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At a temperature of 280 K, the gas in a cylinder has a volume of 20.0 liters. If the volume of the gas is decreased to 10.0 liters, what must the temperature be for the gas pressure to remain constant? (1 point) 140 K 273 K 560 K 5,600 K
Weegy: Find: V" for P'=P" Assumption: gas is ideal Using Charles's Law (Law of Volumes), since P'=P", V' / T' = V" / T" V" = V"T' / V' V" = (20.0L-10.0L)(280K) / (20.0L) V" = 140K (More)
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Asked 10/24/2012 10:58:33 AM
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If a solid piece of naphthalene is heated and remains at 80°C until it is completely melted, you know that 80ºC is (1 point) the freezing point of naphthalene. the melting point of naphthalene. the boiling point of naphthalene. both the freezing and melting points of naphthalene.
Weegy: D. both a and b User: Which of the following happens when ice melts? (1 point) Energy flows from the ice to its surroundings. Water molecules move from their fixed position. Water molecules lose energy. The temperature of the ice increases as it melts. Weegy: Water molecules move from their fixed position, happens when ice melts. (More)
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Asked 10/24/2012 11:01:40 AM
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What physical property makes wax good for making sculpture molds?
Weegy: Malleability helps, but the key word in the question is "molds". Low melting point is what is important. User: At a temperature of 280 K, the gas in a cylinder has a volume of 20.0 liters. If the volume of the gas is decreased to 10.0 liters, what must the temperature be for the gas pressure to remain constant? (1 point) Weegy: Carving wax is a smooth, non-brittle wax designed for carving and/or machining. Although the formulas for most commercial waxes are proprietary, most suppliers will state that hard waxes are some blend of waxes and plastics. [ This family of waxes has a hardness and consistency of plastic or softer wood. They can be cut or carved with knives, files and rotary or machine tools. To illustrate the usefulness of this type of wax, if one were to get a candle, mount it on a lathe and feed a tool into it, the wax would slough off like butter, stick to the tool and make a mess. Hard wax, on the other hand, will machine more like soft aluminum, giving fine edges and a fine finish if worked properly. ] (More)
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Asked 10/24/2012 10:54:34 AM
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1. The primary function of the _________________ is to supply the blood with oxygen so that the blood can deliver oxygen to all parts of the body. (1 point) Digestive system Cardiac system Respiratory system Endocrine system
Weegy: The primary function of the _________________ is to supply the blood with oxygen so that the blood can deliver oxygen to all parts of the body. (1 point) Respiratory system User: External respiration takes place in the ____________________. (1 point) Bronchi Trachea Alveoli Diaphragm Weegy: External respiration takes place in the ____________________. (1 point) Bronchi (More)
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Asked 10/25/2012 10:30:45 AM
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The ___________ is a strong wall of muscle that contracts to create a suction in the chest to draw in air and expand the lungs. When the muscle relaxes, the chest cavity decreases and the air is pushed out. (1 point)
Weegy: The Diaphragm is a strong wall of muscle that contracts to create a suction in the chest to draw in air and expand the lungs. When the muscle relaxes, the chest cavity decreases and the air is pushed out. (More)
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Asked 10/25/2012 10:31:35 AM
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