Chemistry

The DEA has designated five chemicals often found in spice as _____ controlled substances, making it illegal to sell, buy, or possess these chemicals.
1 Answer
How many atoms of lead are present in 78.40 grams of lead?
1 Answer
an atom has 10 protons and a mass number of 18 how many neutrons does it contain
2 Answers
______________ is a durable material and is widely used for casting, which is a process by which the melted material is poured into a mold. A. Bronze c. Copper b. Silver d. Gold Please select the best answer from the choices provided A B C D.
1 Answer
The law of conservation of matter states that matter can be neither created nor destroyed. Your friend shows you the following chemical equation: CaCO,CaO+CO, He says that because the oxygen atoms are split between two different molecules in the products, the equation does not support the law of conservation of matter. Is your friend right? Explain your answer.
1 Answer
Pure silver has a brilliant white metallic luster. How many moles of silver, Ag, are in 7.54 1023 atoms of silver?
1 Answer
Element of group 2 loses two electrons in the process of a chemical combustion. what is the ionic charge? +2 or -2
1 Answer
If 16800 J of energy are added to 4200g of water, what will the change in temperature (delta T) of the water be? Specific heat of water is 4.184 J/gC *
1 Answer
Which description of salt is a physical property?
2 Answers
What is the amplitude of the above wave?
1 Answer
Is it unbalanced or balanced if hydrogen reacts to iodine?
1 Answer
How many totals atoms are present in the compound : Mg(OH)2A. 3B. 4C. 5D. 7
1 Answer
convert 150 K to degrees F
1 Answer
If a chromosome folds, how is transcription prevented?Question 2 options:The DNA region is easily accessible.The DNA region is not easily accessible.The RNA region is not easily accessible.The RNA has already been made.
1 Answer
Apply Concepts6. Describe the ecosystem in the picture.
1 Answer
The density of iron is 7.0 g/cm'. What volume of iron would have a mass of 14.0 g?
2 Answers
Why is the energy supplied by the cooker greater than that calculated in part (a)
1 Answer
2. Transfer in energy to reach the highest amount of kinetic energy for both substance B and C.3. Slowly transfer out energy from each substance. Note the temperature at which each substance changes phase.Substance B changed to a liquid at ANSWER: C.Substance C changed to a liquid at ANSWER: C.For Science please answer the questions with the word "ANSWER"4. Based on your observations above, which substance needed a greater decrease in kinetic energy in order to change phase?The substance with (medium or low) ANSWER: Pick which one it is! attraction needed more energy transferred out in order to change phase.
1 Answer
3.What relationship do P and V have at a constant temperature? (Direct or Inverse)1.What relationship to V and T have at a constant pressure? (Direct or Inverse) and please dont put just a link thx
1 Answer
molecules diffusing with the concentration gradient through a protein channel is
1 Answer
in which time period did the first animals that could live both in water and on land appear
1 Answer
dubnium chloride chemical formula
2 Answers
What are the most important topics for revision in chemistry?
1 Answer
If you wanted to make a crucible for melting sodium (Na), which metal would be most suitable for that purpose
2 Answers