Two elements have similiar characteristics when they belong to the same family that means that have placed in the same column of the periodic table. So in other words, Helium and Radon are very similar because they are in the same column. Let me know if you need others :)
Some pairs of elements that have similar properties is helium and radon.
The periodic table refers to a tabular display of the chemical elements. It depicts the organized array of all the chemical elements based on their increasing atomic number.
Some pairs of elements that have similar properties is helium and radon. It should be noted that they are both colorless and highly radioactive. They also have a short half life.
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choices for images
A.
The reaction between A and B is reactant favored.
B.
The amount of product is greater than the amount of reactant.
C.
The reaction uses all its reactants to form products.
D.
The reaction reaches equilibrium at 1.5 seconds.
E.
The amount of reactants is highest at equilibrium.
#2
This chemical equation is not balanced:
AgBr(s) → Ag(s) + Br2(g).
Why isn’t it possible for the reaction to occur as indicated by the unbalanced equation?
A.
There are more substances on the right side of the equation than on the left side.
B.
There is a gas on the right side of the equation but not on the left side.
C.
The bromine atoms must go through a liquid state before becoming a gas.
D.
There is more mass represented on the right side of the equation than on the left side.
E.
The bromine atoms on the right side of the equation are not bonded to another element.
1. I think its B but im not sure imma check again
2. Its D fo sho
One
Let's start by stating what we know is wrong. Equilibrium is achieved when the reactants and products have a stable concentration. That makes D incorrect. Equilibrium is not established until about the 6th or 7th second.
The fact that you get any products at all means that the reactants will become products. Just who is favored has to be looked at very carefully. The products start very near 0. They go up until their concentration at equilibrium. When the reach equilibrium, the products have increased to 17. The reactants have dropped from 40 to 27. By a narrow margin, I would say the products are favored.
C is incorrect. There are still reactants left.
E is incorrect. the reactants started out with a concentration of 40. The reaction is not instantaneous. The concentration was highest at 40 or right at the beginning. This assumes that the reactants were mixed and the products were produced and the water/liquid amount has not changed.
B is incorrect. The concentration of the reactants is higher at equilibrium.
A is wrong. It is product favored.
I'm getting none of the above.
Problem Two
AgBr is insoluble (very). You'd have to work very hard to get them to separate into their elemental form. Just putting AgBr in water isn't enough. Lots of heat and lots of electricity are needed to get the elemental form.
I suppose you should pick B. Mass must be preserved. But if you balanced the equation, it would work with heat and electricity.
What two things must you specify when describing the velocity of an object
When describing the velocity of an object, you must specify the both the speed and the direction.
That’s because velocity is a vector: it has both magnitude (speed) and direction.
If you say that a object is travelling southwest at 70 km/s, you are giving its velocity.
If you say that it is travelling at 70 km/s, you are giving its speed.
Final answer:
To describe the velocity of an object, you must specify the magnitude of speed and its direction, reflecting that velocity is a vector quantity unlike speed, which is scalar.
Explanation:
To describe the velocity of an object, one must specify two key things: (1) the magnitude of the speed, which is a scalar quantity representing how fast the object is moving, and (2) the direction of travel, which informs us of the orientation of the object's motion in space. For example, an object moving at 20 meters per second towards the north has a velocity that can be expressed as '20 m/s north'. This descriptive pairing of speed and direction is what differentiates velocity from speed, making velocity a vector quantity.
When illustrating velocity, a vector representation is often used, which is not always to scale but indicates direction and relative magnitude. For instance, in the case of the two airplanes with different speeds and directions discussed in the question, their velocities can be represented by arrows with lengths proportional to their speeds and pointing in the respective directions of travel - northeast and southwest.
A cookie recipe calls for 1 pound of butter. How many grams of butter would be needed for 3 batches
Answer: 1,360.776 grams
Explanation: given that a recipe/batch
requires 1 pound of butter
3 pounds would require x
Crosss multiplying we have
X=3 pounds
Converting pound to grams
1 pound =453.592grams
3pound =x grams
Xgrams =453.592*3
X=1,360.776 grams
A certain food web is made up of crabs, lobsters, seaweeds, and sea gulls. Which organism is most likely the producer in this food web?
The seaweed would be the producer in this exact food web.
Since the seaweed is the main source of food in that food web, it supplies everything else in the food web by supplying the animal that eats it, which supplies the animal that eats that animal, and so on.
Confusing, right?
Have a great day :)
Answer: seaweed
Explanation:
it’s the only plant in this food web
The measure of how closely a set of measurements are to each other is the best definition for which of the following terms. a error b uncertainty c accuracy d precision
Final answer:
Precision is the term that describes how closely a set of measurements are to each other, indicating the reproducibility of the measures under similar conditions. It differs from accuracy, which measures how close a measurement is to the true value. So the correct option is d.
Explanation:
The measure of how closely a set of measurements are to each other is best defined by the term precision. Precision refers to the reproducibility of measured values when repeated under similar conditions and indicates how close the measurements are to each other. It's important to note that precision is different from accuracy, which is a measure of how close a single measurement is to the correct or true value. Conversely, uncertainty is related to the potential variation in the measurements from the true value, providing an estimate of the range within which the true value lies.
2h20 The underlined portion of the chemical formula above represents the _____, which tells _____________________.
Answer : A chemical formula usually represents the chemical species involved in a chemical reaction. It gives a clear information about the chemical proportions of atoms present in an chemical compound.
This chemical formula usually employs the use of chemical element symbols, numbers, etc.
Also, sometimes other symbols are also used like parentheses, dashes, brackets, commas and plus (+) or minus (−) signs.
In the given question [tex]2H_{2}O[/tex] where 2 represents the number of hydrogen atoms present in that chemical species (water molecule), The number of oxygen atom is one because it doesn't has any number before it.
The subscript [tex]H_{2}[/tex] represents the valency of hydrogen, which is 2 here. In all if we have to calculate the total number of hydrogen in this water molecule which is 4 because 2 X 2=4; this is because 2 hydrogen is multiplied with 2 valency of hydrogen.
The answer is:
Coefficient; how many water molecules there are.
Natalie observes these characteristics in the model of an atom. (i) includes positive charge (ii) contains electrons (iii) explains the photoelectric effect (iv) suggests the probable location of electrons Which model is Natalie most likely examining? Bohr model Dalton’s model plum pudding model electron-cloud model
Electron cloud model
Answer:
Electron cloud model
Explanation:
on edge
the high temperatures on venus are caused by the _______.
As sunlight heats Venus' surface, the surface radiates infrared energy that is kept from escaping the planet by dense carbon dioxide atmosphere. This is called the greenhouse effect.
The High tempatures on Venus are caused by the Greenhouse effect
How does density determine whether an object will float?
Answer:
if the object is denser then the substance, it will sink, the less dense the object is then it will float
Explanation:
i got it right in my test. :) have a good day
How are elements organized in the periodic table
1.2 L sample of gas is determined to contain 0.5 moles of nitrogen. At the same temperature and pressure, how many moles of gas would there be in a 20 L sample?
A 20 L sample of the gas contains 8.3 mol N₂.
According to Avogadro’s Law, if p and T are constant
V₂/V₁ = n₂/n₁
n₂ = n₁ × V₂/V₁
___________
n₁ = 0.5 mol; V₁ = 1.2 L
n₂ = ?; V₂ = 20 L
∴n₂ = 0.5 mol × (20 L/1.2 L) = 8.3 mol
which choices are correct based on the images provided
What causes atoms to form covalent bonds?each atom and the shared electronsthe nuclei of the two atomsthe valence electrons of the two atomsenergy levelsprotons and neutronsvalence electrons
In a covalent bond, two atoms are held together by the attraction between each atom and the shared electrons. the number of covalent bonds that an atom can form depends on the number of valence electrons in the atom.
hope dis helped u daddy
Answer: each atom and the shared electrons,
valence electrons
Explanation: A covalent compound is defined as the compound which is formed from the sharing of electrons between the element that are combining together.
These compounds are most likely to be formed when two non-metals combine together. For Examples: [tex]F_2[/tex]
Flourine is an element with tomic number 9 and has 7 valence electrons
[tex]F:9:1s^22s^22p^5[/tex]
Thus for formation of a [tex]F_2[/tex] molecule, they share their valence electrons and attain stable configuration.
A 1.1 kg block of iron at 38 ∘C is rapidly heated by a torch such that 13 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of heat and no loss to the surroundings? If the same amount of heat was quickly transferred to a 890 g pellet of copper at 38 ∘C, what temperature would it reach before losing heat to the surroundings?
Cs, Fe(s)= 0.450 J/g*C
Cs, Cu(s)= 0.385 J/g*C
Answer:- Iron block final temperature is 64 degree C and copper block final temperature is 76 degree C.
Solution:- These problems are based on the formula:
[tex]q=mC_s\Delta T[/tex]
where, q is the heat energy, m is mass, [tex]C_s[/tex] is specific heat and [tex]\Delta T[/tex] is the change in temperature.
mass of iron is given as 1.1 kg. We need to convert it to grams:
[tex]1.1kg(\frac{1000g}{1kg})[/tex] = 1100 g
q is 13 kJ, let's convert it to J:
[tex]13kJ(\frac{1000J}{1kJ})[/tex] = 13000 J
[tex]C_s[/tex] of iron is [tex]\frac{0.450J}{g.^0C}[/tex]
Let's calculate change in temperature for iron.
[tex]\Delta T=\frac{13000J}{1100g*\frac{0.450J}{g.^0C}}[/tex]
[tex]\Delta T=26 ^0C[/tex]
Since, [tex]\Delta T[/tex] = final temperature - initial temperature
26 = final temperature - 38
final temperature = 26 + 38 = 64 degree C
So, The final temperature of iron block would be 64 degree C.
Let's do the same calculations for copper block, it's mass is 890 g and specific heat is [tex]\frac{0.385J}{g.^0C}[/tex] .
[tex]\Delta T=\frac{13000J}{890g*\frac{0.385J}{g.^0C}}[/tex]
[tex]\Delta T=38 ^0C[/tex]
Now, calculations for final temperature:
[tex]\Delta T[/tex] = final temperature - initial temperature
38 = final temperature - 38
final temperature = 38 + 38 = 76 degree C
So, the final temperature of copper block is 76 degree C.
The final temperature of the iron block will be 64.1 °C,
The final temperature of the copper pellet will be 76.0 °C after 13 kJ of heat is transferred to each.
This assumes no heat loss to the surroundings.
To solve this, we use the formula:
q = m * Cs * ΔT
Where q is the heat transferred, m is the mass, Cs is the specific heat capacity, and ΔT is the change in temperature.
For the iron block:
Mass (m) = 1.1 kg = 1100 gSpecific heat capacity (Cs) = 0.450 J/g°CHeat transferred (q) = 13,000 JRearranging the formula to solve for ΔT:
ΔT = q / (m * Cs)
ΔT = 13,000 J / (1100 g * 0.450 J/g°C) ≈ 26.1 °C
The initial temperature is 38 °C, so the final temperature will be:
38 °C + 26.1 °C = 64.1 °C
For the copper pellet:
Mass (m) = 890 gSpecific heat capacity (Cs) = 0.385 J/g°CHeat transferred (q) = 13,000 JSimilarly, solving for ΔT:
ΔT = q / (m * Cs)
ΔT = 13,000 J / (890 g * 0.385 J/g°C) ≈ 38.0 °C
The initial temperature is 38 °C, so the final temperature will be:
38 °C + 38.0 °C = 76.0 °C
list 3 common house hold items and 2 physical properties for each
physical properties for a bar of soap: hardness and color
physical properties for a book: texture and size
physical properties for tooth past: cohesiveness and taste
Answer: The correct answer is:
1. Metal pot: Hardness, fusibility
2. Glass cup: Transparent, resistant
3. Sheet of paper: White, porous
Explanation:
A physical property is one that is based primarily on the structure of the object, substance or matter, which is visible and measurable.
We can define the physical properties of an object through observation and measurement. For example, the physical properties of a wooden cube would be: dense, solid, square, wooden, organic, non-malleable, etc.
How does getting funding from the government affect scientific research?
Explanation:
Funding from the government greatly affects the scientific research as a research can take number of years to complete. During this time period lot of financial support is required as there might be lot of expensive chemicals or substance that the scientist requires for his research.
So, for an individual it is not possible to continue his research without any financial support or huge bank balance.
Also, government can provide better labs and other resources like good equipments, costly or rarely available chemicals or compounds etc.
There are so many diseases for whom there are no medicines. So, with the help of government funding lots of other medicines can be discovered for the benefit of people and development of nation.
Answer:
Scientists have to follow governmental rules made to protect people.
Explanation:
What do elements in the first two columns of the periodic table have in common
All of them are very reactive.
Difference between a row (“period”) & a column (“group”) on the periodic table and examples.
The rows are the one line of elements that goes from left to right horizontally. A column is a line of elements that goes vertically.
What is the process that moves sediments called?
Erosion is the process in which rocks are transported from one location to another. Not to be confused with weathering.
In the chemical formula O2, what does the number 2 mean?
The Big Bang really happened. But within milliseconds, the universe expanded or inflated so rapidly that the universe is flat and uniform
Final answer:
The inflationary model proposes that the universe underwent rapid expansion, known as inflation, shortly after the Big Bang, explaining its flatness and uniformity. The model accounts for the uniform CMB temperature and expounds on the formation of structures within the early universe, including galaxies from concentrated regions of matter.
Explanation:
The Inflationary Hypothesis
Physicists have developed a theory known as the inflationary model to explain certain characteristics of the universe, such as its flatness and uniformity. This hypothesis suggests that shortly after the Big Bang, before the emission of the Cosmic Microwave Background (CMB), the universe underwent a period of incredibly rapid expansion. This period, known as inflation, lasted between about 10-35 and 10-33 seconds after the Big Bang, during which the scale of the universe increased exponentially by a factor of about 1050. These inflationary models adjust for the uniform temperature observed across the CMB and the density of the universe being so close to the critical density. They also help explain how the early hot, dense state of the universe resulted in the large-scale structures we see today, where the concentrated matter eventually formed galaxies.
Formation of Structure in the Early Universe
Theorists suggest that in the early universe, a uniform hot 'soup' of particles vibrated, much like sound waves. These vibrations could have created regions of higher density, which, upon cooling, resulted in the 'frozen in' concentrations of matter from which galaxies eventually formed. The Big Bang model is supported by the isotropic nature and the expansion of the universe, along with CMB evidence. Overall, the model of an inflationary universe fills in the gaps left by the traditional Big Bang model and provides a unified picture of how the early universe evolved, guided by the principles of grand unified theories (GUTs).
Please help me, will mark brain whoever answers the fastest!
Page 1
1: The grass
2: The grasshopper
3: The frog
4: The snake
5: The eagle
Page: 2
The answer is the 2nd one
Page: 3
The owl would because its at the end it would have almost no more sun energy left in whatever it eats.
Hope This Helps :)
Grass, Grass Hopper, Frog, Snake, then Hawk.
For the food web question, it would be the third option because most organisms eat more than one thing.
The original source of energy in most ecosystems is the sun.
The owl would receive the least amount of energy because each level of the food chain only gains 10% of the organisms energy.
Which element is likely to be the most reactive?
1bromine
2chlorine
3fluorine
4iodine
Answer:
c fluorine
Explanation:
identify if its noble gass or longhand
Iron (Fe): [Ar]4s23d6
i will say ar that all i got
NOBLE GAS IS THE ANSWER
Consider the reaction. At equilibrium, the concentrations of the different species are as follows. [NH3] = 0.105 M [N2] = 1.1 M [H2] = 1.50 M What is the equilibrium constant for the reaction at this temperature?
Hey there!:
The reaction is as follows:
N2(g)+ 3 H2(g) ⇌ 2 NH3(g)
At equilibrium, the concentrations of the different species are as follows.:
[NH3] = 0.105 M
[N2] = 1.1 M
[H2] = 1.50 M
The equilibrium constant for the reaction is given as follows:
Keq = [NH3]² / [N2] [H2]³
Keq = (0.105)² / [1.1] [1.50]³
Keq = 0.00296 or 0.0030
The equilibrium constant for the reaction at this temperature is 0.0030.
Hope that helps!
Answer:
A
Explanation:
Because of surface tension, a liquid _____.
resists flowing
forms droplets
forms a crystalline solid
takes the shape of its container
Answer:
The correct answer is forms droplets
how many atoms of chromium are in 0.86 mol of potassium chromate (K2CrO4)?
Atoms of Cr in 0.86 mol of K2CrO4 = 0.86 × 6.02*10^23 = 5.177 * 10^23 atoms.
Explanation:One mol of K2CrO4 contains 6.02*10^23 molecules of K2CrO4.One K2CrO4 contains 1 atom of Cr.So 0.86 mol of K2CrO4 contain 0.86 * 6.02*10^23.Which is equal to 5.177 * 10^23 atoms.To find the number of atoms of chromium in 0.86 mol of potassium chromate, you multiply the moles by Avogadro's number, resulting in approximately 5.18 x 10²³ Cr atoms.
To calculate how many atoms of chromium are in 0.86 mol of potassium chromate (K₂CrO₄), we have to understand the composition of the compound potassium chromate. Potassium chromate consists of two potassium (K) ions, one chromium (Cr) atom, and four oxygen (O) atoms. Since there is one Cr atom in each formula unit of K₂CrO₄, the number of Cr atoms will be equal to the number of moles of K₂CrO₄ given.
To find the number of Cr atoms, we use Avogadro's number, which states there are approximately 6.022 x 10²³atoms in one mole of any substance. Therefore, we calculate the number of atoms of chromium by multiplying the number of moles of K₂CrO₄ by Avogadro's number:
Number of molecules = Number of moles × Avogadro’s number
Number of molecules = 0.86moles×(6.022 × 10²³ molecules/mol)
Number of molecules ≈ 5.18 × 10²³ molecules
can u give me uses of sodium
Ok. Sodium is used in the everyday things we eat or known as naCI. It is also used a reactor for nuclear things. It is also added to snow to de-ice the roads in winter.
As a skateboarder moves down hill some of the energy is
what is the difference between a regular and an irregular solid?
Which hydrocarbon is an unsaturated hydrocarbon?
A.
2-methylheptane
B.
3-ethylpentane
C.
1-hexene
D.
cyclopentane
[tex]\boxed{\text{C. 1-hexene}}[/tex] is an unsaturated hydrocarbon.
Further Explanation:
Hydrocarbons:
The organic compounds consisting of hydrogen and carbon atoms alone are called hydrocarbons. Such compounds can be aromatic, aliphatic, linear, branched or cyclic. Aromatic hydrocarbons, alkanes, cycloalkanes are different types of hydrocarbons.
Types of hydrocarbons:
(I) Saturated hydrocarbons
These are variety of hydrocarbons that contain only single bonds in them and are the simplest hydrocarbons. Saturated hydrocarbons have the general formula of [tex]\text{C}_{\text{n}}\text{H}_{\text{2n+2}}[/tex] in which n indicates the number of carbon atoms present in it. Examples of saturated hydrocarbons are methane, ethane, butane and propane.
(II) Unsaturated hydrocarbons
The type of hydrocarbons that has multiple bonds in them are known as unsaturated hydrocarbons. Multiple bonds can be either double or triple bonds. Alkenes are those unsaturated hydrocarbons consisting of double bonds in them. For example, ethene, propene, and pentene are alkenes. Alkynes refer to unsaturated hydrocarbons with triple bonds in them. Ethyne and propyne are examples of alkynes. Alkenes are represented by general formula, [tex]\text{C}_{\text{n}}\text{H}_{\text{2n}}[/tex] while alkynes are represented by general formula of [tex]\text{C}_{\text{n}}\text{H}_{\text{2n-2}}[/tex] .
Alkanes use ‘ane’ as suffix in their naming. Alkenes use ‘ene’ as suffix while ‘yne’ is used in naming of alkynes.
Since 2-methylheptane, 3-ethylpentane and cyclopentane have suffix ‘ane’ in their names and are tered as saturated class of hydrocarbons called alkanes. But 1-hexene has suffix ‘ene’, indicating that it belongs to unsaturated hydrocarbons called alkenes. Therefore 1-hexene is an unsaturated hydrocarbon.
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Hydrocarbons
Keywords: hydrocarbons, saturated, unsaturated, alkene, alkyne, CnH2n+2, CnH2n, CnH2n-2, double bonds, triple bonds, single bonds, 1-hexene, cyclopentane, 2-methylheptane, 3-ethylpentane.
The compound which is an unsaturated hydrocarbon is 1-hexene.The correct option is C.
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.
Organic compounds have single,double or triple bonds due to which the single organic compounds are saturated while the other two are unsaturated hydrocarbons with suffix '-ene' or '-yne'.
Thus, the correct option is C.
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