Chemistry

Please help me it's urgent!!!!!
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Why do silver and copper have similar properties?(7th Grade science)
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Pls help with the question.
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how does a drought (lack of water) affect an ecosystem?
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what do a bald eagle, a komodo dragon, and a lizard have in common
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What type of circuit has a broken path that does NOT let current flow through it?A : Closed circuitB: Open circutC : Toggle D : Switch
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NEED THIS ASAP ILL MARK BRAINLIEST Nutrition is a common topic in the media, whether its a new diet plan or a new superfood on the market to benefit our health. Some of these products are scientifically sound, while others arent. How do we tell the difference?
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Question in the photos, any absurd answers will be reported ill give branliest to the most accurate answer
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2 uniones inicas y 2 covalentes, realizando las estructuras de Lewis correspondiente y averiguar la funcin del compuesto armado en la vida cotidiana.
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3. Calculate the average atomic mass of sulfur if 95.00% of all sulfur atoms havea mass of 31.972 amu, 0.76% has a mass of 32.971u and 4.22% have a mass of33.967u.
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what statement is the best description of a chemical bond
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Select all of the answers that apply.Which of the following characteristics must an air mass have?It flows as one unit.It has different temperatures but uniform humidity.It must be 1,000 miles or more in size.It must form over a low-pressure area.It has a uniform temperature and humidity.
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What does the reaction rate measure?O A. The collisions per secondO B. The speed of the reactionC. The reaction activation energyO D. The moles per liter of product
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Question 41 pts24) Which statement best describes what happens to the particles in ice as it melts?A) They lock into place.B) They move more rapidly.C) They lose some of their mars.D) They become electrically charged.
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What is the formation of gas is an example of?
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Certain minerals exclude lead but not uranium from their crystal structure, so when the minerals form they have no lead, only uranium. As time goes on, the uranium decays to lead, so measuring the ratio of lead atoms to uranium atoms allows investigators to determine the ages of the minerals. If a sample of a mineral contains 3 atoms of 207Pb207Pb for every 1 atom of 235U235U, how many years ago was it formed
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4In the Hatom , what is the correct order (arrangement) of energy levels
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Which of the following statements about biodiversity is TRUE?A. More biodiversity Less chance for an ecosystem to sustain itselfB. More biodiversity Better chance for an ecosystem to sustain itselfC. More biodiversity Less species in an ecosystemD. More biodiversity More pollution in an ecosystem
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How much heat is required to raise the temperature of 18 grams of liquid water by 25 C?
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Which halogens are gases at STP?
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The figure shows a nutrition label. How much energy does this food contain?
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How many particles are in a 151 g sample of Li2O?
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How many moles of water are produced from burning 80 moles ofmethane in excess oxygen?
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A] 1 N2 + 3 H2 2 NH3 1. How many moles and grams of ammonia can be made from 6.3 moles of H2 ? 2. How many moles and particles of ammonia can be made from 2.5 moles of N2 ? 3. How many moles is 425 g of ammonia? How many moles and grams of N2 are needed to make it? 4. How many moles and grams and liters of H2 are needed to make 10 moles of ammonia?
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