Read the list of elements given below.
F, Cl, Br, I
Which of the following about the elements is true?
A. All of them are highly reactive metals
B. All of them are highly reactive nonmetals
C. F and Cl are reactive nonmetals and Br and I are highly reactive metals
D. F and Cl are reactive metals and Br and I are highly reactive nonmetals
Answers
It is, in fact, true that the elements given (known as halogens) are nonmetals that also happen to be highly reactive. So, B would be the correct answer.
Related Questions
The diagram models a change in some sample of matter.
Before
00
After
What change is illustrated in the diagram?
atoms that formed molecules
molecules that formed atoms
atoms that formed elements
molecules that formed elements
Answers
The change illustrated in the diagram is atoms that formed molecules.
As we can see in the diagram first before the change atoms are free they are not in a combined state but after the reaction, two atoms are combined to form a molecule.
An atom can be defined as the smallest unit of matter that forms a chemical element.
A molecule can be defined as a group of two or more atoms held together by attractive forces known as chemical bonds.
As we can see in the diagram two atoms are combining together to form a molecule.
Hence, we can say that atoms are forming molecules.
The complete question is
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There is energy releasing and energy absorbing when the atoms combined to formed the molecules and the molecules are combined to formed an elements.
When the atoms formed the molecules the physical and chemical properties are changed.A single atom is neutral entities that is made up of electrons and protons but the molecules are made up of atoms by forming ionic bonds, hydrogen bonds or covalent bond.In this process of formation of molecules is called anabolic process in which energy is required to formed the molecules.And the process is the exothermic process.But if the process is reversed than amount of energy is released to break the molecules into atoms.We need to break the bonds.When the molecules are combined to formed and elements then might be different molecule are combined to formed an elements or same molecules are combined to formed an elements.this is called combination reaction.The chemical reactions involved combination reactions and decomposition reactions.
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What is like the mitochondria?
O Excretory system
Digestive system
O Nervous system
O Skeletal System
Answers
Answer:
digestive system
.
Explanation:
OK this is a serious question now XD A) NAME ONE WAY THAT ORGANISMS USE CARBON= ? B) NAME THE ONE PROCESS WHICH DECREASES CO2 IN THE ATMOSPHERE= ? C) NAME THE ONE PROCESS WHICH INCREASES CO2 IN THE ATMOSPHERE= ?
Answers
Answer:
A) anaerobic respiration
B) photosynthesis
C) breathing
which labeled structure is in charge of editing and sorting incoming sensory stimuli, and controlling information entry into the cerebral cortex?
Answers
Thalamus is in the charge of editing and sorting incoming sensory stimuli and controlling information entry into the cerebral cortex.
Thalamus is our body’s information relay station. All information from your body’s senses except smell must be processed through your thalamus before being sent to your brain’s cerebral cortex for interpretation. Your thalamus also plays a role in sleep, wakefulness, consciousness, learning and memory. Sensory impulses travel through nerve fibers from your body through brain structures to your thalamus. Specialized areas of your thalamus called nuclei, are each responsible for processing different sensory or motor impulses received from your body and then sending the selected information through nerve fibers to the related area of your cerebral cortex for interpretation.
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Give the coefficients to balance the following equation:
Answers
Explanation:
Ag gives +
So the answer is 1,1,1,1
. the density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (v). density
Answers
Density is intensive because it is the ratio of two extensive properties that is mass to volume.
What is Density ?Density is defined as mass per unit volume. S.I unit if density is kg/m³.
It is expressed as
Density = \(\frac{\text{Mass}}{\text{Volume}}\) or \(d = \frac{m}{V}\)
What is Intensive Property ?Intensive property is the property which does not depend on the size of the system. Intensive property can be easily identified. Intensive property is the independent property. The size does not change in this.
Example of intensive property are Density, Freezing point, melting point, colour, Lustre, etc.
What is Extensive property ?Extensive property is the property which depend on the substance. Extensive property cannot be easily identified.
Example of extensive property length, weight, volume, mass etc.
Thus from the above conclusion we can say that Density is intensive because it is the ratio of two extensive properties that is mass to volume.
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Disclaimer: The given question is incomplete on the portal. Here is the complete question.
Question: The density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (v)
density = \(\frac{\text{Mass}}{\text{Volume}}\) or \(d = \frac{m}{V}\)
Considering that mass and volume are both extensive properties, explain why their ratio, density is intensive.
2Fe2O3 + 3C 4Fe + 300,
When 9.20 moles of carbon dioxide are produced from the reaction above, how many moles of Iron(III) Oxide must have been present before the reaction took place?
Answers
Answer:
3.1 moles of Iron(III) Oxide
Explanation:
The equation of the reduction of iron III oxide using carbon is shown;
Fe2O3 + 3CO → 2Fe + 3CO2
From the reaction equation;
1 mole of Iron(III) Oxide yielded 3 moles of carbon dioxide
x moles of Iron(III) Oxide will yield 9.20 moles of carbon dioxide
x = 9.2 moles * 1 mole/3 moles
x = 3.1 moles of Iron(III) Oxide
Question 4(Multiple Choice Worth 2 points)
(01.05 LC)
What property of matter takes up space?
O Mass
O Temperature
O Volume
O Weight
Answers
Answer:
Its not mass
Explanation:
X Mass out.
3.4 g of AGno3 are dissolved to make a 200 ml solution what is the molarity
Answers
Answer:
hehe you might think im crazy but this answer makes no sEnSe
Explanation:
explain how you could use ir spectroscopy to differentiate between compounds f and g. (b) explain how you could use ir spectroscopy to differentiate between compounds d and e. (c) if you wanted to distinguish between compounds b and f, would it be more suitable to use ir spectroscopy or mass spectrometry? explain. (d) would mass spectrometry be helpful for distinguishing between compounds a and d? explain.
Answers
Since these two substances are both alcohols, IR spectroscopy cannot be used to separate them.
These two substances may be distinguished from one another using mass spectrometry because they have various molecular weights.The IR spectroscopy theory is based on the idea that molecules have a tendency to absorb particular light frequencies that are unique to the corresponding structure of the molecules.The electromagnetic spectrum's infrared section, which includes light with a longer wavelength and lower frequency than visible light, is the subject of infrared spectroscopy (IR spectroscopy).
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Which is the best description of Darwin’s theory of evolution?
A.
It is the same as natural selection.
B.
It is based on the same ideas as Lamarck’s acquired characteristics.
C.
It states that all species evolve over time through natural selection.
D.
It describes DNA passed from parent to offspring as the driving force of evolution.
Answers
Answer:
d
Explanation:
stop answering people questions and not actually helping them typing random stuff like i just did here
It describes DNA passed from parent to offspring as the driving force of evolution.
What is evolution?
The basic idea of biological evolution is that populations and species of organisms change over time. Today, when we think of evolution, we are likely to link this idea with one specific person: the British naturalist Charles Darwin.In the 1850s, Darwin wrote an influential and controversial book called On the Origin of Species. In it, he proposed that species evolve (or, as he put it, undergo "descent with modification") and that all living things can trace their descent to a common ancestor.Darwin defined evolution as "descent with modification," the idea that species change over time, give rise to new species and share a common ancestor. The mechanism that Darwin proposed for evolution is natural selection.
therefore option D is the correct answer.
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what more accurate model of the atom emerged from Albert Einstein's contributions and quantum mechanics
Answers
Answer:
Einstein also in 1905 mathematically proved the existence of atoms, and thus helped revolutionize all the sciences through the use of statistics and probability. Atomic theory says that any liquid is made up of molecules (invisible in 1905)
Explanation:
Answer:
The discoveries of Albert Einstein led to development in the understanding of the atom through the study of quantum mechanics and the electron cloud. In this model, there is still a nucleus with protons and neutrons. But unlike the Bohr model, the electrons exist in a cloud outside the nucleus, much like the fruit around the pit of a peach.
Explanation:
2. The concentration of HCI in a solution is 1 x 10^-2 mol/L. What would the pH
of the solution be?
(Hint: use pH = -log[H3O+])
A. 2
B. 3
C. 4
D. 5
Answers
A. 2
B. 3
C. 4
D. 5A. 2
B. 3
C. 4
D. 5A. 2
B. 3
C. 4
D. 5
A certain crystalline substance that has a low melting point does not conduct electricity in solution or when melted. This substance is likely to be (A) a covalent network solid (B) a metallic solid (C) a polymer (D) an ionic solid (E) a molecular solid
Answers
The main answer to your question is (E) a molecular solid.
A molecular solid is composed of individual molecules held together by intermolecular forces, such as London dispersion forces, dipole-dipole forces, and hydrogen bonding.
These intermolecular forces are not strong enough to allow the substance to conduct electricity in solution or when melted.
Additionally, the low melting point of the substance indicates that the intermolecular forces holding the molecules together are relatively weak.
Summary: The substance is likely a molecular solid, which does not conduct electricity in solution or when melted due to weak intermolecular forces between individual molecules.
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"Analyze the graph, with a detailed explanation tell me why you chose your answer.
The answer to the given problem is ___. I chose this answer because, after analyzing the graph _______. "
Answers
According to the information we can infer that the relationship between time and distance is constant, this object moves at a speed of 2 meters per minute (option B).
How to identify the average speed of this object?To identify the average speed of this object we must analyze the information from the graph. In this case, the speed shown is that the object moves 10 meters for every 5 minutes. According to the above, if we want to know how much distance it travels per minute, we must divide the distance into time as shown below:
10 / 5 = 2According to the above, the object moves 2 meters for every minute. So the correct choice would be B. 2 meters/ minute.
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3NaOH(aq) +K3PO4 (aq) no change yes 9. 2NaOH(aq)+K2CO3(aq) no change 10. 2NaOH(aq) + H₂SO4(aq) no visable change, no test tube got warm AgNO3(aq) + HCl(aq) white ppt BAgNO3(aq)+3PO4(a)tan ppt 11. 8. 13. 2 AgNO3(aq) +K2CO3 white ppt 14./2CH3COOH(aq)+K₂ Calgas bubbles yes yes yes yes Note: Write molecular, total ionic, and net ionic equations for the above reactions on separate sheets of paper and turn those in with your data sheets. You will receive a zero for Experiment 10 if you do not include the pages with the equations written out. 107 As the instructions on the data sheet indicate, on separate pages (probably two or three) you need to write the molecular, total ionic, and net ionic equations for all the reactions that occurred. Make sure to include physical states and balance the equations appropriately. If no reaction occurs for a particular combination, you still need to indicate the formulas and states of the reactants. However, in these cases the reaction arrow will be followed by "N.R." If no reaction occurs, you do not need to balance the equation for that reaction or write anything for the total ionic or net ionic equations.
Answers
The given question is about writing molecular, total ionic, and net ionic equations for different chemical reactions. The chemical equations and their details are given as follows:
Reaction 1: 3NaOH(aq) + K3PO4(aq)
Total Ionic Equation: 3Na⁺(aq) + 3OH⁻(aq) + 3K⁺(aq) + PO₄³⁻(aq) → 3K⁺(aq) + 3Na⁺(aq) + 3OH⁻(aq) + PO₄³⁻(aq)
Net Ionic Equation: No Change
Reaction 2: 2NaOH(aq) + K2CO3(aq)
Total Ionic Equation: 2Na⁺(aq) + 2OH⁻(aq) + K⁺(aq) + CO₃²⁻(aq) → 2Na⁺(aq) + 2OH⁻(aq) + K⁺(aq) + CO₃²⁻(aq)
Net Ionic Equation: No Change
Reaction 3: 2NaOH(aq) + H₂SO₄(aq)
Total Ionic Equation: 2Na⁺(aq) + 2OH⁻(aq) + 2H⁺(aq) + SO₄²⁻(aq) → 2Na⁺(aq) + 2H₂O(l) + SO₄²⁻(aq)
Net Ionic Equation: No visible Change, No test tube got warm
Reaction 4: AgNO₃(aq) + HCl(aq)
Total Ionic Equation: Ag⁺(aq) + NO₃⁻(aq) + H⁺(aq) + Cl⁻(aq) → AgCl(s) + NO₃⁻(aq) + H⁺(aq)
Net Ionic Equation: Ag⁺(aq) + Cl⁻(aq) → AgCl(s)
Reaction 5: BAgNO₃(aq) + 3PO₄(a)
Total Ionic Equation: B⁺(aq) + Ag⁺(aq) + NO₃⁻(aq) + 3PO₄³⁻(aq) → Ag₃PO₄(s) + NO₃⁻(aq) + BPO₄(s)
Net Ionic Equation: 3Ag⁺(aq) + PO₄³⁻(aq) → Ag₃PO₄(s)
Reaction 6: 2AgNO₃(aq) + K₂CO₃(aq)
Total Ionic Equation: 2Ag⁺(aq) + NO₃⁻(aq) + 2K⁺(aq) + CO₃²⁻(aq) → Ag₂CO₃(s) + NO₃⁻(aq) + 2K⁺(aq)
Net Ionic Equation: 2Ag⁺(aq) + CO₃²⁻(aq) → Ag₂CO₃(s)
Reaction 7: 2CH3COOH(aq) + K₂Calgas bubbles
Total Ionic Equation: 2CH3COOH(aq) + 2K⁺(aq) → 2CH3COO⁻(aq) + H₂(g) + 2K⁺(aq)
Net Ionic Equation: 2H⁺(aq) + 2CH3COO⁻(aq) → 2CH3COOH(aq) + H₂(g)
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How do we use this percent composition in our daily lives?
Answers
Answer: you could use it for sceinstest stuff hom someting broke down
Explanation:
What is the atomic number of Gold
Answers
a solution is prepared by dissolving 99.7 g of csi in enough water to form 895 ml of solution. calculate the mass % of the solution if the density of the solution is 1.06 g/ml.a solution is prepared by dissolving 99.7 g of csi in enough water to form 895 ml of solution. calculate the mass % of the solution if the density of the solution is 1.06 g/ml.12.7.5%9.4.9.3%
Answers
The mass percent of the solution is approximately 10.51%.
To calculate the mass percent of the solution, we need to determine the total mass of the solution.
The mass of the solution can be calculated using the density and volume of the solution:
Mass of the solution = Density × Volume
Mass of the solution = 1.06 g/ml × 895 ml
Mass of the solution = 948.7 g
The mass percent of the solution can be calculated by dividing the mass of the solute (CSI) by the mass of the solution and multiplying by 100:
Mass percent = (Mass of CSI / Mass of the solution) × 100
Mass percent = (99.7 g / 948.7 g) × 100
Mass percent ≈ 10.51%
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how many miles per second can sound move???
Answers
Answer:
Sound can move at approximately 0.21313 miles/second.
Explanation:
How does an emerging idea differ from scientific consensus? Which best describes emerging scientific ideas?
Answers
Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.
Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.
They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.
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Consider the equation:S+3O2 → SO3
Is this equation balanced? Why or why not?
I will give brainlyiest to whoever writes the most detailed answer.!!!
Answers
On the left side of the equation, there is 1 atom of S and 6 atoms of O (3 O$_2$ molecules).
On the right side of the equation, there is 1 atom of S and 3 atoms of O (1 SO$_3$ molecule).
Therefore, to balance the equation, we need to add a coefficient of 2 in front of SO$_3$ to get:
S + 3O$_2$ $\rightarrow$ 2SO$_3$
Now, there are 2 atoms of S and 6 atoms of O on both sides of the equation.
__________________________________
S + 3O2 → SO3 = S + 3O2 → 2SO3= 2S + 302 → 2SO3= uS + v302 → wSO3= u = w = 6v = 3w= 6v/6 = 3w/6= v = w/2 = u = w= 2S + 3O2 → 3SO2No, The Equation Is Not Balanced.___________________________________
what are 5 physical changes in matter
Answers
Answer:
cutting, bending, dissolving, freezing, and boiling
Explanation:
A physical change is a change in one or more physical properties of matter without any change in chemical properties. In other words, matter doesn't change into a different substance in a physical change. Examples of physical change include but are not limited to, from solid to liquid or from liquid to gas are also physical changes.
Why can't molecules have thermal energy?
Answers
Answer:
Thermal Energy, also known as random or internal Kinetic Energy, due to the random motion of molecules in a system. Kinetic Energy is seen in three forms: vibrational, rotational, and translational. Vibrational is the energy caused by an object or molecule moving in a vibrating motion, rotational is the energy caused by rotating motion, and translational is the energy caused by the movement of one molecule to to another location.
Select the dominant intermolecular force between acetone molecules.
a. hydrogen bonding
b. London dispersion forces
c. ion-dipole forces
d. dipole-dipole forces
Answers
The dominant intermolecular forces between the acetone molecules (CH3COCH3) is dipole-dipole forces is. D
What is intermolecular force between acetone molecules?Acetone is a dipolar molecule because of the positive and negative charges formed by the carbonyl group present in the compound. Therefore the dominant intermolecular forces between the acetone molecules are dipole-dipole interactions.
Therefore the dominant intermolecular forces between the acetone molecules is dipole-dipole interactions.
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9. Identify which properties of each of the following elements make them ideal for their uses. KIU A (a) copper and aluminum for pots and pans (b) silver and gold for jewellery (C) argon in double-glazed windows for homes
Answers
Answer:
Each element has its own unique properties. Each contains a different number of protons and neutrons, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains. The mass number is the number of protons plus the number of neutrons of that element. Therefore, it is possible to determine the number of neutrons by subtracting the atomic number from the mass number.
Explanation:
Hope that helps you!
Each element has is own chemical and physical properties which make them unique and ideal for there uses.
What are properties?
Properties are defined as a characteristics of a particular substance that can observed in a chemical reaction.
There are mainly two types of properties
Chemical propertiesPhysical propertiesBoth the chemical and physical properties are different for each elements and compounds.
Each elements has different number of protons and neutrons that contains its own atomic number and atomic mass
Thus, each element has is own chemical and physical properties which make them unique and ideal for there uses.
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The density of gold is 19. 3 g/cm3. What is the volume of a 13 g gold nugget? (Density: D = ). 25 cm3. 67 cm3 1. 48 cm3 2. 50 cm3.
Answers
Answer:
0.67 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
\(volume = \frac{mass}{density} \\\)
From the question
mass = 13 g
density = 19.3 g/cm³
We have
\(volume = \frac{13}{19.3} \\ = 0.673575...\)
We have the final answer as
0.67 cm³Hope this helps you
What mass (in grams) of na2s2o3 is needed to dissolve 0. 44 g of agbr in a solution volume of 1. 0 l, given that ksp for agbr is 3. 3×10−13 and kf for [ag(s2o3)2]3− is 4. 7×1013?
Answers
the mass of Sodium thiosulfate needed to dissolve 0.44 g of AgBr in a 1.0 L solution is approximately 1.08×10^−4 g. To find the mass of Na2S2O3 needed to dissolve 0.44 g of AgBr in a 1.0 L solution, we need to consider the solubility product constant (Ksp) for AgBr.
Here's how we can solve this problem step by step Write the balanced equation for the dissolution of AgBr:
AgBr(s) ↔ Ag+(aq) + Br-(aq) this calculation assumes that AgBr is completely dissolved, which may not be the case in reality.
Set up the equilibrium expression for the dissolution of AgBr Ksp = [Ag+][Br-] Since AgBr is insoluble, we can assume that the concentration of Ag+ and Br- is equal to x (the molar solubility of AgBr). Substitute the molar solubility (x) into the equilibrium expression Ksp = x * x
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What are the physical and chemical properties of compounds most influenced by?
Answers
As the names suggest, a physical change affects a substance's physical properties, and a chemical change affects its chemical properties. Many physical changes are reversible (such as heating and cooling), whereas chemical changes are often irreversible or only reversible with an additional chemical change.
(hope this helps ^^)
HELP FAST PLEASE !!!!
Answers
Explanation:
See the table above. Periods at the side, metals at the top, non metals to the right, group to the right of that
