write down ten laboratory safety rules
laboratory safety rules:
~Avoid wye contact with all chemics
~ Avoid skin contact with all chemicals
~Always wear safety glasses
~Don't eat in the lab
~Don't drink anything in the lab
~Avoid wearing jewellery
~Don't taste or sniff any chemicals
~Kn0w emergency exit routes
~Never leave containers of chemicals open
~Avoid distracting anyone else working in the lab
Hope this helped you- have a good day bro cya)
2. Differentiate the types of tectonic plates.
Answer:
Explanation:
Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust. ...
Divergent boundaries – where two plates are moving apart. ...
Transform boundaries – where plates slide passed each other.
Someone pls help me I will make you brain
Answer:
The answer is steam of fossil fuels
Help me out with this question , can someone give me the answer ?
:((
Answer:
I pretty usre they cause erosion wich makes fresh soil so B.
Explanation:
What metal is highly reactive and bonds easily with other elements
Answer: alkali metal
Explanation: ONLY if that is in you suggestions
if not i think this is right
Water quality tests show the presence of a single heavy metal in the drinking water pulled from a local river. Residents are suffering from numerous stomach ailments and are showing signs of long-term kidney damage. The residents of the next town, down river from the first town, seem to be unaffected. Water quality tests in the river by the second town show two types of heavy metals at acceptable legal limits in the water. One of the metals is the same as the one in the first town. What can scientists infer about the possible reason for the illnesses appearing in the first town but not the second?
One metal causes an acute effect, compared to the other.
One metal causes a chronic effect, compared to the other.
The heavy metals have a synergistic relationship when combined.
The heavy metals have an antagonistic relationship when combined.
Answer:
One metal causes a chronic effect, compared to the other
Explanation:
because the question only said ONE is the same, didn't they? so that would mean that not all the metals are the same for both towns
Is it _________
To view _______ eclipse without eve protection.
A.Unsafe, lunar
B.Safe, solar
C.Unsafe, solar
D.Unsafe new moon
Answer:
unsafe, solar
Explanation:
A lunar eclipse covers the moon which is safe to look at. New Moon, again is simply the moon. However, we should never look at the sun, eclipsed or not!
Answer:
C, it is unsafe to view solar
without eye protection
What is a pure substance that contains atoms of more than one element called?
O a mixture
O a precipitate
O a compound
O a solution
Answer:
Pure substances made of more than one element are called. compounds. The chemical formula for a molecule of nitrogen is. N2. The balanced equation for the formation of water from the elements hydrogen and oxygen is.
Answer:
A compund
Explanation:
Did test got 100
the modern model of the atom shows that electrons are:
Using the formula velocity = distance/time, how fast does sound travel in air at 20 degrees C given a distance of 500 m and 3.92 seconds.
A- 3.92
B- 127 m/s
C- 2,941 m/s
D- 746 m/s
Answer:
B : 127m/s
Explanation:
= 500 ÷ 3.92
= 127.5
An astronomer is describing an orbiting body she recently observed. Based on this description, determine which region of the solar system the body is most likely to reside in:
At its closest, the observed body was 2.4 AU from the Sun. At this point, we were able to determine that it was composed primarily of rock and metal, although we do not know exactly which metals it contains. Its orbit is not a perfect ellipse because it moves slightly every time Jupiter passes by.
asteroid belt
inner planets
outer planets
Kuiper Belt
Oort cloud
Answer:
Asteroid belt
Explanation:
Answer:
asteriod belt i think?
Explanation:
sorry if im wrong but Jupiter does pass pretty close to the asteroid belt
Brainliest?
Por que los egipcios podrían haber construido pirámides?
Please help serious answers only
Answer:
Neptune and Saturn although Neptune isn't on there so just Saturn.
hope it'll help ya out!
Help me Plz, I am really confused
Someone pls help me I will make you brain
Answer:
Its the first one
Explanation:
I learned this before
What is 40g of calcium and 71 g of chlorine
How do anion formation and valence electrons relate?
Answer:
Atoms gain valence electrons to form anions.
Explanation:
why is each individual produced by sexual reproduction unique?
Answer:
During sexual reproduction the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents. The genetic diversity of sexually produced offspring is thought to give species a better chance of surviving in an unpredictable or changing environment.
204,900,000,000
How many significant digits are found?
Answer:
4
Explanation:
There are 4 significant figures because when there is not a decimal, then only numerical values over 0 are counted. So the numbers counted in sig figs are 2049, and none of the other 0s.
So if it was 204,900,000,000.0, then it would have 12 significant figures.
A molecule is made up of more than one element ?
Answer:
Yes it is
Explanation:
How else do you think nitrogen or oxygen is made?
Explain Rutherford’s gold foil experiment. What particle did he discover?
Answer:
this my answer
Explanation:
Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.the part of an atom that has an overall positive charge is called
Contrast the cause of the attraction in ionic bonds
and metallic bonds.
Which elements are present in all organic compounds? 1. Hydrogen and oxygen 2. Nitrogen and Carbon 3. Nitrogen and oxygen 4. Hydrogen and Carbon
Answer:
my answer is num:3 Hydrogen and oxygen.
An atom of an element with atomic number 48 and mass number 120 contains
A. 48 protons, 48 electrons, and 72 neutrons
B. 72 protons, 48 electrons, and 48 neutrons
C. 120 protons, 48 electrons, and 72 neutrons
D. 72 protons, 72 electrons, and 48 neutrons
Option 5
Answer:
a
Explanation:
proton remains same as the atomic number
electron remains same as the atomic number
Mass no.- atomic no. = Neutrons
How many chiral carbon atoms are present in a molecule of 2,3,4-trichloropentane?
Answer:
The answer is 2.
Explanation:
a bottle of water contains 20 oz of water. 1oz is equal to 29.57 milliliters. determine how many millimeters are in the bottle of water
Answer:
591.471 MILLIMETERS
Explanation:
Formula
for an approximate result, multiply the volume value by 29.574
29.574*20=591.471
If you think this has helped you please consider brainly, thank you, or rate.
Miss Hawaii ; )
Which of these is known as a push or pull upon an object that results from its interaction with another object?
Answer:
b
Explanation:
Answer:
force or velocity
Explanation:
I am not sure
Which of the following animals is not a first-order prairie consumer? help fast
hawk
gopher
deer
squirrel
Answer:
The answer would be the hawk.
Explanation:
First-order consumers directly depends on grass or plants for survival.
A hawk gets its food from eating animals.
Again, hope this helps :D
aluminum can be used to make soft drink cans because of which property?
A. It can be hammered into a thin sheet (malleability)
B.it can reflect light (shininess)
C.It can be drawn into long wires(ductility)
Answer:
A
Explanation:
Malleability describes the property of a metal's ability to be distorted below compression. It is a physical property of metals by which they can be hammered, shaped and rolled into a very thin sheet without rupturing. A soda can's walls are very thin, and therefore express the malleability of aluminum.
