Answer:
for a effective wind farm you would need wind turbines a windy area a rotation powered generator and something to use it on
Explanation:
___ manifested as instantaneous charge difference is due to molecular interactions
Answer:
Dispersion forces are manifested as instantaneous charge differences due to molecular interactions
Explanation:
3. the atomic radii of mg2 and f− ions are 0.072 and 0.133 nm, respectively. ex 2.2 (a) calculate the force of attraction between these two ions at their equilibrium interionic separation (i.e., when the ions just touch one another).
The force of attraction between these two ions at their equilibrium interionic separation is F = -1.10 x 10⁻⁸.
What is the force of attraction?The force of attraction is when the atoms of two molecules attract one another.
To calculate the attraction (F), we will use Coulomb's Law:
F = k Q1Q2 / r2
where
Q₁ and Q₂ are the fees on the ions,
r is that the distance between them, and
k = the Coulomb constant
Given the Q₁ = 2+
Q₂ = 1-
r₊ = 0.072 nm
r₋ = 0.133 nm
k = 8.988 × 10⁹ N· m²C⁻²
Q₁ = (+2) × 1.602 × 10⁻¹⁹ C
= +3.204 × 10⁻¹⁹ C
Q₂ = (-1) × 1.602 × 10⁻¹⁹ C
= -1.602 × 10⁻¹⁹ C
r = r₊ + r₋
0.072 nm + 0.133 nm = 0.205 nm
= 0.205 × 10⁻⁹ m
F = -1.10 x 10⁻⁸
Thus, the force of attraction is F = -1.10 x 10⁻⁸.
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Classify the following as a solution, suspension or colloid
(a) Brine
(b) milk
(c) sand and water
(d) soda
(e) air
(f) smoke
(g) chalk and water
Answer:
Solution - (a) Brine . Suspension - (c) sand and water, (g) chalk and water Colloid - (e) air, (f) smoke , (d) soda , (b) milk
Explanation:
A solution is an homogeneous mixture of two or more compounds.
A suspension is a heterogeneous mixture of two or more compounds while a colloid is a homogeneous mixture of two or more compounds with suspended particles which do not settle.
So, under these definitions, the classifications are as follows-
Solution - (a) Brine .
Suspension - (c) sand and water, (g) chalk and water
Colloid - (e) air, (f) smoke , (d) soda , (b) milk
What would happen if Jupiter gravitational pull was increased or reduced?
Answer:
Jupiter would have the strongest gravitational pull on a satellite.
Gravity is directly proportional to mass.
Jupiter is the most massive, so it will have a stronger gravitational pull.
Explanation:
An aqueous solution of potassium iodide turns from colourless to brown.
What happens to the iodide ions?
A.)lodide ions are oxidised due to gain of electrons
B.)lodide ions are oxidised due to loss of electrons.
C.)lodide ions are reduced due to loss of electrons.
D.)lodide ions are reduced due to gain of electrons.
Answer:B
Explanation:
It’s pretty obvious lol
Can someone please help me with number 10
please help me figure out which has 3 significant figures
Answer:
D
Explanation:
0 is between 6 and 2 so it's also a significant figure
How did conservatism affect the nationalist movements in Europe?
A.
It promoted the overthrow of absolute monarchies.
B.
It forced nationalist leaders to adopt socialism.
C.
It delayed or extended nationalist struggles.
D.
It emphasized the rights of individuals over nations.
Answer:
The answer is C. (It delayed or extended nationalist struggles.)
Explanation:
Hope this helps!
what is universal indicator solution used for
For the reaction N2 + 3H2 - 2NH3, how many moles of nitrogen are required to produce 9.58 mol of ammonia?
Answer:
3.193 mol
Explanation:
The reaction is
[tex]N_2+3H_2\rightarrow 2NH_3[/tex]
We use the stoichiometry in order to find the moles of nitrogen required.
[tex]9.58\ \text{mol of }NH_3\times \dfrac{1\ \text{mol of }N_2}{2\ \text{mol of }NH_3}[/tex]
[tex]=3.193\ \text{mol of }N_1[/tex]
The amount of nitrogen required is 3.193 mol to produce 9.58 mol of ammonia.
What is the Cp (in J/gC) of a material if a 50 gram sample of it at 100 C is placed into 500 grams of water at
20 C and the water temp rises to 23 C and the material temp goes down to 23 C?
Answer:
The specific heat capacity of this material is approximately [tex]1.6\; \rm J\cdot g^{-1} \cdot {\left(^\circ C\right)}^{-1}[/tex].
(Assume that there is no energy loss. Assume that the specific heat capacity of water is [tex]4.182\; \rm J \cdot g^{-1} \cdot {\left(^\circ C\right)}^{-1}[/tex].)
Explanation:
Let [tex]c[/tex] denote the specific heat capacity of a material. Consider a sample of that material with mass [tex]m[/tex]. If the temperature of that objects changes by [tex]\Delta T[/tex], the corresponding energy change would be [tex]Q =c \cdot m \cdot \Delta T[/tex].
Start by finding the amount of energy that water has gained from the [tex]50\; \rm g[/tex] sample.
Specific heat capacity of water: [tex]c(\text{water}) \approx 4.182\; \rm J \cdot g^{-1} \cdot \left(^\circ C\right)^{-1}[/tex].Mass of water: [tex]m(\text{water}) = 500\; \rm g[/tex].Temperature change: [tex]\begin{aligned}\Delta T(\text{water}) &= T(\text{final}) - T(\text{initial}) \\ &= 23\; \rm ^\circ C - 20\; \rm ^\circ C = 3\; \rm ^\circ C\end{aligned}[/tex].That [tex]500\; \rm g[/tex] of water would have gained:
[tex]\begin{aligned} & Q(\text{water}) \\ &= c(\text{water}) \cdot m(\text{water}) \cdot \Delta T (\text{water}) \\ &\approx 4.182\; \rm J \cdot g^{-1} \cdot \left(^\circ C\right)^{-1} \times 500\; \rm g \times 3\; \rm ^\circ C \\ &\approx 6.27\times 10^{3}\; \rm J \end{aligned}[/tex].
Assume that the [tex]50\; \rm g[/tex] sample and the [tex]500\; \rm g[/tex] of water were insulated from the surroundings. The energy that water gained would be exactly the same as the energy that the [tex]50\; \rm g\![/tex] sample had released through cooling.
In other words, the [tex]50\; \rm g[/tex] sample has released approximately [tex]6.27 \times 10^{3}\; \rm J[/tex] of energy as it is cooled from [tex]100\; \rm ^\circ C[/tex] to [tex]23\; \rm ^\circ C[/tex].
Energy change: [tex]Q(\text{sample}) \approx -6.27 \times 10^{3}\; \rm J[/tex] (negative because this sample has lost energy through cooling.)Mass of sample: [tex]m = 50\; \rm g[/tex].Temperature change: [tex]\begin{aligned}\Delta T(\text{sample}) &= T(\text{final}) - T(\text{initial}) \\ &= 23\; \rm ^\circ C - 100\; \rm ^\circ C = -77\; \rm ^\circ C\end{aligned}[/tex].Rearrange the equation [tex]Q = c \cdot m \cdot \Delta T[/tex] to find an expression for specific heat capacity, [tex]c[/tex]:
[tex]\begin{aligned}c = \frac{Q}{m \cdot \Delta T}\end{aligned}[/tex].
Apply this expression to find the specific heat capacity of the sample:
[tex]\begin{aligned}c(\text{sample}) &= \frac{Q(\text{sample})}{m(\text{sample}) \cdot \Delta T(\text{sample})} \\ &\approx \frac{-6.27\times 10^{3}\; \rm J}{50\; \rm g \times \left(-77\; \rm ^\circ C\right)} \approx 1.6\; \rm J \cdot g^{-1} \cdot {\left(^\circ C\right)}^{-1}\end{aligned}[/tex].
CO
O 2
NaCl
H 2
MgO
N 2
Cl 2
K 2 O
LiF
CaO
How many of the above contain ionic bonding in them. Write their formulas below. Write one major
reason that how do you come to know that your given answers contain ionic bonding in them
Answer:
1) The number of the listed compounds that have ionic bonds between them are 5 compounds
2) Their formulas showing their charges within the compounds are;
NaCl ↔ Na⁺+Cl⁻
MgO ↔ Mg²⁺+O²⁻
K₂O ↔ 2K⁺+O²⁻
LiF ↔Li⁺+F⁻
CaO ↔ Ca⁺+O²⁻
3) The major reason they were selected is because they are compounds formed by the combination of a metal and a nonmetal
Explanation:
1) An ionic bond involves the transfer of an atoms valence to another atom, such that the ions formed by the ionic chemical bond will be oppositely charged
Therefore, metals, which are elements that mainly have a few electrons in their outermost shell, loses their valence electrons and become positively charged, while non metals, which require a few electrons to complete the stable octet electronic configuration, receive the electrons from the metallic atoms and become negatively charged
Therefore, the compounds formed between a metal and a nonmetal in the list are the the compounds containing ionic bonds, including
NaCl, MgO, K₂O, LiF, and CaO
Therefore, 5 compounds contain ionic bonds between them;
2) Their formulas are;
NaCl, MgO, K₂O, LiF, and CaO
3) The major reason that the chosen compounds contain ionic bonding between them is because they involve the combination of a metal and a nonmetal as follows;
a) NaCl → Na⁺ (metal ion) + Cl⁻(nonmetal ion)
b) MgO → Mg²⁺ (metal ion) + O²⁻(nonmetal ion)
c) K₂O → 2K⁺ (metal ion) + O²⁻(nonmetal ion)
d) LiF → Li⁺ (metal ion) + F⁻(nonmetal ion)
e) CaO → Ca⁺ (metal ion) + O²⁻(nonmetal ion)
Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).
1.20 moles of Silicon are added to 1.00 moles of Nitrogen gas.
(5 Points) Balance the equation and indicate the phases.
Si (___) + N2 (___) → Si3N4 (___)
(5 Points) What is the limiting reactant? You must show your work.
I need help urgently see where it says text here answers the questions PLS I NEED AN 100%
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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I have no idea what is what
Answer:
The first one would be C. The second one would be E. The third one would be B. The fourth one would be D. Lastly, the fifth one would be A.
5. How many moles of calcium atoms are in each mole of calcium carbonate? (1 point)
Answer:
One mole of calcium is present in one mole of calcium carbonate
Explanation:
Because its formula is CaCO3
Ca contains 2+ charge and CO3 contains 2- charge
What does the following nuclear symbol reveal about the particle?
Answer:
Photo?
Explanation:
What THREE organisms use photosynthesis?
Answer:
Plants, bacteria, and algae
Explanation: Plants are known to gather food from the sun, algae is a type of plant, and bacteria gather food from the sun while they are in the air.
A student made lemon drop candy by melting sugar, water, and lemon flavoring in a sauce pan until the mixture was at a very high temperature. Next, the student poured the clear yellow mixture onto a baking sheet until it was cool. The process of making lemon drop candy is most like the formation of what type of rock? Igneous Igneous Metamorphic Metamorphic Sedimentary Sedimentary Conglomerate Conglomerate
Answer:
The answer is "Igneous".
Explanation:
Igneous rock (or magmatic rock) is one of the 3 main forms of stone, the other metamorphic and sedimentary, derived from Latin "ignis", which denotes flame, which is formed through magma or lava melting and reasserting.
This hardening of liquid-solid rock shapes the inglorious rock. Its diabasic, peridotite, gabs, quartz, pegmatites, or peridotite are examples of intrusive igneous rocks. Exceptional ignorant stones burst mostly on the surface, cooling fast and forming small crystals.
Describe the Electromagnetic spectrum. Which waves have most/least energy? List the colors in the visible spectrum from weakest to strongest.
what is reduction potential?
a. a measure of ionization energy of an element
b. a measure of the electronegativity of an element
c. a measure of the ability of the substance to be reduced
d.a measure of the oxidation state of an element
Reduction potential is a measure of the ability of a substance to be reduced
What is reduction potential?Reduction potential (Eo) can simply be defined as as that tendency of a chemical species or a substance to be reduced by gaining an electron.
Generally, the reduction potential of any chemical species can be determined by subtracting the standard reduction potential for the reaction occurring at the anode from the standard reduction potential for the reaction occurring at the cathode.
So therefore, reduction potential is a measure of the ability of a substance to be reduced
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Answer: c. a measure of the ability of the substance to be reduced
Explanation:
HELP ASAP 20 POINTS AAAA
Please help. write a paragraph using eight (8) of these terms.
observation
hypothesis
theory
matter
agent
experimental group
control group
temperature
particle
criteria
Answer:
Me and my friends were going to do a science experiment. Jonny’s job was to make the HYPOTHESIS. He said the “ If we mix baking soda and vinegar together, the TEMPERATURE will go down.”
So then Molly mixed the baking soda and vinegar together and checked the TEMPERATURE. We all OBSERVED as the thermometer’s TEMPERATURE went down. “ your THEORY/ HYPOTHESIS was correct!” Exclaimed Molly.
Then the whole science GROUP let out with a cheer! And wrote the information down on their EXPERIMENTAL info chart. They took a microscope and looked at the mixture because they wanted to the the little PARTICLES in the mixture. Lily CONTROLED the microscope she zoomed in and out to see the particles.
Explanation:
i hope this helps:)
Choose all the answers that apply.
The elements in group 18 _____.
are highly reactive
are gases at room temperature
usually do not react with other elements
are in a group called the noble gases
are nonmetals
Answer:
are gases at room temperature
usually do not react with other elements
are in a group called the noble gases
are nonmetals
Explanation:
The elements in group 18 or group O are the inert elements. They have completely outermost shell and are not reactive. Every atom reacts with another in order to be like the noble gases.
All of the elements here are gaseous. They do not readily react with other elements. They are called noble gases, inert gases, or group O elements.It should be noted that group 17 elements are very reactive compared to the group O elements.
Is potassium transparent
Answer:
some potassium can be
Explanation:
what causes a mountains to change in height or location
Movement of tectonic plates, erosion, earthquakes, and landslides, etc causes a mountains to change in height or location.
Some mountains might change due to the volcanic activities. Erosion occurs due to the rain and wind and primary reason for landslides to happen is flooding. When earth's crust presses against each other, the crust collects up to form the mountains. When erosion occurs, it erodes down the mountains and decreases their height making them shorter and less steep.The height and location of mountains change due to the movement of tectonic plates. When these tectonic plates shows movement, the height of mountains gradually increases and these plates produces high elevations resulting in the expansion of mountains. As much as the plates collide with each other, mountains will get taller and taller.The tectonic plates continuously moves slowly, but due to the friction, they stuck at the edge. These plates move away from each other and cause mild shocks of earthquake, or they move towards each other resulting in collision. This collision is very destructive. It brings down a mountain, resulting in gradual decrease of height of mountains.To learn more about mountains,
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write three types of boiling
Answer: Natural Convection Boiling.
Nucleate Boiling.
Transition Boiling.
Explanation:
What is the difference in actual yield and theoretical yield?
Answer: Theoretical yield Is what you expect stoichiometrically from a chemical reaction; actual yield is what you actually get from a chemical reaction
Explanation:
When a reaction happens we can have two yields
TheoreticalActualTheoretical is proved before or stochiometrically tested multiple times and stored as theory which we expect
Actual yields is that which we get actually from our reaction
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If a pea plant is hybrid for height, this means that
a) It has one dominant and one recessive allele
b) it has two of the same allele
PLSSSS HELP ASAP!!
Answer:
A
Explanation:
By nature, a hybrid has one dominante allele and one recessive allele
before the quarry was dug, the land contained more vegetation . what impact has this change most likely had on the local ecosystem