Chemistry : asked on juliah6925

10.01.2020

A homeowner buys 55.0 kilograms of propane (C3H8). She wants to know the total mass of carbon dioxide that will be produced when all of the propane combusts with oxygen in the air. In order to do the stoichiometry calculation necessary to answer that question, the homeowner will need all of the following information except-

Get Answer

Faq

Chemistry

How many moles of HF are in 30.mL of 0.15MHF(aq) ?

Step-by-step answer

P Answered by Master

Answer: 0.0045 mol
Explanation: Convert 30 ml to l: 30 mL = 0.03 L
Molarity = mol/l
mol = molarity * L
mol = 0.15 * 0.03 = 0.0045 mol
Answer: 0.0045 mol
Explanation: Convert 30 ml to l: 30 mL = 0.03 L
Molarity = mol/l
mol = molarit

Chemistry

Based on the equation, how many grams of Br2 are required to react completely with 29.2 grams of AlCl3 (5 points)? 2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2

Step-by-step answer

P Answered by PhD

Answer:

52.6 gram

Step-by-step explanation:

It is clear by the equation 2(27+3×35.5)= 267 gm of AlCl3 reacts with 6× 80 = 480 gm of Br2 . So 29.2 gm reacts = 480× 29.2/267= 52.6 gm

Chemistry

Which of the following will have a lower ionization energy than scandium

Step-by-step answer

P Answered by Master

Calcium (Ca)(On the periodic table, ionization energy increases as you go up and to the right of the periodic table)

Chemistry

The reaction of 15 moles carbon with 30 moles O2. Will result in a theoretical yield of_ moles CO2.

Step-by-step answer

P Answered by PhD

15 moles.Explanation:Hello,In this case, the undergoing chemical reaction is:Clearly, since carbon and oxygen are in a 1:1 molar ratio, 15 moles of carbon will completely react with 15 moles of oxygen, therefore 15 moles of oxygen remain as leftovers. In such a way, since carbon and carbon dioxide are also in a 1:1 molar ratio, the theoretical yield of carbon dioxide is 15 moles based on the stoichiometry:Best regards.

Chemistry

carbon 14 has a half life of 5730 years how much carbon 14 will remain in a 100 g sample after 11460 years

Step-by-step answer

P Answered by PhD

Answer: 25 g
Explanation: Given:
Original amount (N₀) = 100 g
Number of half-lives (n) = 11460/5730 = 2
Amount remaining (N) = ?
N = 1/2ⁿ × N₀
N = 1/2^2 × 100
N = 0.25 × 100
N = 25 g

Chemistry

A magnesium chloride solution reacts with potassium phosphate solution to form a white precipitate.knowing that virtually all potassium compounds are soluble they dissolve in water,write the balanced equation for this reaction.include all subscripts

Step-by-step answer

P Answered by PhD

Answer: The product formed is potassium chloride.
Explanation:
Precipitation reaction is defined as the chemical reaction in which an insoluble salt is formed when two solutions are mixed containing soluble substances. The insoluble salt settles down at the bottom of the reaction mixture.

The chemical equation for the reaction of potassium phosphate and magnesium chloride follows (look at the picture)

2 moles of aqueous solution of potassium phosphate reacts with 3 moles of aqueous solution of magnesium chloride to produce 1 mole of solid magnesium phosphate and 6 moles of aqueous solution of potassium chloride.
Answer: The product formed is potassium chloride.
Explanation:
Precipitation reaction is defined a

Chemistry

Chemistry, 29.01.2021 19:10 Lovely7290 Which chemical name and formula are correct A. Diarsenic pentoxide, A5O5 B. carbon tetrachloride, CCI4 C. Sodium dichromate, Na2Cr2 D. magnesium phosphide, MgP please help

Step-by-step answer

P Answered by PhD

Answer: B. carbon tetrachloride, CCI4
Explanation: The other options are incorrect. Let's write the correct formulas:
A. Diarsenic pentoxide - As2O5
C. Sodium dichromate - Na2Cr2O7
D. magnesium phosphide - Mg3P2

Chemistry

Classify each solution as acidic, basic, or neutral. a. [H+] = 6.0 x 10-10M b. [OH-] = 30 × 10-2M C. IH+1 = 20× 10-7M d. [OH-] = 1.0 x 10-7M

Step-by-step answer

P Answered by PhD

Answer: a. basic
b. basic
c. acidic
d. neutral

Explanation: Acids and bases can be classified in terms of hydrogen ions or hydroxide ions, or in terms of electron pairs. (look at the picture)
Let us note that from the pH scale, a pH of;
0 - 6.9 is acidic
7 is neutral
8 - 14 is basic

But pH= - log [H^+]
pOH = -log [OH^-]
Then;
pH + pOH = 14
Hence;
pH = 14 - pOH

a. [H+] = 6.0 x 10-10M
pH= 9.22 is basic
b. [OH-] = 30 × 10-2M
pH = 13.5 is basic
C. IH+1 = 20× 10-7M
pH = 0.56 is acidic
d. [OH-] = 1.0 x 10-7M
pH = 7 is neutral
Answer: a. basic
b. basic
c. acidic
d. neutral

Explanation: Acids and bases can be classified

Chemistry

3.70 mol CO2 has a volume of 25.12 L at a pressure of 978 mmHg. What is the temperature of the CO2 in degrees C?

Step-by-step answer

P Answered by PhD

Answer: -166.67 degrees Celsius.
Explanation: The equation of state of an ideal gas, also called the Mendeleev-Clapeyron equation, has the form: PV = nRT, where P is the density of the gas, V is the volume of the gas, n is the molar mass of the gas, T is the temperature of the gas, R is the universal gas constant = 8.314 J/(mol*K)
The gas temperature at a pressure of P = 978 mm. mercury column, molar mass n = 3.7 mol, and volume V = 25.12 liters is -166.67 degrees Celsius.

Chemistry

Practical investigation and the rate of reaction between sodium thiosuphate and hydrochloric acid What can I write in this experiment in background?

Step-by-step answer

P Answered by PhD

Answer: rate of reaction can be monitored by measuring the time taken for a fixed amount of sulphur to be produced
Explanation: The reaction of sodium thiosulfate with hydrochloric acid is:
Na₂S₂O₃(aq)+2HCl(aq)→2NaCl(aq)+SO₂(g)+S(s)+H₂O(l)
A precipitate of sulphur forms
Therefore rate of reaction can be monitored by measuring the time taken for a fixed amount of sulphur to be produced

free Ask question

Today we have helped

659 students

just now

Chemistry

Over an interval of 2.0 s the average rate of change of the concentration of C was measured to be 0.0540 M/s. What is the final concentration of A at the end of this same interval if its concentration was initially 2.000 M

p Answered by PhD

1 minute ago

Mathematics

Chicken noodle soup cans have a diameter of 2.4 inches and a height of 5.8 inches. What is the volume of the can? Round to the 10th. Show work pls thank you
30 points

m Answered by Master

1 minute ago