Answer:
becomes negatively charged
Explanation:
this is because when an object receives electrons it becomes negatively charged and the object that loses electrons becomes positively charged.
Answer:
First one because by adding more electrons it makes something more negative. So it becomes negatively charged
Commercial scuba divers use tanks filled with a mixture of gases known as Trimix on very long, deep dives. Trimix is composed of 70% nitrogen, 10% oxygen and 20% helium. The total pressure of the Trimix inside a certain tank at the beginning of the dive is 118.4 atm. A. What is the partial pressure of the oxygen in the tank?
Answer:
Partial pressure of O = 11.84 atm
Explanation:
To solve the excersise we think in the partial pressure law with mole fraction.
Mole fraction of gas = Partial pressure of gas / Total pressure
We have data of all the mole fractions:
0.70 N0.10 O0.20 HLet's find out the partial pressure of oxygen in the tank. We replace data in the formula:
0.10 = Partial pressure of gas / 118.4 atm
0.10 . 118.4 atm = Partial pressure of gas → 11.84 atm
If we determine all the partial pressures:
0.70 . 118.4 atm = 82.88 atm → Partial pressure N
0.20 . 118.4 atm = 23.68 atm → Partial pressure He
We can determine the partial pressure of the trimix.
Sum of partial pressures of each gas = Total pressure of the mix
11.84 atm + 82.88 atm + 23.68 atm = 118.4 atm
(A way to see, if our operations were ok)
The partial pressure of oxygen in the tank is required.
The partial pressure of the oxygen in the tank is 11.84 atm.
[tex]x_o[/tex] = The mole fraction of oxygen = 10%
[tex]p[/tex] = The total partial pressure in the tank = 118.4 atm
The mole fraction of a gas is equal to the ratio of partial pressure of the gas to the total partial pressure.
[tex]x_o=\dfrac{p_o}{p}\\\Rightarrow p_o=x_op\\\Rightarrow p_o=0.1\times 118.4\\\Rightarrow p_o=11.84\ \text{atm}[/tex]
The partial pressure of the oxygen in the tank is 11.84 atm.
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When a machine does work, a trade-off occurs. Which of the following best exemplifies this trade-off?
A. A pulley changes the direction of your force, but requires a greater input force.
B. A lever increases output force and the distance the load moves.
C. A wheel and axle increases output force and the distance the load moves.
D. A ramp allows you to decrease force, but requires a greater distance.
Answer:
A
A pulley changes the direction of your force, but requires a greater input force.
Explanation:
A pulley changes the direction of your force, but requires a greater input force when machine does work. so option A is correct.
What is machine ?Any tool that makes work easier is a machine. We can complete tasks with the aid of machines by using less force and energy.
By using a simple machine, you can move anything with less effort, but you have to move it farther to do the same amount of labor.
Our bodies function like machinery. For instance, our arms can be compared to a machine that can be utilized to quickly lift objects.
By using a machine to perform work, either the force or the distance across which the force is delivered may rise, but not both at once. In other words, as one grows, either force or distance, the other must decrease. The force-distance trade off is what is meant by this.
Thus, option A is correct.
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Why is the organization of the periodic table by physical properties not very useful?
Answer:
It shows no regular pattern
Explanation:
Physical properties of an element are those we can observe and feel with our senses. Also, the use special equipment can enhance our perception of these properties.
The same physical property can be shared different number elements. On the periodic table, all the elements in group 1 and 2 are metals. This is not very useful for scientists whose emphasis is to distinguish one atom from the other. Therefore, physical properties are highly limited in the organization of the periodic table.Which of the following elements has the highest electronegativity?
*potassium
*lithium
*chlorine
*oxygen
when dilute HCL is added to zinc pieces taken in a test tube
Answer:
zince chloride will be formed and hydrogen gas will be librated.
Explanation:
When dilute HCl is added to zinc pieces, a rection will takes place as follows :
[tex]Zn+HCl\rightarrow ZnCl_2+H_2[/tex]
It means that zinc chloride will form when zinc reacts with dilute HCL. Also hydrogen gas will produced.
As zinc is more reactive than hydrogen, it displaces hydrogen from its solution and forms zinc chloride. The form product is white in color and H₂ is an odorless gas.
Hence, zince chloride will be formed and hydrogen gas will be librated.
are the 14 transition metals that follow lanthanum in the periodic table.
Answer: Lanthanide or Lanthanides
Explanation: Sorry that I don’t have an explanation. I just answered the question correctly myself. <33
The lanthanide and actinide are present in the periodic table as a transition metals.
What is periodic table?Periodic table is defined as a tabular arrangement of chemical elements ordered by increasing atomic number and element groups.
The latest periodic table has an ordered grouping of the 118 known chemical elements.
Lanthanide is defined as any of the elements with rising atomic numbers beginning with lanthanum or cerium and ending with lutetium.
Lanthanide are rarely found on earth i.e. they are called rare earth metals.
Actinide is defined as any of the elements with increasing atomic numbers beginning with actinium or thorium and ending with lawrencium.
Actinide are the radioactive metals.
Thus, the lanthanide and actinide are present in the periodic table as a transition metals.
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If 56 grams of nitrogen is mixed with 56 grams of oxygen, what is the pressure of each gas if the total
pressure is 1320 Torrs?
Answer:
pN₂ = 695 torr; pO₂ = 625 torr
Explanation:
Step 1: Calculate the moles of each gas
The molar mass of N₂ is 28.01 g/mol.
56 g × 1 mol/28.01 g = 2.0 mol
The molar mass of O₂ is 32.00 g/mol.
56 g × 1 mol/32.00 g = 1.8 mol
Step 2: Calculate the total number of moles
n = nO₂ + nN₂ = 1.8 mol + 2.0 mol = 3.8 mol
Step 3: Calculate the partial pressure of each gas
We will use the following expressions.
pN₂ = P × X(N₂)
pN₂ = 1320 torr × (2.0 mol/3.8 mol)
pN₂ = 695 torr
pO₂ = P × X(O₂)
pO₂ = 1320 torr × (1.8 mol/3.8 mol)
pO₂ = 625 torr
Name the following molecules:
P4S5______________________________________________
CH4______________________________________________
NF3 ______________________________________________
N2O______________________________________________
Match each CDE with the correct category it falls into.
Answer:
evaluation
Explanation: Big brain
What are the needs & advantages of career planning?
in the blanks using the options given below:
Career is a sequence of related jobs arranged in a .........order.
Wrong choice of career may lead to.................
Agriculture, veterinary and nursing provide better........ ... to
young people.
Poor health and safety condition in an organization
causes.................effect on the choice of career.
The essence of career planning is the................ of individual goal
with organizational goal.
gative, hirarchical, frustration, bridging, lucrative, attraction
Answer:
The correct options are;
1) Hierarchical
2) Frustration
3) Attraction
4) Gative
5) Bridging
Explanation:
A career can be defined as a person's trade or occupation, which he or she engages and progresses in for a considerable portion of his or her life
When a person is engaged in a career that is not best suited to them can therefore lead to frustration, due to the length of time required in building a career
Agriculture, veterinary and nursing are mainly hands on or time input (for agriculture) careers, that seek to attract young people
The existence of poor health and safety conditions in an organization limits the advancement of individuals in their chosen career within the organization
Therefore, we have;
Career is a sequence of related jobs arranged in a hierarchical order
Wrong choice of career may lead to frustration
Agriculture, veterinary, and nursing provide better attraction to young people
Poor health and safety conditions in an organization causes gative effect on the choice of career
The essence of career planning is the bridging of individual with organizational goal.
how many electrons does fluorine take
Answer:
Fluorine has nine electrons
Which of these share chemical bonds
Mixtures
all matter
Compounds
Answer:
Compounds
Explanation:
All compounds of a substance shares chemical bonds between them and their structures.
The bonds can come in different forms. Compound are held by chemical bonds within their atoms.
Mixtures are composed of different atoms and compoundsThey are mostly not chemically bonded togetherMixtures can be separated by physical means because they lack bonds between them. Compounds are chemically bonded togetherWhich square (A, B, C, or D) represents the repeating subunit of the polymer shown?
Answer:
c is the answer
Explanation: just answerd it and got it correct
A compound is different from a mixture because a compound
Answer:
Compound: A substance that is made up of more than one type of atom bonded together.
Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.
Explanation:
The different substances in a mixture are not chemically combined, whereas the different elements in a compound are. The atoms do not combine in the mixture, but they combine when they form a compound.
Step1: Cl3 Cl2 +Cl Step2: Cl3+Cl 2Cl2 Which is the activated omplex for step 2?
Answer:
The answer is "[tex]\bold{Cl_4}[/tex]"
Explanation:
Please find the complete question in the attachment file.
In this question, it uses the Chemical equations, which is also known as the order to comply with the Law on Mass Conservation, substances must be balanced wherever volume cannot be generated or lost. This should be reacted that the reaction weight becomes equal to a product mass.
what happen if carbon is heated with oxygen?
what happens if magnesium is burnt in oxygen?
what happens if iron is heated with oxygen?
Answer:
abc
Explanation:
Which of the following is NOT an example of potential energy?
A. car moving down the highway
B. log on a fire
C. person standing on a diving board
D. liter of gasoline
Answer:
A. car moving down the highway
Explanation:
Potential energy is when the energy is being held in, as in, it is very still, and not moving.
When a car is moving down a highway, it is releasing kinetic energy, instead of potential.
help pls i give 20 points
What type od chemical reaction is the example below?
2 H2O2
2 H2O + O2
a
synthesis
combination
decomposition
single replacement
С
Answer:
Decomposition
Explanation:
One reactant has formed two products
A sample of neon gas occupies a volume of 752 mL at
298K. What volume will the gas occupy at 320.K?
please helppppp
Answer:
815mL am 10000000% sure
Which of these elements could gain one electron to form an ionic bond with potassium explain why
Answer:
ChlorineIt has 7 electrons in it last shell. it will gain one electron to complete its octet and become Cl-. The ionic bond of chlorine form with potassium is Kcl ( potassium chloride)
Phosphorus has 5 electrons in its last shell it need 3 more electron to stable .Sulphur has 6 electron. it needs 2 electrons Argon is already stable as it has 8 electrons in its last shell it will not gain or loose any electronsTo solve such this we must know the concept of ionic reaction. Cl is the element could gain one electron to form an ionic bond with potassium.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound.
Potassium will act as cation as K⁺, chlorine has 7 electrons in it last shell, it can gain one electron to complete its octet and become Cl⁻. The ionic compound of Cl with K is KCl.
Phosphorus has 5 electrons in its last shell it so, it needs 3 more electron to get stable .Sulphur has 6 electron, it needs 2 electrons to get stable. Argon is already stable as it has 8 electrons in its last shell so, it will not gain or loose any electrons.
Therefore, Cl is the element could gain one electron to form an ionic bond with potassium.
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30 points please help!!!!!!!!
pH 3 = 10 times of pH 4 in terms of H⁺ concentration
Further explanationpH is the degree of acidity of a solution that depends on the concentration of H⁺ ion. The greater the value the more acidic the solution and the smaller the pH.
pH = - log [H⁺]
So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.
A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.
So pH 3 and pH 4 have a difference in the concentration of H⁺ ion of 10¹ = 10
pH 3 = -log[10⁻³]
pH 4 = - log[10⁻⁴]
pH 3 = 10 times of pH 4 in terms of H⁺ concentration
And pH 3 is stronger in acid than pH 4
Consider the following incomplete reaction. Mg + 2Y ---> MgCl₂ + H₂ Choose the formula for the missing substance Y.
A. H₂Cl
B. HCl
C. Cl
D. Cl₂
What is the name of the particle made up of 2 protons and 2 neutrons?
Answer: It’s called a alpha particle
Explanation:
Which part of the atom determines how an element interacts in a chemical reaction?
Ansewer : nucleus
The number of protons in the nucleus determines which element an atom is, while the number of electrons surrounding the nucleus determines which kind of reactions the atom will undergo. The three types of subatomic particles are illustrated below for an atom of helium—which, by definition, contains two protons.
Please help me am stuck between "B" and "C"
Which of the following is the best example of a heterogeneous mixture?
A. Lemonade made of water, lemonade powder mix, and sugar.
B. An omelet made of scrambled eggs and cheddar cheese.
C. Trail mix made of raisins, peanuts, and chocolate candies.
D. A glass of ice water made of ice cubes and pure water.
Answer:
I think it's C
Explanation:
all the other ones are homogeneous because they are uniform and the same when mixed
a. lemonade is one color(yellow when mixed the same throughout)
b. omelet is scrambled together and the cheese and eggs melt together to be one
c.ice cubes and water are the same, both water
trail mix is the only different one made with different ingredients that standout
hetero- different (trail mix)
homo- same (lemonade)
Write the combustion product of butane in excess
oxygen.
Answer:
The name of the products are CO2 = carbon dioxide and H2O = water. The type of reaction is a combustion reaction.
Explanation:
Answer:
carbon di oxide and water
Please answer fast, shouldn't take long to do ^-^ (will give brainliest)
Which is the correct formula for iron (II) phosphate?
a. Fe2PO4
b. Fe3(PO4)2
c. Fe2PO3
d. Fe(PO4)2
e. Fe(PO3)2
Answer:
B
Explanation:
PLEASE HELP
The area in which you live has a particular climate. It also has weather. Which claim describes the difference between climate and weather?
Group of answer choices
Weather is determined by temperature and precipitation, whereas climate is determined only by humidity, air pressure, and wind conditions.
Climate is the condition of Earth’s atmosphere at a particular time and place, whereas weather is the characteristic climate in an area over a long period of time.
Climate is determined by temperature and precipitation, whereas weather is determined only by humidity, air pressure, and wind conditions.
Weather is the condition of Earth’s atmosphere at a particular time and place, whereas climate is the characteristic weather in an area over a long period of time.
Answer:
Weather is the condition of Earth’s atmosphere at a particular time and place, whereas climate is the characteristic weather in an area over a long period of time.
Explanation:
Weather and climate are two very important conditions that describes the atmospheric overview of a place.
Weather is reported over a short period of time, it is the condition of the atmosphere at a particular time and place.
Climate is reported over a long period of term. The average weather condition of a place over a long period of time is the climate.
The most important control over the climate of a place is the temperature and amount of precipitation it receives over a period of time. Weather conditions is reported using more diverse factors such a temperature, pressure, humidity, precipitation, etc.CH4(g) + 2O2(g) = CO2(g) + 2H2O(g)
How many moles of CH4 are required to react completely with 0.08 mole of O2?
Answer:
0.04 moles of CH₄ are required
Explanation:
Given data:
Number of moles of CH₄ required = ?
Number of moles of O₂ present = 0.08 mol
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
now we will compare the moles of oxygen and methane.
O₂ : CH₄
2 : 1
0.08 : 1/2×0.08 = 0.04
Thus, 0.04 moles of CH₄ are required.