A student obtains 50.00 grams of calcium hydroxide.  Determine the number of hydroxide ions present in the sample.  Determine the numbers of calcium ions present.

Q: A sample of C,H, has 7.20 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

A: Given : The compound is C3H8. And number of H atoms in compound = 7.20 X 1024 atoms. The number of…

Q: How many daL of bromine are in 15.7 x 1022 molecules?  (The density of bromine is 3.1 g/cm3) The…

A: Given: The density of bromine = 3.1 g/cm3 We have to find How many daL of bromine are in 15.7 x 1022…

Q: K, writ 1. Aluminum • iron (III) oxide 2. magnesium chloride + bromine 3. potassium • copper (II)…

A:

Q: Without doing any calculations, determine which sample contains the most atoms.(a) one gram of…

A: Given; The mass of cobalt (Co) = 1 g The mass of carbon (C) = 1 g The mass of lead (Pb) = 1 g The…

Q: Differentiate between Molecules and Molecular Compounds?

A: Differentiate between Molecules and Molecular Compounds

Q: magnesium + oxygen → magnesium oxide List two physical / chemical properties for each compound

A: Physical properties are properties of substance that can be determined without changing substance's…

Q: Determine the correct number of significant figures the mass (g) of a mineral that is 20.67% by the…

A: Given that the mass percent of a mineral in titanium dioxide is 20.67 percent and the Mass of…

Q: Which sample contains the greatest number of atoms? 54.7 g V 51.2 g Mn 203 g Bi

A: To find number of atom we have to calculate number of moles first. Moles= given mass/molar mass…

Q: Complete the following table by writing the name or formula for the substance and identifying the…

A: The chemical formula is used to presenting information about the chemical proportions of atoms. The…

Q: a. Cl2(g) + NaBr(aq)→ NaCI(aq) + Br2(1) b. CaO(s) H2O(1)→ Ca(OH)2(aq) c. Ca(CIO-)2(s)→ CaCl2(s) +…

A:

Q: E H;PO2 HNO3 Sn, HCI A NANO2 B CUCN D H,SO4 HCl

A: Nitration of benzene is aromatic electrophilic substitution reaction where benzene acts as…

Q: What information must a chemist have to determine the molecular formula for a compound?

A: Molecular formula is the actual number of atoms of each element in the one molecule of the compound.

Q: What is the amount, in moles, of each elemental sample? 26.1 g Ta

A: Avagadro number (6.023 x 1023) provides us with the count of atoms or molecules present in 1 mole of…

Q: 1) 2 CH3MgBr 1) CH,MgBr Y Co,CH3 2) H20, HCI 2) Н,О, НCI

A: Given,

Q: Q/ 0.1 g a NaCL , qul Moarity2 L. Na = 23 . CI = 35.45 *

A: Kindly post question in english language from next time. I can't understand your language but…

Q: 1) Calculate the mass percent of sand in unknown mixture. 2) calculate the mass percent of copper…

A: The substance mass percent is expressed as the mathematical relationship between the substance mass…

Q: e mass of pure aluminum produced.

A:

Q: 9. Complete the columns in the table: formula: Sno2 P203 H3PO4(ag) calcium hydrogen name: chloric…

A:

Q: 4. H () + Br, (o)→ 2HB. 5. C,H (9) 2 (g) (g) C,H, + HI 2' '4(g) (6),

A: According to the rate law: The rate of a reaction is given by the product of the concentration of…

Q: Sodium carbonate is used in the manufacture of paper. What is the chemical formula for this…

A: Chemical formula of a compound is formed by the cross - valency rule. The valencies of both the…

Q: Analysis of a 39.8 g sample of water revealed a mass percent for lead of 4.87%. Calculate the number…

A: Molarity is defined as “the mole of the solute per unit volume of the solution”. It is represented…

Q: Na,CO3(aq) + CaCl2(aq) → 2 NaCI(aq) + CaCO3(s)

A:

Q: What experimental technique should you use to determine the density of an unknown substance? O…

A: The experimental technique used to determine the density of an unknown substance is __________ ?

Q: A sample of methane, CH4, has a mass of 58.25 g. Calculate the number of methane molecules in the…

A: Given mass of CH4 = 58.25 g Molar mass of CH4 = 16.04 g

Q: A student conducts an experiment using an unknown hydrate and obtains the following data Crucible…

A: Given - Crucible =  24.31g Crucible+ hydrate = 29.31g Crucible+ anhydrate =  28.26g Mg % = 29.44% S…

Q: A sample of C,H, has 9.28 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

A: Interpretation-  To determine the carbon atom in the give molecule C3H8 - To determine the total…

Q: One millimeter of water contains about 20 drops. One gram of water contains 3.34x10^22 molecules of…

A: One millilitre of water contains about 20 drops. One gram of water contains 3.34×1022 molecules of…

Q: Upon decomposition, one sample of magnesium fluoride produced 2.55 kg of magnesium and 3.99 kg of…

A: Given information, Magnesium is produced from the first sample is 2.55 kg. Fluorine is produced from…

Q: What is the mass in grams for a 50 mL and 100 mL beaker Then calculate the mass of Calcium chloride…

A: mass in gram of 50 ml and 100 ml beaker

Q: A 43.0 g sample of hydrated cobalt (II) sulfite is heated resulting in anhydrous cobalt (II) sulfite…

A: We have given that   A 43.0 g sample of hydrated cobalt (II) sulfite is heated resulting in…

Q: Explain the process that allowed you to take measurements of mass and volume and determine the…

A: The process that allowed you to take measurements of mass and volume and determine the identity of…

Q: When elements combine to form a compound are the properties of the elements retained in the…

A: No, the properties are not retained. When elements combine to form compounds, their individual…

Q: Write net ionic equations for the following reactions:

A: 1. write the balanced chemical equation. 2. write the states(s, l, g, aq. ) for each substance. 3.…

Q: Using a schematic diagram, illustrate how to separate the components of a mixture containing sand,…

A: Separating the components of a mixture containing sand, iron fillings and potassium aluminum sulfate

Q: A drop of water has a volume of 50 uL. How many water molecules does it contain? The density of…

A: Given that,Volume of water = 50 micro L = 0.05mLDensity of water = 1.0 g/mLNow, you calculate the…

Q: A typical cup of coffee has about 100. mg of caffeine. Calculate the number of caffeine molecules in…

A:

Q: 1. CuSO4 a. copper(I) sulfate b. copper sulfate c. copper(II) sulfate d. copper sulphide 2. Nal a.…

A: (1) Copper is a d block element, which is also known as transition element. It has atomic number of…

Q: How many helium atoms are there in a helium blimp containing 534 kg of helium?   Express the number…

A: Mole= mass/molar mass  Molar mass of Helium =4g/mol So first Calculate mole Then atoms…

Q: Calculate the mass of Na in 80.0 g NaCl. A. 31.5 g B. 6.2 g C. 40.0 g D. 1.9 g

A: molar mass of NaCl  =mass of Na +mass of Cl                                   =23+35.5…

Q: Analysis of a 49.5 g sample of water revealed a mass percent for lead of 4.53%.  Calculate the…

A: Mass of water=49.5 gram Mass percent  for lead= 4.53 % Number of grams of lead=?

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A:

Q: Upon decomposition, one sample of magnesium fluoride produces 1.65 kg of magnesium and 2.57 kg of…

A: The amount of magnesium produced on the decomposition of sample (I) of MgF2 is 1.65 kg. The amount…

Q: Complete

A: Since you have asked a question with  multiple sub-parts, we will solve  first three sub-parts for…

Q: Analysis of a 40 g sample of water revealed a mass percent for lead of 3.23%. Calculate the number…

A: Percentage by mass of the substance in the solution mixture can be expressed as the ratio of mass of…

Q: NaOH, NaNO2, NaCl, N

A:

Q: Choose the correct answer , make sure it is correct 100% 1. which of the following is a chemical…

A: Processes that involves the attraction of atoms are called Chemical process. While physical proesses…

Q: What is the process that allows you to take measurements of mass and volume and determine the…

A: Answer: Mass Determination: To determine the molar mass of an unknown metal chemically, first, we…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".