Answer,
For example, silver ion can be precipitated with hydrochloric acid to yield solid silver chloride. Because many cations will not react with hydrochloric acid in this way, this simple reaction can be used to separate ions that form insoluble chlorides from those that do not.
can someone help me? i dont think i did this right..
Explanation:
wat exactly do u need to do here?
Please help me
A sample of a liquid with mass of 8.657g was decomposed into its elements and gave 5.217 g of carbon ,0.9620 g of hydrogen, and 2.478g of oxygen. What is the percentage composition of this compound
Answer:
The percent composition of a compound is the calculated measure of each ... A sample of a liquid with a mass of 8.657 grams was discovered into its elements ad gave 5.217 grams of carbon, 0.9620 grams of hydrogen, and 2.478 grams of oxygen. ... mass of oxygen = 2.478 grams ... 14.01 g/mol x100 = 3.03 g/mol x 100.
Hope this helps, please let me know If I'm wrong.
Using the formula M V1 = M2V2 , how many milliliters of a 2.50 M
hydrochloric acid solution is required to make 100.0 mL of a 0.750 M
solution?
1.88
333mL
300mL
30mL
Answer:30mL
Explanation:
If you add 2.50 with 0.750 divide that by 100 you would get 30.7 something without rounding it would be 30.
Deadline homework if someone could this I make u a brainlist. Thanks
WILL GIVE BRAINLIEST
Which if the following help a tropical storm become a hurricane?
making landfall
a cold wind
an earthquake
warm water
Answer:
an earthquake
Explanation:
The reaction below proceeds spontaneously at 298 K. NH3(g) Cl2(g)Right arrow. NH4Cl(s) What is the sign of the entropy change, Delta. S? Delta. S is negative because the product is less random than the reactants. Delta. S is negative because the reactants are less random than the product. Delta. S is positive because the product is less random than the reactants. Delta. S is positive because the reactants are less random than the product.
A spontaneous reaction favours the product formation and increases the entropy of the isolated system. The sign of the entropy change will be negative as the product formation is less random.
What is entropy?Entropy is the degree of the disorder or randomness that occurs in the system that lacks available energy and cannot convert the mechanical energy or work.
The entropy of the reaction will be negative as the reactants are present in the gaseous state and the product formed is solid. The product formation was spontaneous and less random.
Therefore, option a. entropy will be negative as product formation is less random.
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Why is this element considered
unreactive or inert?
P: 10
N: 10
Answer:
It is a noble gas.
Explanation:
The element in question is helium, a noble gas. It has a full shell of eight valence electrons like all the other noble gases, which means that it does not have to react with other elements in order to obtain a full octet of valence electrons. This means that it does not react with other elements.
lab report solubility edge
Answer:
i'm attaching the report i made
Explanation:
(It does include the chart information)
hope this helps! have a wonderful day :)
The solubility of a solid solute increases with temperature.
What is the effect of temperature on the solubility of a solute?The solubility of a solute is the amount of solute that dissolves in a given volume of solvent at a particular temperature.
The solubility of a solute increases with increase in temperature.
Based on the lab results, it was seen that with increase in temperature, the mass of sugar that dissolves in water increases.
50 mL of water at 2 °C dissolved only 80 g of sugar whereas at 102 °C, 250 g of sugar dissolved.
Therefore, it can be concluded that solubility of a solute increases with temperature.
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Hola Brainlians! I need your help in chemistry today
Question:-
Names and chemical formulas of all compounds formed by first 30 elements.
Note:-
In between these 30 elements ,there is carbon and hydrogen present who has infinite no of organic compounds .So just mentioning the common compounds
Here we go
Sodium chloride (NaCl)Lithium hydride(LiH)Methane(CH_4)Zinc sulphate (ZnSO_4)Ferus Ferric oxide(Fe_3O_4)Water(H_2O)Hydrochloric acid(H_2SO_4)Molybdenom oxide(Mo_2O_3)Cuprous oxide(Cu_2O)Potassium permanganate (KMnO_4)Potassium chloride (KCl)Magnesium oxide (MgO)Calcium hydroxide (Ca(OH)_2)Calcium oxide(CaO)Phosphorus pentachloride (PCl_5)Nitrous oxide (N_2O)Carbon dioxide (CO_2)Carbon monoxide (CO)Glucose(C_6H_12O_6)Baking soda(NaHCO_3)What are the characteristics of a fibrous root system? (Select all that apply.)
made up of many roots
made up of one large root
made up of thin roots
made up of branched roots
Answer:branched roots and thin roots and many roots
How many liters of solvent would be needed to create a 5.5 M solution from 22 moles of sodium chloride?
According to molar concentration, four liters of solvent would be needed to create a 5.5 M solution from 22 moles of sodium chloride.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters. Substitution of values in formula gives, volume= 22/5.5=4 liters.
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how many molecules of water are there in 8.050 x 10^3 grams of water
Answer:This is approximately 2.69 * 10^26 molecules.
Explanation:
i just know
General characteristics of S block elements
Answer:
soft metalslow melting and boiling points low ionization enthalpies (energies) and are highly electro positive.Explanation:
Hope it helps!!!!
what do i do can u help:)
Answer:
The locations of the volcanoes tend to be close/on the earthquake lines/zones and this is because earthquake activity forms mountains/volcanoes and also causes those volcanoes to erupt. The reason the earthquake zones are long lines is because earthquakes usually happen on fault lines, or where two tectonic plates are next to each other. These plates are like a jigsaw puzzle, as in, they are everywhere making up the pieces of the surface of the globe. So that's why they are long lines.
Why is calcium in group 2A if the modern periodic table
The largest source of background ionizing radiation in the United States is _____, which is formed in the decay series of uranium.
The correct statement will be"The largest source of background ionizing radiation in the United States is Radon (Rn)which is formed in the decay series of uranium."
What is the largest source of background ionizing radiation in the United States?Generally, Ionizing radiation is simply defined as a state of energy that works by releasing electrons from their parent atoms or the molecules of materials.
In conclusion, Radon (Rn) a chemical element of Group 18 in the periodic table is the largest source of background ionizing radiation in the United States.
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A gas in a 3.5-L container has a pressure of 285 mm Hg. When the gas is transferred completely to a 750 mL container at the same emperalure, the pressure will be
Answer:
285
Explanation:
Answer to all these questions...
Answer:
A. Atomic number is 8, mass number of M is 16
B. Oxygen, O
C. 8 valence electrons, valency is 2
Explanation:
A. Atomic number = proton number
M2- = 2 extra electrons after forming octet structure, so 10-2=8
8 corresponds to number of protons, so atomic number is 8.
Mass number is number of protons + neutrons = 8+8=16
B. 8 in periodic table corresponds to oxygen
C. Number of valence electrons in an oxide ion is 8, valency is two as it forms -2 charge
If you mix food dye with water, is that a physical change or chemical? (Cause my teacher said chemical)
Explanation:
well, I dunno if I'm correct but I think it's a physical change cause no new substance is formed
the outer planets have a very _______ atmosphere
~Shoto Todoroki here~
Except for Pluto, the outer planets are alike in a lot of ways. They are much bigger than the inner planets. They are made mostly of hydrogen and helium. The hydrogen and helium are in the form of gas in the planets' atmospheres.
hope this helps :D
Answer:
The atmospheres of outer planets are made of hydrogen and helium, so that should help.
Write the expressions for the equilibrium constants of the reactions below.
a.N2 () + 3H2 () ⇌ 2NH3 ()
b. Br2 () + H2 () ⇌ 2HBr ()
c.CO () + H2O () ⇌ H2 () + CO2 ()
Answer:
Hey Man I dont know the Answer Im really sorry
Explanation:
I took the test though
The chemical equation below shows the photosynthesis reaction. 6CO2 6H2O Right arrow. C6H12O6 6O2 The molar mass of carbon dioxide (CO2) is 44. 01 g/mol. The molar mass of water (H2O) is 18. 02 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction? 12. 0 moles 72. 0 moles 216 moles 528 moles.
A photosynthetic reaction is the formation of the glucose and oxygen molecule by water and carbon dioxide. 12 moles of water will be used in the reaction.
What are moles?Moles are the ratio of the mass of the substance to the molar mass of the substance.
In the photosynthetic reaction, 6 moles of carbon dioxide and 6 moles of water are utilized to produce 1 mole of a glucose molecule and 6 moles of oxygen.
From this, it can be said that the number of moles consumed of carbon dioxide and water will be equal and in the ratio of 1:1.
The number of moles of carbon dioxide will be equal to that of the water molecule and will also be equal to the ratio of the mass of carbon dioxide to the molar mass of carbon dioxide.
The moles of water will be calculated as:
[tex]\begin{aligned}\rm moles &= \rm \dfrac{\text{mass of CO}_{2}}{\text{molar mass of CO}_{2}}\\\\&= \dfrac{528}{44.01}\\\\&= 12\;\rm moles\end{aligned}[/tex]
Therefore, option A. 12 moles of water will be used.
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As the rate of physical weathering increases, the amount of chemical weathering also increases because
Answer:
Hehe!
Explanation:
Because Increased surface area provides more surface for chemical weathering to attack the rock,allowing chemical weathering to speed up.
Burning hydrogen is an example of a chemical reaction. The reaction is
shown in the diagram. Which of the following sthtements about energy in
this reaction is the most accurate?
Answer:
Energy is absorbed
Explanation:
since 1932 i learn this
Which of the following is a measure of the randomness of a system?
O A. Heat
O B. Energy
O C. Efficiency
O D. Entropy
Rebecca placed an uncharged object next to an electrically charged object, and they were attracted to each other. She moved the charged object and placed it next to another uncharged object, and they were attracted to each other. What is the best explanation as to why this happened? The charged object kept its charge.
The charged object lost its charge.
The second object had a stronger charge.
The second object had a weaker charge.(PLEASE HELP)
Answer:
the second object had a weaker charge
Explanation:
the charged object had a stronger charge and opposite to that of the uncharged hence causing attraction
Answer:
d
Explanation:
The second object had a weaker charge.
how many iron atoms are there in 5.33 mol of iron(iii) chloride
Answer:
The formula shows that there is one atoms of iron in each formula unit of FeCl3, and by definition the number of molecules or formula units in a mole is Avogadro's Number. Therefore, 5.33 moles contains 5.33 X Avogadro's Number of atoms, which is 3.21 X 1024 atoms, to the justified number of significant digits.
Answer:
The formula shows that there is one atoms of iron in each formula unit of FeCl3 , and by definition the number of molecules or formula units in a mole is Avogadro's Number . Therefore , 5.33 moles contains 5.33 X Avogadro's Number of atoms , which is 3.21 X 1024 atoms , to the justified number of significant digits .
2.a) when a bydrocarbon fuel is burnt, one of the main products is slightly acidic gas R Whats the name of gas R?
Answer:
Carbon and hydrogen atoms in the hydrocarbon fuel react with oxygen in an exothermic reaction. carbon dioxide and water are produced
Which of the following substances dissolves most readily in water?
a. CH
c. NH3
b. BaSO4
d. CaCO3
1. Destiny is working in the lab with a filter. She has a mixture of Aluminum Phosphate (AlPO4)
and water. She knows if she runs the mixture through her filter she will collect some solid
because
a. AIPO, is soluble in water
b. AIPO, is insoluble in water
c. AIPO, is attracted to the filter
d. Water is soluble in water