Homework Answers
Add Answer to:
mixed. (1) 9.110.274 moles of a substance weighs 62.5 g. what is the molar mass of...
1. An element, A, has 2 naturally occurring isotopes. Isotope-1 has a mass of 40.00 amu,...
1. An element, A, has 2 naturally occurring isotopes. Isotope-1 has a mass of 40.00 amu, and isotope-2 has a mass of 44.00 amu. If isotope-1 is 4 times more abundant than the isotope-2, what is the mass of element A?
QUESTION 1 The conversion factor which converts mass to moles is called the molar mass. True...
QUESTION 1 The conversion factor which converts mass to moles is called the molar mass. True False QUESTION 2 We have 2 moles of sodium (Na) atoms and 2 moles of chlorine (cl) atoms. The number of atoms for both are True False Question Completion Status: QUESTION 19 Which one of the following is not a soluble compound in water? O KOH CaSO4 O Li₃PO4 Mg(NO3)2 QUESTION 20 Which one of the following chemical equations is a balanced equation? CH(E)...
Both please !! ID: A An element has three naturally occurring isotopes. Information about each isotope...
Both please !!
ID: A An element has three naturally occurring isotopes. Information about each isotope is summarized below Isotope Isotope 1 Isotope 2 sotope 3 Mass(amu) 1 %Natural Abundance 4.946 5.983 53. (4 points) Find the average weighted atomic mass of this element. Observe the rals for significant ALL work MUST be show, including units, in order to receive PARTIAL credit 54, (4 points) Ferric chloride is 34.4% iron and 65.6% chlorine by mass. A chemist analyzes three compounds...
The combustion of octane, C,Hg, proceeds according to the reaction shown. 2C,H,8 (1) + 250,(g) -...
The combustion of octane, C,Hg, proceeds according to the reaction shown. 2C,H,8 (1) + 250,(g) - 16CO2(g) + 18 H,O(1) If 4.10 x 10 mol of octane combusts, what volume of carbon dioxide is produced at 38.0 °C and 0.995 atm? Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation MnO,(s) + 4 HCl(aq) — MnCl(aq) + 2 H,O(1) + C12(E) How much MnO, (s) should...
what is the answer to this? Chlorine can be prepared in the laboratory by the reaction...
what is the answer to this?
Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation MnO,(s) + 4 HCl(aq) + MnCl2(aq) + 2 H,0(1) + Cl2(g) How much MnO,(s) should be added to excess HCl(aq) to obtain 305 mL CL,(g) at 25 °C and 765 Torr? mass of MnO,
i) Asmall crystal has a mass of 7.03 mg The dimensions of the crystal are 3.80...
i) Asmall crystal has a mass of 7.03 mg The dimensions of the crystal are 3.80 mm x 2.95 mm x 1.70 mm. What is the density of the solid in g/cm"? LAB VII. PRACTICE PROBLEMS NAME: SECTION: PART B. CHAPTER 2 PROBLEMS 1) Isotopes a) Fill in the blanks to complete the table. Symbol Z A N of protons (p) N° of electrons (c) Nº neutrons (n) 10 AG 15 b) Copper has two naturally occurring isotopes: 69.17% of...
1) How many moles of water, H2O, contain 2.0×1022 molecules of water? Express the quantity in...
1) How many moles of water, H2O, contain 2.0×1022 molecules of water? Express the quantity in moles to two significant figures. Moles of water = ___________ mol 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 140 g of chlorine gas. Express the quantity in moles to three significant figures. Moles of chlorine gas = ___________ mol 3) Sodium hydroxide, NaOH, is a strong...
Need help slolving questions 1-6 please! Mass A Moles A Moles B Mass B Molar mass...
Need help slolving questions 1-6 please!
Mass A Moles A Moles B Mass B Molar mass A Molar mass B Ratio from balanced equation 1. How many moles of H2 can be made from complete reaction of 3.0 moles of AI? (5 pts) Given: 2 Al(s) + 6 HCl(aq)-2 AICI, (aq) + 3 H2(aq) 2. How many grams of water are made from the reaction of 4.0 grams of hydrogen gas? (10 pts) Given the reaction: 2H,(8) +0,(8) 2.0(g) 3....
1) An analysis indicated that the concentration of mercury in a sample of drinking water was...
1) An analysis indicated that the concentration of mercury in a sample of drinking water was 0.680 parts per billion. What quantity of mercury (g) was present in 15.0 L of the water, the density of which is 0.998 g/ml? A) 6.82 B) 1.72 x 10-8 C) 6.07 x 10-3 D) 1.06 x 10-6 E) 3.45 x 10-4 F) 4.54 x 10-5 G) 1.02 x 10-5 2) Boron has two naturally occurring isotopes, Boron-10 (10.01293 amu), and Boron-11 (11.0093 amu),...
1) Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride,...
1) Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride, MgCl2. Express your answer numerically in moles. 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 100 g of chlorine gas. Express the quantity in moles to three significant figures. 3) Sodium hydroxide, NaOH, is a strong base that is used in industrial synthesis and processes such as...
QUESTION 1 The conversion factor which converts mass to moles is called the molar mass. True False QUESTION 2 We have 2 moles of sodium (Na) atoms and 2 moles of chlorine (cl) atoms. The number of atoms for both are True False Question Completion Status: QUESTION 19 Which one of the following is not a soluble compound in water? O KOH CaSO4 O Li₃PO4 Mg(NO3)2 QUESTION 20 Which one of the following chemical equations is a balanced equation? CH(E)...
Both please !!
ID: A An element has three naturally occurring isotopes. Information about each isotope is summarized below Isotope Isotope 1 Isotope 2 sotope 3 Mass(amu) 1 %Natural Abundance 4.946 5.983 53. (4 points) Find the average weighted atomic mass of this element. Observe the rals for significant ALL work MUST be show, including units, in order to receive PARTIAL credit 54, (4 points) Ferric chloride is 34.4% iron and 65.6% chlorine by mass. A chemist analyzes three compounds...
The combustion of octane, C,Hg, proceeds according to the reaction shown. 2C,H,8 (1) + 250,(g) - 16CO2(g) + 18 H,O(1) If 4.10 x 10 mol of octane combusts, what volume of carbon dioxide is produced at 38.0 °C and 0.995 atm? Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation MnO,(s) + 4 HCl(aq) — MnCl(aq) + 2 H,O(1) + C12(E) How much MnO, (s) should...
what is the answer to this?
Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation MnO,(s) + 4 HCl(aq) + MnCl2(aq) + 2 H,0(1) + Cl2(g) How much MnO,(s) should be added to excess HCl(aq) to obtain 305 mL CL,(g) at 25 °C and 765 Torr? mass of MnO,
i) Asmall crystal has a mass of 7.03 mg The dimensions of the crystal are 3.80 mm x 2.95 mm x 1.70 mm. What is the density of the solid in g/cm"? LAB VII. PRACTICE PROBLEMS NAME: SECTION: PART B. CHAPTER 2 PROBLEMS 1) Isotopes a) Fill in the blanks to complete the table. Symbol Z A N of protons (p) N° of electrons (c) Nº neutrons (n) 10 AG 15 b) Copper has two naturally occurring isotopes: 69.17% of...
Need help slolving questions 1-6 please!
Mass A Moles A Moles B Mass B Molar mass A Molar mass B Ratio from balanced equation 1. How many moles of H2 can be made from complete reaction of 3.0 moles of AI? (5 pts) Given: 2 Al(s) + 6 HCl(aq)-2 AICI, (aq) + 3 H2(aq) 2. How many grams of water are made from the reaction of 4.0 grams of hydrogen gas? (10 pts) Given the reaction: 2H,(8) +0,(8) 2.0(g) 3....
1) An analysis indicated that the concentration of mercury in a sample of drinking water was 0.680 parts per billion. What quantity of mercury (g) was present in 15.0 L of the water, the density of which is 0.998 g/ml? A) 6.82 B) 1.72 x 10-8 C) 6.07 x 10-3 D) 1.06 x 10-6 E) 3.45 x 10-4 F) 4.54 x 10-5 G) 1.02 x 10-5 2) Boron has two naturally occurring isotopes, Boron-10 (10.01293 amu), and Boron-11 (11.0093 amu),...
Most questions answered within 3 hours.
-
In the Chesapeake region during the mid-17th
century how similar was the experience of an independent...
asked 1 hour ago -
. A 2.50 M stock solution was used to prepare a dilute NaOH
solution with a...
asked 2 hours ago -
Write a program that reads in a text file, infile.txt, and
prints out all the lines...
asked 5 hours ago -
Which of the following orbits have a total of zero energy (based
on the common convention)?...
asked 5 hours ago -
Find the expected count and the contribution to the chi-square
statistic for the (Group 1, No)...
asked 6 hours ago -
Suppose you are purchasing a meal and with every meal a you
receive one of 10...
asked 6 hours ago -
A 75.0 kg 0erson is riding in a car moving at 20.0 m/s when the
car...
asked 6 hours ago -
What does Δp = QR mean in words?
Pushing a viscous fluid through a pipe requires...
asked 6 hours ago -
We know that system.out.println (“object number” + n ); is
legal.String name; int n; name =...
asked 6 hours ago -
Come up with a real-life problem (open-ended) and solve it by
designing and writing a Java...
asked 6 hours ago -
Power Music owns five music stores, where it sells music,
instruments, and supplies. In addition, it...
asked 6 hours ago -
True or false and
why:
Given the following sequence of numbers to be
inserted {4,5,6,1,2,3,8,7}, the...
asked 7 hours ago