Which phrase describes a compound that .consists of two elements? (1) a mixture in which the elements are in a variable proportion (2) a mixture in which the elements are in a fixed proportion (3) a substance in which the elements are chemically combined in a varíable proportion (4) a substance in which the elements are chemically combined in a fixed proportion Given the particle diagram:

Q: Consider a mixture of 10 billion O2 molecules and 10 billion H2 molecules. In what way is this…

A: The 1st mixture contains 10 billion or 109 O2 molecules and H2 molecules. The 2nd mixture has 109…

Q: Molecules containing only non metal use a prefix system. What is prefix represent 4?

A: When naming molecular compounds prefixes are used to dictate the number of a given element present…

Q: 2. After the first day of treatment, patients receive a smaller maintenance dose of Remdesivir. This…

A:

Q: What is the definition of the first compound notation?

A: Given To know the first compound notation

Q: Write correct ionic formulas for the following light emitting compounds by entering the number for…

A: Ionic compounds are formed by the transfer of electrons from cations to anions. Cations are…

Q: Which of the following are pure substances? Explain.(a) Calcium chloride, used to melt ice on roads,…

A: A pure substance is a substance that contains the same types of atoms or molecules. They are made of…

Q: A compound consists of elements combined in a fixed ratio. True or False

A: An element is a pure chemical substance made of same type of atoms.  The compounds are made up of…

Q: Complete the Venn diagram to compare and contrast elements and compounds. Elements Compounds

A: The differences and similarities between the elements and compounds are asked in the venn diagram

Q: 1) Which of the following elements is a metal? A) nitrogen 2) Which of the following elements is a…

A: 1.nitrogen is a non metalic element Which belongs to group 15.2.fluorine is also a non metal which…

Q: Compounds are "neutral." What does that mean?

A:

Q: Supposed to magnesium feelings and sulfur or heat it so they react with each other forming magnesium…

A: Concept: The pure substances have constant composition throughout the given substance. The mixed…

Q: hydrochloric acid + magnesium → hydrogen gas + magnesium chloride List two physical / chemical…

A: The question is based on the concept of chemical reactions. we have to write physical and chemical…

Q: If the density of Al metal in aluminum is 2.699g/cm3, estimate the number of atoms/cm2 in a foil…

A:

Q: CREATE A CONCEPT MAP FROM THIS PASSAGE: In this article, we will discuss polyatomic ions. The prefix…

A: A monoatomic ion is an ion composed of a single atom and a polyatomic ion is an ion that is composed…

Q: Potassium chloride is a salt substitute. It consists of potassium cations and chloride anions.…

A: 1.Element are simple  form of matter , example Na. 2.ionic compound are the compound form by cation…

Q: Which of the following is a chemical property? O Changing shape Melting point O Oxidizing…

A: Physical change: In a physical change the physical state of matter changes. In this change different…

Q: present

A: Dear student I have given answer to your question in the image format.

Q: In order to correctly name a compound, you must first be able to classify the type of compound.…

A: CBr3KClHClRbOHCu2OSi2S4Au2Br10H3PO4

Q: There are four sketches below. The first sketch shows a sample of Substance X. The three sketches…

A: Given changes it undergoes Type of Change = Need to determine

Q: 4. If the manufacturer of Remdesivir has access to 1394 g of phosphorus atoms, how many grams of…

A: The chemical formula of Ramdesivir: C27H35N6O8P. The given mass of phosphorus atoms = 1394 g Atomic…

Q: 7. Determine the type of compound (molecular, ionic, or acid) described below. Some may have more…

A: Ionic solids have high melting and boiling point, ionic compounds, generally, composed of metallic…

Q: What is atom? molecule? compounds? definition, structure and  examples? The structure of atoms?

A: Given the following terms: Atom Molecule Compounds

Q: Remember that the nitric acid in water is H'lao) and NOa ta). The brown gas evolved is an oxide of…

A: The solution is given below -

Q: If you take one teaspoon of salt and dissolve it in one cup of water, what would that look like?…

A: homogeneous solutions are those solutions which have uniform composition throughout the solutions.

Q: It would be really hard to measure the mass of the foam explosion. How does knowing the amount of…

A: The foam explosion experiment involves mixing hydrogen peroxide, soap and food colouring dye before…

Q: A large number of atoms of the same kind is

A: Matter is classified into following types  1 Pure  substances        2. Mixture    1. In Pure…

Q: Which of the following is a molecular compound? (A) PCl5 (B) P4 (C) NH4Cl (D) NaCl (E) All…

A: A molecular compound can be defined as a compound where the atoms share electrons through covalent…

Q: Give the chemical formula for each of the following ionic compounds:(a) sodium phosphate, (b) zinc…

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

Q: How many atoms are in one molecule of Na2SO4? How many different elements are in the compound…

A: The compound Na2SO4 contains two sodium atoms, one sulfur atom and four oxygen atoms in its chemical…

Q: Which of the following elements is a gas at room temperature? bromine carbon helium sodium

A: We have to find out the element from question which is gas at room temperature.