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Chemistry
Chemistry
High School
Two chemicals A and B are combined to form a chemical C. The rate, or velocity, of the reaction is proportional to the product of the instantaneous amounts of A and B not converted to chemical C. Initially, there are 100 grams of A and 50 grams of B, and for each gram of B, 2 grams of A is used. It is observed that 10 grams of C is formed in 7 minutes. How much is formed in 28 minutes? (Round your answer to one decimal place.) grams What is the limiting amount of C after a long time? grams How much of chemicals A and B remains after a long time? A grams B grams At what time is chemical C half-formed? t = min
Chemistry
College
In which phase transition do molecules move directly from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles?evaporationsublimationfreezingdeposition
Chemistry
College
which type of matter is represented by the particle diagram
Chemistry
High School
during chemical reaction do atoms change into a new substance true or false
Chemistry
College
What of the following is made out of atoms? (HINT: vocabulary word "atom" or "matter") * 1 Air 2 Light 3 Energy 4 Sound
Chemistry
High School
The periodic table is a(n) _________________________________ system for the elements.
Chemistry
Middle School
match each force abbreviation to the correct description.
Chemistry
College
is a granite a mineral or a rock
Chemistry
College
Calculate the atomic mass of the unknown element X described below. Please help
Chemistry
High School
anwser this ASAP please
Chemistry
High School
NH3 is a _______________
Chemistry
Middle School
Jessica is traveling from Miami, Florida, to Chicago, Illinois. Using the map, tell what the land will be like during the first half of her trip. The elevation will be high. The elevation will be low. The land will be mountainous. The land will stay below sea level.
Chemistry
High School
the advantage of asexual reproduction is. a. There are no genetic mutations b. reproduction doesn't require a mate c. increase genetic variation
Chemistry
High School
Repeat this calculation using Slater's rules to estimate the screening constant, S, and calculate Zeff for these two ions. Express your answers using two decimal places. Enter your answers numerically separated by a comma. 50 A 6 A 0 21 ? S. Zeff C, Zeff K+ =
Chemistry
Middle School
You know the drill by now-
Chemistry
High School
I will give you brainliest
Chemistry
High School
WILL GIVE 5 STAR RATING AND BRAINLIEST IF YOU ANSWER FIRST AND CORRECTLYWhat are the total number of elements in CHOH ?
Chemistry
High School
What do we call the (+) ion in an ionic bond? *O CationO AnionO MetalloidO Covalent
Chemistry
High School
PLEASE HELP 30 POINTSBecause the rock is irregularly shaped, you used the displacement method to measure its volume.You used (______) to indirectly find the (_____) of the objects.Options for the 1st fill in the blank:- a balance- calculations- a graduated cylinderOptions for the 2nd fill in the blank: - density- mass- area
Chemistry
Middle School
What can the student conclude about the experiments? (Attachment)I WILL MAKE YOU BRAINLIESTA. Experiments 1 and 2 show chemical changes because bubbles were produced.B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.C. Experiment 1 shows a chemical change because bubbles were produced, and experiment 2 shows a physical change because a liquid turned into a solid.D. Experiments 1 and 2 show physical changes because no new substances were produced.
Chemistry
College
I need help with these 2 problems ASAP please. This is not chemistry but i could not find science (THIS QUESTION IS FOR SCIENCE)
Chemistry
College
Why is it important o differentiate between human and animal blood from a crime scene? A) To determine whether an animal might have been injured. B) In order to accurately identify the source of any blood. In order to thoroughly and accurately recreate the crime scene. D To determine the possible source of any trace evidence such as hair or bite marks
Chemistry
High School
PLS HELP!! ASAP!! 10 POINTS!!From Dalton's atomic theory, a few parts were disproven over the course of years of experiments. Which part was modified by the discovery of subatomic particles? That matter is made of atoms. If the same elements are in a two different compounds, their ratio will always be the smallest whole number ratio for that compound. That atoms cannot be divided. That all atoms of an element are exactly the same
Chemistry
High School
Crystallisation is a separation technique used to separate____ solids from a liquid solvent.
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