding in research studies. This refers to 12 common threats to internal validity, which can impact the accuracy and reliability of a study's results. These threats include history, maturation, testing, instrumentation, statistical regression, selection bias, experimental mortality, selection-maturation interaction, diffusion or imitation of treatments, compensatory rivalry, demoralization, and compensatory equalization of treatments.
It includes twelve common threats that may compromise the validity of study findings, such as history, maturation, testing effects, selection bias, instrumentation, and experimenter bias. Researchers can use this checklist to systematically evaluate and control for these threats when designing, conducting, and interpreting their studies.
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Write The molecular formula Of The following substances in the given pattern
1. ferrous oxide
2. silicon chloride
3. barrium nitrate
4. calcium hydroxide
Answers
Answer:
1. FeO
2.
3. Ba(NO3)2
4. Ca(OH)²
Explanation:
sorry I didn't knew of no 2 the others were on my book but not that one, and of no 4 the power 2 must be down
What is the relationship between [conc] and time for a SECOND-order rxn?
Answers
For a second-order reaction, the relationship between the concentration and time is described by the second-order rate law, which is given as rate = \(k[conc]^2\).
This means that the rate of the reaction is proportional to the square of the concentration of the reactant. As the reaction proceeds, the concentration of the reactant decreases, and consequently, the rate of the reaction also decreases.In other words, the rate of the reaction decreases as the concentration of the reactant decreases over time. This relationship is different from that of a first-order reaction, where the rate is directly proportional to the concentration of the reactant, and the rate decreases exponentially over time.
It is also important to note that for a second-order reaction, the half-life is directly proportional to the initial concentration of the reactant. This means that the higher the initial concentration, the shorter the half-life and vice versa.
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a scientist is interested in studying different elements. she has 4 different chemicals on her bench. examine the list of chemicals. how many different elements does she have available to study? chemical namechemical formula phosphoric acid h3po4 glucose c6h12o6 epsom salts mgso4 chlorate of potash kclo3
Answers
The different types of the elements does she have available to study are :
Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine.
1) The chemical formula of the phosphoric acid is : H₃PO₄
Elements : Hydrogen, phosphorus, oxygen
2) The chemical formula of the glucose is : C₆H₁₂O₆
Elements : Carbon, Hydrogen, oxygen
3) The chemical formula of the Epsom salts is : MgSO₄
Elements : Magnesium, Sulfur, Oxygen
4) The chemical formula of the chlorate of potash is : KClO₃
Elements : Potassium, Chlorine and Oxygen.
Thus, the Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine are the different elements to study.
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what is the ph of 25ml sample of 0.20 m c2h5nh2 is itrated with 0.25 what is the ph of the solution after 13.00ml of acid have been added to the amine od a solution containing 0.800 weak acid and 0.172 m conjugate base
Answers
The pH of the solution after adding 13.00 ml of acid cannot be determined without the pKa value of C2H5NH2 and the specific acid being added.
To determine the pH of the solution after adding acid to the amine, we need to consider the acid-base reaction between the weak acid (C2H5NH2) and the added acid.
The initial solution contains 25 ml of 0.20 M C2H5NH2. The acid being added has not been specified, so we'll assume it is a strong acid. Let's calculate the moles of C2H5NH2 initially present:
Moles of C2H5NH2 = Volume (in liters) × Concentration
Moles of C2H5NH2 = 0.025 L × 0.20 mol/L
Moles of C2H5NH2 = 0.005 mol
Since the weak acid C2H5NH2 dissociates partially, we need to consider the equilibrium reaction between C2H5NH2 and its conjugate base C2H5NH3+:
C2H5NH2 (weak acid) ⇌ C2H5NH3+ (conjugate base) + H+ (proton)
The acid being added will react with the C2H5NH2 and consume some of the weak acid and its conjugate base. The remaining concentration of weak acid and conjugate base after adding 13.00 ml of acid can be calculated using the equation:
Remaining moles = Initial moles - Moles of acid added
Moles of acid added = Volume (in liters) × Concentration
Moles of acid added = 0.013 L × Acid concentration
The concentrations of the weak acid and conjugate base can be calculated by dividing their respective moles by the total volume of the solution (initial volume + volume of acid added).
Now, we can calculate the pH of the solution after the acid is added:
Calculate the remaining moles of weak acid and conjugate base.
Calculate the remaining concentrations of weak acid and conjugate base.
Calculate the new concentration of the weak acid and conjugate base after adding the acid.
Use the Henderson-Hasselbalch equation to calculate the pH:
pH = pKa + log([conjugate base]/[weak acid])
In this case, pKa is the dissociation constant of the weak acid C2H5NH2.
To determine the pH of the solution after adding acid to the amine, we need to calculate the remaining moles and concentrations of the weak acid and its conjugate base. Using the Henderson-Hasselbalch equation with the new concentrations, we can calculate the pH of the solution. The specific values of the acid being added and the pKa of C2H5NH2 are not provided, so the final pH cannot be determined without those values.
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An example of a high explosive is what?
Answers
Answer:
High explosives do not need to be contained to make their bang. Nitroglycerine, trinitrotoluene, and RDX are high explosives.
Explanation:
In nuclear fission reactions, what causes the atom's nucleus to become
unstable
Answers
Answer:
the forces i think
Explanation:
The absorption of a free moving neutron by the atoms nucleus
(A P E X)
You dissolve 0.66 g of potassium chloride (KCl) in 700 ml of water.What is the molarity of the solution?(From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g)=Enter the value rounded to three decimal places with no units
Answers
Answer
0.009 mol/L
Explanation
Given:
Mass of KCl = 0.66 g
Volume of water = 700 mL = 0.7 L
From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g
What to find:
The molarity of the solution
Step-by-step solution:
The formula to calculate molarity is:
\(\text{Molarity }=\frac{Mole}{Volume\text{ in L}}\)The first step is to calculate the molar mass of KCl
KCl = Mass of 1 mol K + Mass of 1 mol Cl
KCl = 39.10 g + 35.453 g
KCl = 74.553 g
So the molar mass of KCl = 74.553 g/mol
The next step is to determine the number of moles of KCl in 0.66g of KCl:
\(\text{Mole }=\frac{Mass}{Molar\text{ mass}}=\frac{0.66\text{ g}}{74.553\text{ g/mol}}=8.852762464\times10^{-3}mol\)Put the values of mole and volume into the molarity formula above to determine the molarity of the solution:
\(\begin{gathered} \text{Molarity }=\frac{8.852762464\times10^{-3}\text{ mol}}{0.7\text{ L}}=0.00885276molL^{-1} \\ To\text{ thr}ee\text{ decimal places,} \\ \text{Molarity }=0.009\text{ }molL^{-1} \end{gathered}\)The molarity is 0.009 mol/L
Some people say that only gay and bisexual men are likely to be infected with hub true false
Answers
Answer:
They do have a larger chance, but others might be infected too.
PLS GIVE BRAINLIEST
Answer:
thats false, yes they have a bigger chance but anyone can get it.
Explanation:
What pressure is exerted by 1.11 mol of hydrogen gas in a 8.17 L container at 50◦C?
Answer in units of atm.
Answers
Answer:
20.0
Explanation:
Given the following equation: 2C6H6 + 1502 - 12CO2 + 6H20
How many moles of O2 are needed to react with 4.0 moles of
Co HG?
a 30 moles
b 12 moles
C 4.0 moles
d 24 moles
Answers
Answer:
a) 30 moles
Explanation:
2C6H6 + 1502 -------> 12CO2 + 6H20
from reaction 2 mol 15 mol
given 4.0 mol x mol
x = 4.0*15/2 = 30. mol
An electron in the n = 5 level of an h atom emits a photon of wavelength 94. 98 nm. To what energy level does the electron move?.
Answers
The electron will move to energy level
n =1 ..
We have, an electron in the n= 5 level of an Hydrogen atom emits a photon of wavelength 94.98nm...
Using the Rydberg formula ,
1/ λ = R ( 1/ n²ⱼ- 1/n²ᵢ)
where, lambda ----> wavelength of photon
nⱼ----> excited energy level
nᵢ---> initial energy level at which electron of hydrogen atom emits photon
R -----> Rydberg constant
photon are packet of energy.
we have give nᵢ = 5 , lambda = 94.98nm = 94.98×10⁻⁹m
R = constant = 1.097× 10⁷ m⁻¹
Substitute the values in formula we get ,
10⁹/ 94.98 = 1.097× 10⁷ ( 1/ n²ⱼ - 1/ 25) ⇒ 1/ n²ⱼ - 1/25 = 10^2/94.98×1.097 = 0.95975.68 ⇒ 1/n²ⱼ= 0.99975 ⇒ n²ⱼ= 1.00024 => nj = 1.00012
So, the electron moves from n= 5 energy level to to n= 1 energy level.
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I need help urgently see where it says text here answers the questions PLS I NEED AN 100%
Answers
Based on the properties of elements, atoms, compounds and mixtures:
Part 1:
There are four protons in the atomThere are two electrons in the atom.There are five neutrons in the atomThe atom has a negative chargePart 2: Oxygen
The atomic number is the number of protonsThe atomic mass represents the sum of the mass of the proton and neutronPart 3:
Pure element = CMixture of element & compound = DPure compound = BMixture of two compounds = AWhat are elements, atoms, compounds and mixtures?Elements are pure substances which cannot be split into simpler substances by an ordinary chemical process.
Atoms are the smallest particle of elements that can take part in a chemical reaction.
Compounds are substances composed of two or more elements chemically combined together
Mixtures are substances composed of two or more constituents physically combined together.
Considering the given questions:
How many protons are in this atom? There are four protons in the atomHow many electrons are in this atom? There are two electrons in the atom.How many neutrons are in this atom? There are five neutrons in the atomDoes this atom have a positive, negative, or neutral charge? The atom has a negative charge as it has lost two electrons.Oxygen 15.999
What does the atomic number represent? The atomic number is the number of protonsWhat does the atomic mass represent? The atomic mass represents the sum of the mass of the proton and neutronThe correct matches are:
Pure element = CMixture of element & compound = DPure compound = BMixture of two compounds = ALearn more about elements, compounds and mixtures at: https://brainly.com/question/519068
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The decomposition of A to B is a first-order reaction with a half-life of 32.8 min:
A → 2B
If the initial concentration of A is 0.595 M, how long will it take for the concentration of A to decrease by 10.4 %?
Answers
Which step of the scientific method is the scientist using?
"My graph shows that students perform better on tests in cooler room temperatures."
Experimentation
O Analyze Data and Draw Conclusions
Observation
Report Results
Answers
he's observing and analyze data to see if its correct. I hope this helps
How would you prepare a 1 L solution of 3 M MgO?
Answers
Answer: 175.35g
Explanation: A 3 M solution has 3 moles of solute per litre.
The mass of one mole of NaCl equals the MW of NaCl MW = 35.45 + 23 =58.45 g/mol
The mass of 3 moles is 58.45 g/mol ×3 mol=175.35 g NaCl or 200 g rounded to one sigfig.
How would you measure the specific latent heat of vaporisation of a liquid?
Answers
Answer:
Ramsey and Marshall method.
Explanation:
The specific latent heat of vapourization of a liquid is measured by a modification of the method of Ramsey and Marshall in the year 1896.
In 1869, mendeleev created a periodic table in which elements were ordered by weight and placed in groups based on their chemical properties. mendeleev's decision to design the periodic table in this way allowed immediate advances in chemistry by.?
a.) providing an explanation for the reactive properties of the alkali metals
b.) providing a framework for models of electron configurations
c.) predicting the existence of a group of undiscovered inert gases
d.) predicting the properties of undiscovered elements in specific atomic weight ranges.
please explain
Answers
Answer:
D
Explanation:
Mendeleev periodic table predicted the properties of undiscovered element like the eka-aluminium.
Help me Please!!!!!!!!
Answers
In order to heat 7.40g of water to a higher temperature, 526.35 joules of heat energy are needed.
How is heat energy measured and calculated?Q = m•C•ΔT, Where Q is the amount of heat that is transported to or from the item, m is the object's mass, C is the material's specific heat capacity, and T is the change in temperature that results as a result.
7.40g of water needs 526.35 joules of heat energy to reach the desired temperature.
According to the following formula, the amount of energy is expressed:
The specific heat of water is 4.184 J/g0C and its mass is 7.40 grams.
In the formula, replace the specified parameters with:
In order to heat 7.40g of water to a higher temperature, 526.35 joules of heat energy are needed.
In order to heat 7.40g of water to a higher temperature, 526.35 joules of heat energy are needed.
The complete question is,
The temperature of 7.40g of water must be raised from 29.0 OC to 46.0 OC. Calculate the joules of heat energy needed to do so. 4.184 J/gOC for water's specific heat.
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The 400.0g of water requires 526.35 joules of heat energy.
What is heat energy?The formula,
Q = m•C•T, where Q is the amount of heat transported to or from the item, m is the mass of the object, C is the specific heat capacity of the material, and T is the temperature change as a result.
To reach the desired temperature, 400.0g of water requires 526.35 joules of heat energy.
The amount of energy is expressed using the following formula:
Water has a specific heat of 0.664 J/g0C and a mass of 400.0 grams.
Replace the specified parameters in the formula with:
526.35 joules of heat energy are required to heat 400.0 g of water to a higher temperature.
526.35 joules of heat energy are required to heat 400.0g of water to a higher temperature.
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Question 53
The general type of subsurface formation in which groundwater contamination is likely to travel the farthest is:
a. Clay b. Granite
c. Limestone
d. gravel
Answers
The correct answer is c. Limestone. This is because limestone is a porous rock that can easily allow groundwater to flow through it, allowing contamination to travel farther distances compared to other subsurface formations like clay, granite, and gravel.
Additionally, the chemical composition of limestone can also make it more susceptible to certain types of contamination, such as from acidic or alkaline substances.
The general type of subsurface formation in which groundwater contamination is likely to travel the farthest is:
d. Gravel
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Which statement is true about heat transfer? *
5 points
a. Heat can only transfer when touching another object.
b. Heat always travels up.
c. Heat transfers from cooler to warmer objects.
d. Heat transfers from hotter to cooler objects.
Answers
Answer: A
Explanation:
heat always passes from a warmer object to a cooler object until all objects are the same temperature. Conduction is how heat travels between objects that are touching. Conduction travels fastest through solids, but liquids and gases can also conduct heat.