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Find the number of moles in 300 g of carbon dioxide.

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What is a correct statement of Newtons second law? a. When an object experiences a net force, it will accelerate at a rate determined by its mass. b. Every action has an equal and opposite reaction. c. An object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net force. d. Every mass in the universe is attracted to every other mass in the universe.

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Please help :)A car is moving on a straight road at a constant speed of 70 km/hr. What forces are in balance to keep the car moving at this constant speed?

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Which type of organic molecule is an amino acid? A. building block of carbohydrates B. building block of proteins C. building block of nucleic acids D. building block of lipids

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Which of the following will stay constant, no matter if the substance is in the solid, liquid, or gas state? volume shape temperature mass

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What is the greatest force acting on a falling object as its speeds up toward the ground

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Elements with similar properties [A] sodium and bromine [B] lithium and sodium [C] carbon and oxygen [D] potassium and helium

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What is the vapor pressure of carbon disulfide at its normal boiling point?

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Types of fossil fuels include: hydrogen oil carbon dioxide wind coal natural gas ammonia (mark all answers that apply)

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The box in the picture begins motionless, and then both forces are applied at the same time. Describe the resulting motion of the box. A) The box will not move. B) The box will move to the left. C) The box will move to the right. D) The box will move to the left and then the right.

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The simplest structures that can carry out all of the activities characteristics of life are?

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Which of these is a mixture? a. oxygen b. air c. carbon dioxide d. carbon

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In Hooke’s law, what does k represent? A. the distance the spring stretches B. the elastic constant, a number that tells the relative strength of the spring C. the constant of gravity D. the amount of force acting on the spring

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24 POINTS URGENT PLEASE HELP TRUE OR FALSE It takes less force to accelerate an object that has more mass than one that has less mass.

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The chemical formula of lithium carbonate is Li2CO3. Which statement below best describes the types and number of atoms of each element making up this substance?

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If the initial velocity of the car in the previous problem (the car accelerates at 5.00 km/hr/s for 3.50 sec) is 22.6 km/hr, what is the final velocity of the car?

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The growing of plants, burning of wood, and decomposition of living matter demonstrate how carbon can be in the _______ at the same time. a. atmosphere and biosphere b. biosphere and geosphere c. geosphere and atmosphere d. atmosphere, biosphere, and geosphere

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A car experiences an average acceleration of 5.00 km/hr/s for 3.50 sec. What is the change in velocity of the car?

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Tides are caused by the force of gravity from the sun and moon acting on Earth.

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What is the mass of 1.00 mol of sodium hydrogen carbonate?

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Which is a pair of allotropes? A. carbon-14 and carbon-12 B. diamond and carbon dioxide C. iron(III) oxide and iron(II) oxide D. molecular oxygen and ozone

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Nitrogen has one more valence electron than a carbon has.What can you infer about nitrogen s location on the periodic table

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What does newton’s third law say about why momentum is conserved in collisions? A. Equal forces act in equal times, so the change in momentum for both objects must be equal. B. Unequal forces act in unequal times, so the change in momentum for both objects must be equal. C. Unequal forces act in unequal times, so the change in momentum for both objects must be unequal. D. Equal forces act in unequal times, so the change in momentum for both objects must be equal.

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I. A chemical change breaks bonds, forms new substances, and is irreversible. II. Reordering the intermolecular forces is indicative of a chemical change. III. During a physical change the substance remains the same, no bonds are broken, and the process is reversible. IV. Permanently altering the makeup of the substance is characteristic of a physical change. Which conclusion(s) best elaborate(s) on the difference(s) between a chemical change and a physical change? A) I & III B) II & IV C) III & II D) IV & I

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PLEASE HELP! Amy has a mass of 30 kg, and she is riding a skateboard traveling 5 m/s. What is her momentum? 5 kg*m/s 6 kg*m/s 30 kg*m/s 150 kg*m/s

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Which element is most likely to carry electric current easily? tin sulfur anitmony selenium

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Charles Law A balloon of helium was put in the freezer at -23°C. Its volume at this temperature was 2.5 liters. It was removed from the freezer. Eventually, it reached a temperature of 177°C. What would its volume be at this temperature? (Neglect any force used to stretch the rubber balloon.) HELP ASAP A. 1.4 B. 45000 C. 4.5 D. 0.22

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Which of the following forms the greatest number of strong covalent bonds and is therefore the backbone of organic molecules including carbohydrates, proteins, lipids and nucleic acids? ACarbon BHydrogen COxygen DPhosphorus

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A student tested a sample of carbon (C) by combining it with water. There was no reaction between the carbon and water. The student concluded that carbon must be a group 18 element, since it was unreactive. State whether you agree with the student’s reasoning, and explain why or why not?

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How many atoms of each element (Carbon, Hydrogen and Oxygen) are in a sample of 1.202 grams of Sucrose (C12H22O11)? There are 0.042 moles Carbon, 0.077 moles Hydrogen and 0.386 moles Oxygen in this sample.

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