Answer:
globe globe
Explanation:
Always wear goggles. Chemical splash goggles should be worn any time you are working with open flame, chemicals, or glassware
Wear appropriate clothing. Baggy clothes and long sleeves can be dangerous when working with chemicals, glassware, or an open flame. Some labs may require a lab coat.
Tie back long, loose hair. Long hair can get into chemicals or into an open flame.
Never taste anything in the lab unless told to do so. Do not taste to identify unless told by teacher. Even if you know it is water in a beaker, the beaker is dirty
Do not apply makeup in class. Chemicals can get into makeup
Distracted from lab. Do not eat or drink in lab
Chemicals can get into food. Spilling may ruin lab.
Wash your hands after lab is complete. Wash with soap and water even if you have gloves on. Use sinks in classroom.
Do not smell chemicals directly. Place chemical in container, hold it at arms length and wave hand over liquid to fan the fumes toward you.
Never remove lab materials from classroom.
Follow all lab procedures. Don't skip any steps and don't add extra steps. If you are unsure ask the teacher.
Never do extra experiments when finished with lab. Only do the lab that is assigned.
Always work in group. Never work alone. Must work in group whether you are friends or not. Do not go ahead of your group.
Stay at lab station. no wandering around room to visit other groups.
Know how to use lab equipment and use properly. lab equipment is not a toy. equipment is expensive and hard to replace.
keep equipment away from edges of counter top too close to the edge and it may fall and break.
No adult and you cannot be in the room. Wait patiently in the hall
No horseplay or pranks in the lab. may lead to serious injury.
clean up spills immediately, even water can be dangerous. depending on the substance you or the teacher will clean it up.
keep lab area clean. cluttered tables and aisles may lead to injury or broken equipment.
Report unsafe conditions or accidents to teacher immediately
do not try to fix broken equipment or give first aide on your own.
Know where all lab safety equipment is located.
eye wash station
shower
first aid equipment
Know how to work all of these
Which is an example of a constructive force?
Answer:
Volcanic eruptions is an example of a constructive force i believe.
Answer: Sediment, Techtonic plates, Crust deformation, and Volcanoes
Explanation:
Sediment (Deltas, sand dunes, etc.)
Tectonic Plates Colliding (Mountains)
Crust deformation (Folding or Faulting)
Volcanoes (makes Islands)
Which is the best explanation of why heat is released when
wood burns?
Select one:
A. Burning releases energy stored in chemical bonds.
B. Burning creates energy by increasing particle motion.
C. Burning destroys matter and creates energy from it.
D. Burning causes convection currents which create heat energy.
What do many employers require of respiratory technician? Check all that apply.
-Basic life support certification
-A specialized respiratory certification
-A four year medical degree
-Certification from the national board of respiratory care
-Socialize training in pediatrics or geriatrics
Answer:
1 & 4
Explanation:
just got it right on edge
Which pair of atoms can form an ionic bond?
A.
potassium (K) and fluorine (F)
B.
sodium (Na) and neon (Ne)
C.
fluorine (F) and chlorine (Cl)
D.
sodium (Na) and potassium (K)
Answer:
neon
Explanation:
PLEASE HELP ME ASAP
Which of the following is an example of an opposing force?
A
Gravity pulling a ball down a hill
B
Wind blowing a leaf off of a tree
с
Gravity holding a rock still on the ground
D
Water pushing against someone as they wade through a pool
Answer:
D.
Explanation:
Water pushing against someone as they wade through a pool is an opposing force.
plz help me swear will mark you brainiest
Answer:
C
Explanation:
The nitrogen fertilizer with the highest percentage of nitrogen is urea.
A farmer is breeding his best livestock is and example of?
Answer:
This is an example of selective breeding
Calculate the mass in grams of each sample.
4.68×1020 H2O2 molecules
What is the formula of a compound that has [1 mol Fe], [1 mol Ti], and [3 mol O]
Answer: [tex]FeTiO_3[/tex]
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
The molecular formula for a compound that has [1 mol Fe], [1 mol Ti], and [3 mol O] will be [tex]FeTiO_3[/tex]
Unknown elements W and X formed the compound image during a reaction. If element W has one valence electron, element X most likely has how many valence electrons
Answer:
I can't see the compound image but the safe guess here is that there is now noble gas config for the molecule so likely X has 7 valence electrons kind of like Na being W and Cl being X
Explanation:
John decided to cycle to his friend’s house at a speed of 28 km/h and the journey took 2 hours. How far did John cycle?
Answer:
THE ANSWER IS 56 :)))
Which law represents a balanced chemical reaction?
A. Avogadro‘s hypothesis
B. Ideal gas law
C. Newton’s 1st law of motion
D. Newton’s second law of motion
E.Law of conservation of mass
Answer:
E.Law of conservation of mass
Explanation:
How can a compound not conduct electricity as solid but do so when liquid?
HELP
Explanation:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ionsare free to move from place to place. Ionic compoundscannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.
What is the ratio of the effusion rate of the helium to methane? (round to hundreds)
Answer:
2.00
Explanation:
From Graham's law; the rate of effusion is inversely proportional to the square root of the relative molecular mass.
Let the rate of effusion of Helium be R1
Let the rate of effusion of Methane be R2
Let the molecular mass of Helium be M1
Let the molecular mass of Methane be M2
Hence;
R1/R2 = √M2/M1
R1/R2 = √16.0294/4.0026
R1/R2 = 2.00
Animal and plant organs are organized into organ stystems much like organize your homework in
Answer:
classes
Explanation:
All three types of worms that undergo asexual reproduction use which process?
binary fission
budding
fragmentation
spore formation
Answer:
binary fission
Explanation:
i just took the quiz
Why are large differences in temperature between the wet bulb and dry bulb thermometers are possible only at higher temperatures?
Answer:
At constant vapor pressure, the relative humidity decreases as the temperature increases, therefore, at higher temperature the relative humidity is low and water readily evaporates from the wet bulb thermometer that results in the cooling of the bulb such that at a given ambient temperature the very low relative humidity results in very large differences between the temperatures of the wet bulb thermometer and that of the dry bulb thermometer and the wet bulb is observed to be the colder thermometer of the two
Explanation:
Scientists have disocovered a new virus that is very different from any known viruses. What type of matter is the virus most likely made of
Answer: d. Compounds made by bonding of atoms of known elements.
Explanation:
Viruses are said to be so numerous that they vastly outnumber the number of stars in the universe. Viruses are quite small and are not technically alive until they get into a living cell.
Viruses are made up of compounds like everything else but just because a virus has not been discovered does not mean that it is made of unknown material. Every natural element available has already been discovered so any new virus is made of compounds of known elements.
WILL VOTE BEST & GIVE 20 POINTS
When completing your laboratory experiment, you placed 25.00 g of copper in the
graduated cylinder. Then you noticed the water level mark was filled to 50.0 ml. The total
mass of all the components is 58.80g. Know that the density of water is 1.0 g/ml, calculate
the density of this iron sample. Show all work.
Answer:
58.80/50= 2.352
Explanation:
kk
Ammonia (NH3) is produced in the human body as a waste product during the digestion of protein. How many moles of N2 will be needed to produce 87.00 grams of NH3?
N2 + 3 H2 ® 2 NH3
Answer:
43.5
Explanation:
there are 43.5 moles of N2
Based on the absolute dating of the rock layers in this photograph, what could a scientist conclude about a fossil found in area A?A.It is exactly 1.4 million years old.B.It is between 1.4 million and 2.1 million years old.C.It is more than 2.1 million years old.D.It is less than 1.4 million years old. I WILL GIVE BRAINLYIST TO FASTST PERSON WITH RIGHT ANSWER HELP ASAP
Answer: sorry I'm late I was looking for an answer but the right answer is D. It is less than 1.4 million years old
Explanation:
I was looking for an answer and I took the test and got this right
Stay safe and hope this helps ^^
Answer:D.It is less than 1.4 million years old
Explanation:
it is approved from apec
Evaporation of sweat requires energy and thus takes excess heat away from
the body. Some of the water that you drink may eventually be converted into
sweat and evaporate. If you drink a 20-ounce bottle of water that had been in the
refrigerator at 3.8 °C, how much heat is needed to convert all of that water into
sweat and then to vapor?? (Note: Your body temperature is 36.6 °C. For the
purpose of solving this problem, assume that the thermal properties of sweat are
the same as for water.)
Design a plan to solve this problem. What must be considered in order to solve
this? Explain it in words. Actual calculations are not needed, but can be included.
Answer: 3.90 C
Explanation:
How can scientists use stoichiometry to ensure that commercial products contain the components that manufacturers claim they do?
Answer:
I know you have been waiting awhile for this question to be answered :)
Stoichiometry is used in industry quite often to determine the amount of materials required to produce the desired amount of products in a given useful equation. Each one of these products requires stoichiometry. There would be no products from these industries without chemical stoichiometry.
Explanation:
Hopefully this helps :D
Sorry you had to wait so long :(
1 point
2. Due to its intricate network, minerals with sheet of tetrahedron do not
easily separate. *
True
False
is ammonia a compound element or mixture
Answer:
mixtyre
Explanation:
help pleaseeeeeeeeeeee
When the first ball in a Newton's cradle is pulled back and released, it causes the final ball to move. What does this example of mechanical energy show?
A. Mechanical energy is energy in motion
B. Mechanical energy travels in waves
C. Mechanical energy is stored energy
Answer:
A.Explanation:
Mechanical energy is energy in motion is the example of mechanical energy⚡
Which of the following is NOT a clue that could indicate a chemical change?
A. Change in color
B. Mixing of reactants
C. Change in energy
D. Release of a gas
E. Formation of a precipitate
Answer:
i think its C, but im not 100% sure. if not c, then D, but C sounds more right.
Explanation:
everything else sounds like sure fire sighs of a chem change. good luck
Magnesium bromide (one magnesium atom with two bromine atoms) has a
chemical formula of MgBrz. If you look at the total atomic mass of MgBr2,
does magnesium or bromine make up more of the mass?
they are exactly the same
it is impossible to tell
magnesium
bromine
Answer:bromine
Explanation:
The mass of magnesium is 24 whereas 1 bromine atom is 80 (rounded up from 79.9) and there is 2 bromine atoms which means you have to multiply 80 by 2, giving you 160.
in which part of the sun would the most helium be found?
it's most abundant in the mid latitudes.