Answer: Silicon tetrachloride (g) + Mg (s) [tex]\rightarrow[/tex] Silicon (s) + Magnesium chloride (s)
[tex]SiCl_4(g)+Mg(s)\rightarrow Si(s)+MgCl_2(s)[/tex]
Explanation:
The word equation for Solid silicon and solid magnesium chloride form wen silicon tetrachloride gas reacts with magnesium metal :
Silicon tetrachloride (g) + Mg (s) [tex]\rightarrow[/tex] Silicon (s) + Magnesium chloride (s)
The skeletal equation where law of conservation of mass is not followed will be:
[tex]SiCl_4(g)+Mg(s)\rightarrow Si(s)+MgCl_2(s)[/tex]
Using the diagram, which two planes would intersect in HG?
Answer please .. :)
Answer:
I think D
Explanation:
it has both H and G in the planes.
1. Which of the following is not an example of a form of carbon?
O fullerenes
O graphite
salt
diamond
what is so unique about the ph scale 7?
Answer:
The pH scale 7 indicates neutral.
Explanation:
Beth has two unlabeled balloons, one filled with hydrogen gas and the second filled with neon gas. She researches and writes down the density of hydrogen and neon. Beth also has several chambers filled with various gases and a poster showing the densities of these gases. She has no other materials or tools available to her to help her identify the element in each balloon.The poster and Beth’s data are shown.
0.34 moles of calcium chloride is dissolved to make 2.5 liters of solution
Which solution is the least concentrated?
O 2
How is a scientific law different from other laws in society?
A. A scientific law serves to protect people, property, and nature from
harm.
OB. A scientific law describes what always happens under specific
conditions in nature.
C. A scientific law is a rule about how to treat and punish people.
D. A scientific law is what scientists have decided should be forced
to happen in nature.
Answer:
B. A scientific law describes what always happens under specific
conditions in nature.
Explanation:
Scientific law is something that has been proven over and over and therefore is always correct under conditions in nature.
Answer:
B. A scientific law describes what always happens under specific
conditions in nature.
Explanation:
Scientific law is based on observation and experiments to support a claim. It usually describes nature.
different between methane and ethane.
heeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp
If you're wearing a yellow shirt in magenta light, what colour does the shirt look like now?
Explain the flexibility and the flow characteristics of water
Explanation:
Flow-duration data are daily mean flow values measured over a specified time interval that have been exceeded various percentages of the specified time interval.
Water is a very flexible material. It can flow in many different directions and shapes. This flexibility makes it great for many different purposes, such as drinking, washing, and irrigation. Water is considered to be a flexible substance because it can change its shape according to space.
What are the characteristics of water?Water is a liquid at standard temperature and pressure (25 degrees Celsius and 1 atm, for liquids).
Water is is tasteless and odorless.
Water is transparent in the visible part of the electromagnetic spectrum.
Water can act as either an acid or a base.
Water is a universal solvent, dissolving many substances found in nature.
Water is the most abundant compound on Earth’s surface. In nature, water exists in the liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at 0 degrees Celsius and 1 atm of pressure. At room temperature (approximately 25 degrees Celsius), it is a tasteless, odorless, and colorless liquid. Many substances dissolve in water, and it is commonly referred to as the universal solvent.
Therefore, Water is a very flexible material. It can flow in many different directions and shapes. This flexibility makes it great for many different purposes, such as drinking, washing, and irrigation. Water is considered to be a flexible substance because it can change its shape according to space.
Learn more about water, here:
https://brainly.com/question/28465561
#SPJ2
An unknown concentration of sodium thiosulfate, Na2S2O3, is used to titrate a standardized solution of KIO3 with excess KI present. Suppose 15.55 mL of the Na2S2O3 solution is required to titrate the iodine formed from 21.45 mL of 0.0135 M KIO3. What is the molarity of the Na2S2O3 solution?
Answer:
0.112M is molarity of the Na₂S₂O₃ solution
Explanation:
First, the KIO₃ reacts with KI as follows:
KIO3 (aq) + 5 KI (aq) + 6 HCl (aq) → 3 I2 (s) + 6 KCl (aq) + 3 H2O (l)
Then, the I₂ produced reacts with the Na₂S₂O₃ as follows:
2 Na2S2O3 + I2 → Na2S4O6 + 2 NaI
Thus, to solve this question, we need to obtain the moles of KIO₃ that react, then, the moles of I₂ produced -Using the chemical reaction- to find the initial moles of Na₂S₂O₃. With these moles and the volume we can find molarity of the solution:
Moles KIO₃:
21.45mL = 0.02145L * (0.0135mol/L) = 2.896x10⁻⁴ moles KIO₃
Moles I₂:
2.896x10⁻⁴ moles KIO₃ * (3mol I₂ / 1mol KIO₃) = 8.687x10⁻⁴ moles I₂
Moles Na₂S₂O₃:
8.687x10⁻⁴ moles I₂ * (2mol Na₂S₂O₃ / 1mol I₂) = 1.737x10⁻³ moles Na₂S₂O₃
As the volume of the titrated solution is 15.55mL, molarity is:
1.737x10⁻³ moles Na₂S₂O₃ / 0.01555L =
0.112M is molarity of the Na₂S₂O₃ solution2KCIO3 -> 2KCI+ 302
How many moles of oxygen are produced by
the decomposition of 6.0 moles of potassium
chlorate, KCIO3?
Answer:
9 moles
Explanation:
The balanced chemical equation for this decomposition reaction is as follows:
2KCIO3 → 2KCI+ 302
Based on this equation, 2 moles of potassium chlorate (KCIO3) decomposes to form 3 moles of oxygen gas (O2).
Hence, 6 moles of pottasium chlorate will decompose to produce;
6 × 3 ÷ 2
= 18 ÷ 2
= 9 moles of O2.
precautions of a radioactive decay lab ?
Answer:
Don't touch radioactive waste with bare hands
Don't eat the radioactive thing
Wear protective eyewear
Wear lab coat/gloves
Explanation:
https://ehs.princeton.edu/laboratory-research/radiation-safety/radioactive-materials/handling-radioactive-materials-safely
Princeton article
Using standard formation enthalpies, calculate the standard reaction enthalpy for this reaction. 6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g) ANSWER: kJ/mol
Answer:
2802.5 KJ/mol
Explanation:
Calculate standard enthalpy of the Reaction :
6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g)
using standard formation enthalpies . hence the standard enthalpy of the reaction = 2802.5 KJ/mol
attached below is the detailed solution
List several other words that are formed using the prefix mon or mono what do these words have in common
Answer:
1) Monochrome
2) Monocot
3) Monosaccharide
4) Monounsaturated
5) Monoxide
Explanation:
The prefix mono or mon is of Greek origin and it means single, lone or one.
From the meaning of the words we can tell that they have something in common:
1) Monochrome: This refers to an artwork, a painting or drawing that has just one color.
2) Monocot: This is a type of flowering plant that has a single embryo and a single cotyledon.
3) Monosaccharide: This is a type of simple sugar that contains one sugar unit that cannot be split.
4) Monounsaturated: This refers to a molecule that contains one double or triple bond.
5) Monoxide: This refers to a form of oxide that contains only one oxygen atom.
From the definitions above, all the words mean having only one or a single item.
That is what they have in common.
Dipole-dipole interactions are (weaker than, stronger than, equal to) hydrogen bonds.
Answer and Explanation:
Dipole-Dipole interactions are weaker than hydrogen bonds.
Hydrogen bonds are a form of dipole-dipole interactions, being the strongest form of dipole-dipole interactions.
#teamtrees #PAW (Plant And Water)
CaC2 + 2H2O ⟶ C2H2 + Ca(OH)2
How many moles of water are needed to produce 56.8g C2H2?
Amount of moles of water is 4.36 mol
Explanation: M(C2H2) = 2·12.01 + 2·1.008 = 26.036 g/mol
Amount of substance is n= m/M= 56.8 g / 26.036 g/mol= 2.18159 mol
Water is needed 2·2.18 mol = 4.36 mol
I need help ASAP
Extra points & brainlest:)
Answer:
it is c
Explanation:
Answer:
Lysosome
Explanation:
The lysosome of a cell removes waste and deports it to the Golgi Apparatus to remove completely
Which is the correct complete ionic equation for the reaction of
2HCl(aq) + Zn(s) + H2(g) + ZnCl2(aq)?
a) H+(aq) + CI-(aq) + Zn(s) →
H2(g) + Zn2+(aq) + Cl-(aq)
b) 2H+(aq) + 2C1-(aq) + Zn(s) → H2(g) + Zn2+(aq) + 2Cl-(aq)
c) H+(aq) + Zn(s) → H2(g) + Zn2+(aq)
d) 2H+(aq) + Zn(s) → H2(g) + Zn2+(aq)
Answer:
b) 2H+(aq) + 2C1-(aq) + Zn(s) → H2(g) + Zn2+(aq) + 2Cl-(aq)
Explanation:
The equation is given as;
2HCl(aq) + Zn(s) + H2(g) + ZnCl2(aq)
In writing an ionic equation, only the aqueous compounds dissociates into ions. This means HCl and ZnCl2 would dissociate to form ions.
This is given as;
2H+ + 2Cl- + Zn(s) --> H2(g) + Zn2+ + 2Cl-
The correct option is;
b) 2H+(aq) + 2C1-(aq) + Zn(s) → H2(g) + Zn2+(aq) + 2Cl-(aq)
classify the following elements under metals, non metals and metalloids, boron, zinc Mercury, silicon, oxygen, nitrogen, sodium
Answer:
Zinc mercury transition metal
Silicon boron metalloid
Oxygen nitrogen non metal
Sodium alkali metal
Explanation:
Work out the empirical formula of a compound that contains 35% of nitrogen , 5% of hydrogen and 60% of oxygen.
Answer:
[tex]H_5N_5O_6[/tex]
Explanation:
Hello there!
In this case, for the determination of empirical formulas, it is firstly necessary to assume the given percentages of the constituent atoms as the masses so we can compute their moles in the formula:
[tex]n_N=\frac{35gN}{14.01g/mol} =2.5molN\\\\n_H=\frac{5g}{1.01 g/mol}=5molH\\\\n_O=\frac{60g}{16 g/mol} =3molO[/tex]
Thus, we need to divide the resulting moles, by the fewest ones (those of nitrogen) in order to determine the coefficients in the formula:
[tex]N:\frac{2.5}{2.5}=1\\\\H:\frac{5}{2.5}=2\\\\O:\frac{3}{2.5} =1.2[/tex]
However, we need to turn all these numbers, whole numbers, so we multiply by 5 to get:
[tex]H_5N_5O_6[/tex]
Best regards!
Which of the nine substances are made of three elements?
Answer: You are made of mostly 6 elements: Oxygen, Carbon, Hydrogen, Nitrogen, Calcium, and Phosphorus. Some of these elements combine to form compounds in your body.
Explanation:
what is the grams of molar mass of magnesium
Answer:
4.0359398 × 10^-23 g
Explanation:
All explanations or thoughts led to that answer
Dalton's contribution was different from thatof the ancient Greek who postulated the existence of atoms. Point out the differences between the two ideas
Answer: Democritus atomic theory is the ancient theory that describes the nature of matter in terms of atoms whereas Dalton atomic theory is a modern scientific theory that describes the nature of matter in terms of atoms. According to Dalton's theory, atoms are identically same, but Democritus had no idea about it. Atoms are never created nor destroyed, they just rearrange.
Explanation:
the action force
According to Newton's third law of motion, a reaction force between two objects is
but in the opposite direction.
equal to
greater than
less than
Answer:
equal to - it's opposite but equal energy is the third law
1- What is the molar mass of the following compounds?
a. Ca(OH) 2 _______________________________=
b. H 2 O 2 _______________________________=
c. KCl _______________________________=
d. NaH 2 PO_______________________________=
Answer:
a. Ca(OH)₂ = 74.08 g/mol
b. H₂O₂ = 34 g/mol
c. KCl = 74.55 g/mol
d. NaH₂PO₄ = 119.97 g/mol
Explanation:
In order to determine the molar mass of each compound we need to sum, the molar mass of each element.
a. Ca(OH)₂
40.08 g/mol (Ca) + 2 . 16 g/mol (O) + 2 . 1 g/mol (H) = 74.08 g/mol
b. H₂O₂ → 2 . 1 g/mol (H) + 2 . 16 g/mol (O) = 34 g/mol
c. KCl → 39.1 g/mol (K) + 35.45 g/mol (Cl) = 74.55 g/mol
d. NaH₂PO₄
23 g/mol (Na) + 2 . 1 g/mol (H) + 30.97 g/mol (P) + 4 . 16 g/mol (O) = 119.97 g/mol
what known as a change in the number, type, or order of DNA
Answer:
DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation. Depending on how a particular mutation modifies an organism's genetic makeup, it can prove harmless, helpful, or even hurtful.
Explanation:
Select the correct answer.
An Iron bar at 200°C Is placed in thermal contact with an Identical Iron bar at 120°C In an Isolated system. After 30 minutes, both Iron bars are at
160°C. If the Iron bars were placed in thermal contact in an open system Instead of an Isolated systemn, how would the results be different?
Assume that the room temperature Is 25°C.
The temperatures of the Iron bars after 30 minutes would be less than 160°C because heat would be lost to the surroundings.
O B. It would take more than 30 minutes for both Iron bars to reach 60°C because heat would be transferred less efficiently.
O c
The temperatures of both Iron bars would Increase as they absorb heat from the surroundings.
O D. The temperatures of both Iron bars would decrease because pleces of them would be ost to the surroundings.
Answer:of
Explanation:
This equation is balanced.
C + S8 -4CS2
True
False
False.....................
what is the function of a prism
Answer:
Prisms are sometimes used for the internal reflection at the surfaces rather than for dispersion. If light inside the prism hits one of the surfaces at a sufficiently steep angle, total internal reflection occurs and all of the light is reflected.
Explanation:
Prism, in optics, piece of glass or other transparent material cut with precise angles and plane faces, useful for analyzing and reflecting light. An ordinary triangular prism can separate white light into its constituent colours, called a spectrum.
