Answers
Answer:
a) 2
b) 2
c) 5
d) 5
e) 5
Explanation:
a) There is 1 Ag atom and 1 Cl atom. When there's no subscript number next to an element, it means there is only one.
b) There is 1 Ca atom and 1 O atom.
c) There are 3 Mg atoms (there's a subscript 3 next to Mg) and 2 N atoms.
d) There are 2 Al atoms and 3 O atoms.
e) There are 2 Sc atoms and 3 S atoms.
Related Questions
write three types of boiling
Answers
Answer: Natural Convection Boiling.
Nucleate Boiling.
Transition Boiling.
Explanation:
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
Answers
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
5. How many moles of calcium atoms are in each mole of calcium carbonate? (1 point)
Answers
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
Can someone please help me with number 10
Answers
For the reaction N2 + 3H2 - 2NH3, how many moles of nitrogen are required to produce 9.58 mol of ammonia?
Answers
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.
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
Answers
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.
Answers
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.
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?
Answers
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].
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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what two ways do nuclear power reactors harm the enviornment
Answers
Describe the Electromagnetic spectrum. Which waves have most/least energy? List the colors in the visible spectrum from weakest to strongest.
Answers
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
Answers
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:
please help me figure out which has 3 significant figures
Answers
Answer:
D
Explanation:
0 is between 6 and 2 so it's also a significant figure
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
Answers
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.
How many Barium would there be in the formula of Barium lodide
Answers
Answer: one barium atom and two iodine atoms are present in barium iodide
Explanation:
BaI2 is formula of barium iodide
before the quarry was dug, the land contained more vegetation . what impact has this change most likely had on the local ecosystem
Answers
Explanation:
The quarry was dug up and vegetation started dying. The quarry was probably rich with nutrients
Please brainliest !! ❤️
I have no idea what is what
Answers
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.
___ manifested as instantaneous charge difference is due to molecular interactions
Answers
Answer:
Dispersion forces are manifested as instantaneous charge differences due to molecular interactions
Explanation:
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!!
Answers
Answer:
A
Explanation:
By nature, a hybrid has one dominante allele and one recessive allele
what is universal indicator solution used for
Answers
What THREE organisms use photosynthesis?
Answers
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.
If the density of hydrochloric acid is 1.49 g/mL , what is the volume of 3.5 g of hydrochloric acid
Answers
The volume of 3.5g of hydrochloric acid that has a density of 1.49 g/mL is 2.35mL.
How to calculate volume?Density is a measure of the mass of matter contained by a unit volume. The density of a substance can be calculated by dividing the mass of the substance by its volume as follows:
Density = mass ÷ volume
According to this question, 3.5g of hydrochloric acid has a density of 1.49 g/mL. The volume contained in this mass of hydrochloric acid can be calculated as follows:
1.49g/mL = 3.5g ÷ V
V = 3.5 ÷ 1.49
V = 2.35mL
Therefore, the volume of 3.5g of hydrochloric acid that has a density of 1.49 g/mL is 2.35mL.
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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).
Answers
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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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.
Answers
Answer:B
Explanation:
It’s pretty obvious lol
What is the difference in actual yield and theoretical yield?
Answers
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
Is potassium transparent
Answers
Answer:
some potassium can be
Explanation:
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
Answers
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.
What would happen if Jupiter gravitational pull was increased or reduced?
Answers
Before I answer your question let me quickly say something. The force of gravity is dependent on two things: the masses of the two objects in question and the distance between them.
Jupiter will not increase its gravitational pull unless it swallows a black hole or merges with Saturn.
So...with that being said, should the gravitational pull hypothetically increase, the orbits of the moons would decrease in a radius squared proportionally and increase in angular velocity.
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:
what causes a mountains to change in height or location
Answers
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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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.
Answers
Answer:
The answer is C. (It delayed or extended nationalist struggles.)
Explanation:
Hope this helps!