Answer: 1.461 g of NaCl is dissolved in the solution.
Explanation:
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L.
The formula used to calculate molarity:
[tex]\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Given mass of solute}\times \text{Volume of solution (mL)}}[/tex] .....(1)
Given values:
Molarity of solution = 0.050 M
Molar mass of NaCl = 58.44 g/mol
Volume of solution = 500.0 mL
Putting values in equation 1, we get:
[tex]0.050=\frac{\text{Given mass of NaCl}\times 1000}{58.44\times 500}\\\\\text{Given mass of NaCl}=\frac{0.050\times 58.44\times 500}{1000}\\\\\text{Given mass of NaCl}=1.461g[/tex]
Hence, 1.461 g of NaCl is dissolved in the solution.
PLEASE ANSWER QUICKLY!! 25. Which gas sample contains a total of 3.0 x 1023 molecules?
A) 71 g of Cl2
B) 2.0 g of H2
C) 14 g of N2
D) 38 g of F2
Answer:
14 g of N2
Explanation:
If we look at the options, we will notice that the correct answer needs to be a gas that has about half of the molecular mass of the gas.
If we consider nitrogen gas whose molecular mass is 28g/mol, half of the molecular mass is 14 g.
So;
28g of N2 contains 6.02 × 10^23 molecules of N2
14g of N2 contains 14 × 6.02 × 10^23 /28
= 3.0 x 10^23
1) 2C2H6 + 7O2 --> 4CO2 + 6H2O
a) How many moles of O2 are required to react with 24 moles of C2H6?
b) How many grams of C2H6 are required to react with 12 moles of O2?
c) How many grams of O2 are required to react with 200g of C2H6?
Show how you got the answer
Answer:
a).
[tex]2 \: moles \: of \: ethane \: react \: with \: 7 \: moles \: of \: oxygen \\ 24 \: moles \: react \: with \: ( \frac{24 \times 7}{2} ) \: moles \\ = 84 \: moles[/tex]
b).
[tex]2 \: moles \: react \: with \: 7 \: moles \\ ( \frac{12 \times 2}{7} ) \: moles \: react \: with \: 12 \: moles \\ = 3 .43 \: moles \\ 1 \: mole \: weighs \: 30 \: g \\ 3.43 \: moles \: weigh \: (3.43 \times 30) \\ = 102.9 \: g[/tex]
c).
746.7 g
what type of volcanic eruption produce ash fall?
Explanation:
I would say explosive eruptions caused by decompression of the dissolved gases in the magma. The Mt Pinatubo eruption is an example of a massive ash fall that eventually closed down an American base in the Philippines. And just recently the island of St. Vincent suffered major damage from ash fall due to a volcanic eruption.
Solve: The following question in the picture
Answer:
D is the answer to your question in my opinion
Answer:
I think it is option A
Explanation:
XY 2 will be three molecules which is only a or b. As molecules are usually in a ddiagr like a, I would go with option a
De acuerdo con la primera ley de kihrechhoff determina las intensidades desconocidos así como su sentido. Ayudaaaa:(
oh sorry I'm American I can't understand that
Explanation:
but...thanks for points hehe
In which situation would hydrogen bonding be present?
Answer:
Water ?
Need more info.
Water is [tex]H_{2}[/tex]O
Explanation:
Answer:
Hydrogen bonding occurs when a protonic H is bonded to F, O or N and there must be a lone pair of electron in the F, O or N atom.
8 How did reducing the number of
decomposers affect the amount of carbon
dioxide in the ecosystem?
Answer:
Explanation:
As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.
In a chemical reaction, the number of moles of the reactants
A.
should always be equal to the number of moles of the products.
B.
depends on the amount of product that is formed.
C.
should never be equal to the number of moles of the products.
D.
may or may not be equal to the number of moles of the products.
Answer:
may or may not be equal to the number of moles of the products.
Explanation:
A chemical reaction involves the interaction between reactants to yield products. The number of moles of reactants and products in the system depends on the stoichiometry of the reaction.
The balanced reaction equation shows us the number of moles of reactants and products involved in the reaction.
Hence, in the balanced chemical reaction equation; the number of moles of reactants may or may not be equal to the number of moles of the products.
Question 8 of 10
Which functional group is within the compound shown below?
R-OH
A. Carbonyl
B. Amino
C. Ester
D. Hydroxy
Answer:
Hydroxyl (alcohol compound)
Explanation:
*view photo*
D. Hydroxy
A hydroxy or hydroxyl group is a functional group with the chemical formula -OH and composed of one oxygen atom covalently bonded to one hydrogen atom.Hydroxyl groups are polar, and the oxygen side is always negative, while the hydrogen side is always positive.The functional group of the alcohols is the hydroxyl group, –OH.For example: Methanol is an alcohol containing hydroxyl functional group.Therefore, the correct option is option D.
Learn more:
brainly.com/question/696051
2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of CaB 2 are produced, if 14.72 moles of NaBr and excess Ca(OH) 2 react?
Answer: 7.36 moles of [tex]CaBr_2[/tex] will be produced.
Explanation:
We are given:
Moles of NaBr = 14.72 moles
The given chemical equation follows:
[tex]2NaBr+Ca(OH)_2\rightarrow CaBr_2+2NaOH[/tex]
By the stoichiometry of the reaction:
2 moles of NaBr produces 1 mole of calcium bromide
So, 14.72 moles of NaBr will produce = [tex]\frac{1}{2}\times 14.72=7.36mol[/tex] of calcium bromide
Hence, 7.36 moles of [tex]CaBr_2[/tex] will be produced.
Which Reference Tables must be used to determine the number of carbon atoms in a parent chain and the type of bonding between the atoms in the parent chain?
O Table P, only
O Table P and Table O, only
O Table N and Table O, only
O Table P and Table Q, only
Answer:
Explanation:
Did you get the answer to the test, I have the same one but don’t understand the questions that well
What is the mass of 22.4 L of H2 at STP? (5 points)
1.01 gram
2.02 grams
11.2 grams
22.4 grams
The Mass of 22.4 L or 1 mole of H2 gas is 2.02 grams
What is the molar volume of a gas at STP?The molar volume of a gas at STP is equal to 22.4 L
This means that 1 mole of the gas occupies a volume of 22.4 L
Thus, 22.4 L of H2 gas equals one mole of H2 gas.
Mass of 1 mole of H2 gas = 2.02 grams
Learn more about molar volume of a gas at: https://brainly.com/question/11160940
Answer:
The Mass of 22.4 L or 1 mole of H2 gas is 2.02 grams
Explanation:
8. Classify stomach acid (HCL) on the basis of the number of ionizable hydrogens it has.
9. State the general properties of water-soluble acids.
Answer:
8. one ionizable hydrogen
9. Water-soluble organic acids, including dicarboxylic acids, such as malonic and glutaric acid,
Explanation:
8. A monoprotic acid is an acid that contains only one ionizable hydrogen. Hydrochloric acid and acetic acid are monoprotic acids. A polyprotic acid is an acid that contains multiple ionizable hydrogens
9. are a group of organic compounds often detected in atmospheric particles [Chebbi and Carlier, 1996; Kawamura and Kaplan, 1987; Saxena and Hildemann, 1996; Yang and Yu, 2008].
I hope this helps! It was a bit hard to find
Answer:
Answer:
8. one ionizable hydrogen
9. Water-soluble organic acids, including dicarboxylic acids, such as malonic and glutaric acid,
Explanation:
8. A monoprotic acid is an acid that contains only one ionizable hydrogen. Hydrochloric acid and acetic acid are monoprotic acids. A polyprotic acid is an acid that contains multiple ionizable hydrogens
9. are a group of organic compounds often detected in atmospheric particles
Explanation:
none
por que el petroleo es un no recurso renovable
Answer:
Por ejemplo, el petróleo o el carbón son ejemplos de recursos no renovables porque, aunque se forman mediante un proceso natural, este necesita demasiado tiempo. ... Esos combustibles fósiles provienen de materia orgánica, pero tardan cientos de miles de años en producirse.
what is large intestine
Explanation:
The large intestine (colon or large bowel) is about 5 feet long and about 3 inches in diameter. The colon absorbs water from wastes, creating stool. As stool enters the rectum, nerves there create the urge to defecate.hope it helps.stay safe healthy and happy!!!Write the formula for Magnesium sulphate
MgSO4 is the formula for magnesium
If a sample of oxygen has a volume of 160 L at 91 degrees celsius what will the oxygen be when the temperature drops to 0.00 degrees celsius.
Answer:
120 L
Explanation:
Step 1: Given data
Initial volume (V₁): 160 LInitial temperature (T₁): 91 °CFinal volume (V₂): ?Final temperature (T₂): 0.00 °CStep 2: Convert the temperatures to the Kelvin scale
We will use the following expression.
K = °C + 273.15
K = 91°C + 273.15 = 364 K
K = 0.00°C + 273.15 = 273.15 K
Step 3: Calculate the final volume occupied by the oxygen
Assuming ideal behavior and constant pressure, we can calculate the final volume occupied by the oxygen using Charles' law.
V₁/T₁ = V₂/T₂
V₂ = V₁ × T₂/T₁
V₂ = 160 L × 273.15 K/364 K = 120 L
Please help it’s due today
Estimate the heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is
converted to sulfur dioxide for the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
The heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is 2838kJ/mol. For the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
What is thermochemical equation ?A balanced stoichiometric chemical equation known as a thermochemical equation contains the enthalpy change, ΔH.
There are two types of thermochemical reaction:
Thermogenic Reaction. certain thermochemical processes that absorb heat. Enthalpy change for this reaction is favorable.
Heat-producing Reaction. Exothermic reactions are those in which energy or heat are released during the reaction.
A chemical equation shows the initial molecule, reactants, and final products separated by an arrow, but a thermochemical equation is a balanced stoichiometric chemical reaction that also includes the enthalpy change.
Thus, 2838 kJ/mol heat evolved in given equation.
To learn more about thermochemical equation refer the link below;
https://brainly.com/question/10023358
#SPJ2
17. A sample of oxygen gas has volume 150.0 mL, at 0.947 atm, what will be the volume of the gas at 750.12 mm of Hg if temperature remain constant.
Answer:
143.9 mL is the new volume for the gas.
Explanation:
Let's apply one of the gases law to solve this problem:
Boyle's law states that the product of pressure and volume remains constant when the T° is not modified.
P₁ . V₁ = P₂ . V₂
Be careful because we have T° in mmHg. We need to convert to atm:
750.12 mmHg . 1 atm / 760 mmHg = 0.987 atm
We replace data:
150 mL . 0.947 atm = 0.987 atm . V₂
V₂ = (150 mL . 0.947 atm) / 0.987 atm
V₂ = 143.9 mL
This term P . V comes from the Ideal Gases Law
P . V = n . R . T
HELLLLLPPPPP PLZZZZZZZ
Which is the graph of y = 5x + 5?
Answer:
I'm pretty sure it's The second one
Explanation:
That one is the only one that looks like it started on a positive 5
Answer:
B
Explanation:
6
Which of the following acid is a dibasic acid?
a) CH3COOH
b) H2SO4
C) HNO3
d) HNO2
Please let me know whether did I chose the correct answer for the following pictures. Please answer it with your knowledge not for the points, I really need this, thanks!!
Answer:
With my knowledge you got 2. correct, but that's all I could say.
Concentrations-
What is the final molarity of HCI if water is added to 17.8 mL of a 5.87 M HCI solution until the volume is 172 mL? (hint: find the moles in the original solution; the final solution will have the same number of moles)
If possible, provide work
What is the pressure of a gas at STP?
A. O atm
B. 2 atm
C. 1 atm
D. 0.5 atm
Answer:
C. 1 atm
Explanation:
More specifically it's .986 atm, but it's rounded up for this question.
Answer:
......it's letter C 1atm
What is the percentage yield when 60kg of ammonia is produced from 60kg of hydrogen?
Answer:
17.6%
Explanation:
%age yield is = actual yield /percentage yield ^100
1. Two hypothetical elements in the periodic table have different characteristics as shown in the following table.
ELEMENT, ELECTRONEGATIVITY, TYPE OF ION, ELECTRICAL CONDUCTIVITY, BRIGHTNESS
X Low Electro cation ion high conduc brightness yes
Y High Electro anion ion none conduc brightness no
According to the data in the table, answer the following questions.
a. If you were to carry out an experiment with these 2 hypothetical elements, write a hypothesis to differentiate them and write another hypothesis about how they would react with oxygen and water.
HYPOTHESIS 1:
HYPOTHESIS 2:
In four steps, design an experiment (write step 1, step 2, step 3 and step 4) to check and verify what types of links would form these elements X and Y if after a series of reactions these elements join in some type chemical bonding.
STEP 1
STEP 2
STEP 3
STEP 4
b. A series of reactions of elements X and Y are given below, complete these reactions bearing in mind that X has an oxidation number +2 and Y has an oxidation number +6.
I. X + O2 XO
II. Y + O2 YO3.
III. XO + H2O X(OH)2
IV. YO3 + H20 H2YO4.
V. X(OH)2 + H2YO4 A + H2O.
d. Considering the result (A) in reaction number 5, answer:
I. What type of chemical bond do you think A has?
II. What are its physical and chemical properties?
III. Design a four-step experiment so that you can identify the type of chemical bond that substance A obtained in reaction 5 has. The design must contain at least 2 variables to be measured and 2 hypotheses with these variables.
Answer:
gas and element and compound
Explanation:
because it's different and more power so the elements
helppppp meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
The industry represented in the photo is most likely fishing. Other industries that rely on accurate weather forecasts are shrimping, fishery, and aquaculture
Explanation:
De la siguiente reacción química Fe2O3 + 3 H2O → __Fe(OH)3 para que se cumpla el balanceo en ella, en el espacio qué coeficiente estequiométrico se debe asignar
Answer:
Para que se cumpla el balanceo en la reacción química, en el espacio se debe asignar 2 como coeficiente estequiométrico.
Explanation:
La ley de conservación de la materia establece que, dado que no se puede crear ni destruir ningún átomo en una reacción química, el número de átomos que están presentes en los reactivos debe ser igual al número de átomos presentes en los productos.
Luego, debes equilibrar la ecuación química. Para eso, primero debe mirar los subíndices al lado de cada átomo para encontrar el número de átomos en la ecuación. Si el mismo átomo aparece en más de una molécula, debes sumar sus cantidades.
Los coeficientes ubicados frente a cada molécula indican la cantidad de cada molécula para la reacción. Este coeficiente puede modificarse para equilibrar la ecuación, del mismo modo que nunca debe alterar los subíndices.
Al multiplicar el coeficiente mencionado por el subíndice, obtienes la cantidad de cada elemento presente en la reacción.
En este caso la reacción química es:
Fe₂O₃ + 3 H₂O ⇒ ____ Fe(OH)₃
Entonces, teniendo en cuenta todo lo anterior, se puede determinar la cantidad de elementos en cada lado de la ecuación:
Lado izquierdo: 2 hierro Fe, 6 oxígeno O y 6 hidrógenos H Lado derecho: 1 hierro Fe, 3 oxígeno O y 3 hidrógenos HSe puede observar que la reacción química no esta balanceada porque se tiene diferentes cantidades de cada elemento a cada lado de la reacción. Para equilibrarla, se comienza balanceando el hierro. Para eso, el coeficiente estequiométrico debe ser dos:
Fe₂O₃ + 3 H₂O ⇒ 2 Fe(OH)₃
Entonces:
Lado izquierdo: 2 hierro Fe, 6 oxígeno O y 6 hidrógenos H Lado derecho: 2 hierro Fe, 6 oxígeno O y 6 hidrógenos HAhora, a cada lado de la reacción se tiene la misma cantidad de cada elemento, por lo que la reacción esta balanceada.
Para que se cumpla el balanceo en la reacción química, en el espacio se debe asignar 2 como coeficiente estequiométrico.
hola genteee ayuda me pueden decir 5 propiedades físicas y 5 propiedades químicas del ácido sulfúrico porfa es urgente !
Answer:
La respuesta está en la explicación.
Explanation:
Las propiedades físicas son las visibles y medibles que no afectan químicamente la sustancia en cuestión. Las propiedades químicas hacen alusión a la reactividad de la sustancia:
Propiedades físicas ácido sulfúrico:
Líquido a temperatura ambiente.
Densidad: 1.83g/mL
Punto de fusión: 10°C
Punto de ebullición: 337°C
Índice de refracción: 1.397
Propiedades Químicas:
Ácido Fuerte.
Oxidante Fuerte.
Miscible con el agua reaccionando exotérmicamente.
A temperaturas > 30°C produce vapores azufrados.
Estable en concentraciones menores al 98%
