Master Chemistry with Fun Quizzes & Brain Teasers!

An atom of aluminum (AI) has an atomic number of 13 and a mass number of27. How many neutrons does it have?
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Which of the following is the correct measurement for the volume of liquid shown below?A 50.1 mLB 51 mLC 50.2 mLD 52.0 mL
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What is the density of an object with a mass of 57.8g and a volume of 112.4mL?
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In a sample of a solid the particles areA.not moving.B.vibrating about a fixed position.C.sliding past each other.D.moving independently around the container.
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97.2 kJ of heat is added to a 12.0 kg block or iron. what is the temperature change of the block?
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Construct the electron dot diagram for chlorine.Step 1: Use the periodic table to find the chemical symbolfor chlorine.The symbol for chlorine is:CrI will mark u braniest xcl XD
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What type of force should be applied on a football to move it forward? Balanced force in backward direction Unbalanced force in forward direction Non-contact force in backward direction Gravitational force in downward direction
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A student performed an investigation at sea level. First she placed 400 mL of water in four different containers. Then she placed the containers on hot plates with four different temperature settings, as shown in the table.
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what do i do if me mum is a karen
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Classify each living thing of bacteria Please hurry
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Bohr shows that electrons stay in discrete energy levels around the nucleus. A. True B. False
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What is the net ionic equation for a reaction between HCl and NaOH
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The sun emits electromagnetic waves at many frequencies, but mostly in the infrared, visible, and ultravioletspectrums. What kind of energy is this?nuclearradiantthermalchemicalHELP
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Rougher surfaces create more friction, so more force is needed to move something over a rougher surface, true or false
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Which best compares freezing and condensation?Both involve changes between liquids and gases. Both involve changes between gases and solids. Both involve the release of heat. Both involve the absorption of heat.
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what is the name for BrCl5
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the figure shown has two parallel lines cut by a transversal
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Which best describes the law of conservation of mass? (1 point)The coefficients in front of the chemicals in the reactants should be based on the physical state of the products.O Products in the form of gases are not considered a part of the total mass change from reactants to products.Owhen reactants contain both a solid and a liquid, the solid counts toward the overall mass and the liquid does not.The mass of the reactants and products is equal and is not dependent on the physical state of the substances.
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A material has a density of 8.9 g per c m cubed. You have three cubic centimeters of the substance. What is the material's mass in grams?Question 25 options:3.0 g0.3 g27 g5.9 g
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Are most elements on the periodic table nonmetals?
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28Which is true?a)All elements are made of atoms.b)All atoms are made of elements.c)Atoms can be seen with normal microscopes.d)Only some types of matter are made of elements.29Which particles make up the center of an atom?A) only protonsB) only electronsC)protons and neutronD)neutrons and electrons
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It takes more force to move an object with less mass.True or false
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In the wave-mechanical model of the atom, an orbital is defined as1.a region of the most probable proton location2.a region of the most probable electron location3.a circular path traveled by a proton around the nucleus4.a circular path traveled by an electron around the nucleu
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To stop an object that is in motion on a frictionless surface, you stop applying a force.True or false
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