Answer:
carbon dioxide is a gas so it isn't collected over water.
Explanation:
it works for insoluble gases such as hydrogen,or gases that do not dissolve easily in water such as ammonia and chlorine are readily soluble in water and are not collected this way.
hope it is helpful for you.
PLEASEE ANSWER FASST
how do I explain chromotography without memorizing
this is what i usually do -
watch videos based on the topic and take notesread articles based on the topic watch documentaries based on the topicthis is what works best for me it may work different for you but using these methods i'm able to do well on tests without really memorizing much
hope that helps :)
Answer:
its good
Explanation:
it's great vsvhebejehsdhdbehhebehdbeh
How many penicillin molecules would you have if you had a total of 36 hydrogen atoms? What would be the total atomic mass?
Answer:
Explanation:
Molecular formula of penicillin = C₁₆ H₁₈ N₂ O₄S
No of hygrogen atoms = 36
No of molecules = 36 / 18 = 2
molecular weight = 334 amu
molecular weight of 2 molecules = 334 x 2 = 668 amu.
What is the name of alkane having seven carbons atoms in the chain????
Answer:
n-heptane is your answer
Answer:
Hence, C5H12 is called pentane, C6H14 is called hexane, C7H16 is called heptane and so forth. Straight-chain alkanes are sometimes indicated by the prefix n- (for normal) to distinguish them from branched-chain alkanes having the same number of carbon atoms.
Explanation:
Which of these is a property of a substance that is composed of atoms that are held together by metallic bonds?
It has a low melting point.
It can be flattened and bent.
It cannot be shaped into wires.
It does not conduct electricity.
Answer:
B: it can be flattened and bent
Explanation:
Metals are malleable and can be flattened. Metals are ductile and can be deformed and bent.
Metals are bonded together by metallic bonds.
Hence a substance that is composed of atoms that are held together by metallic bonds can be flattened and bent.
The property of a substance that is composed of atoms that are held together by metallic bonds is it can be flattened and bent
What is metallic bond ?Metals are malleable, ductile substance can be deformed when it is bent down, theses are bonded by metallic bond and can be flattened.
The metallic bond is a force of attraction which is responsible for holding the atoms together, releases electrons to achieve the configuration of a noble gas.
in this type of bonding all the atoms lose their electrons from their outermost layers that move more or less freely between them, forming an electronic cloud
The metallic bond is the exceptional bond where the electrons are not present exclusively between a pair of atoms, but these are relocated among millions of them called as "sea of electrons" by cohesive bond.
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Mutations are changes in the genes of living things. Mutations are common in all life forms and usually harmless. In fact, sometimes they help organisms survive. However, people often think that the word mutation means something dangerous. Which best describes the question "Why do most people think mutations are dangerous?" a scientific question, because it asks about mutations that happen in nature a scientific question, because it asks about most people instead of just a few not a scientific question, because it asks about what people think instead of how nature works not a scientific question, because it asks about how mutations can be helpful to life in nature (ANSWER IT FIRST AND GET BRAINLIST)
Answer: A
Explanation:
Answer:
C
Explanation:
What is the term for a ratio of equivalent measurements that can be used to change a value from one until into another
Answer:conversion factor
Explanation:
Hail is an example of which type of phase change?
A) Sublimation
B) Evaporation
C) Condensation
D) Freezing
Answer:
D) freezing
Explanation:Because hail sounds like it is hard and hail comes down and it hurts because it is freezing.
The hail can be defined as the conversion of the water to the ice. Thus, hail is an example of freezing.
What is phase change?The phase can be defined as the state of the matter. With the change in the temperature and the pressure values, the state of the matter, or the phase changes.
The hail has been the solid precipitation of the rain water. With the lowering of the temperature to the critical pressure, the water converts to ice.
The conversion of water to ice has been termed as freezing, Thus, hail is an example of freezing. Hence, option D is correct.
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difference between compound and element
Answer:
An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
Explanation:
I hope it helped you
What is the mass of a liquid having a
density of 1.40 g/mL and a volume of
3090 mL?
Answer:
It has a mass of 4.326 grams.
Explanation:
Define and give 3 examples of psychical properties
Answer:
A physical property is any property that is measurable, whose value describes a state of a physical system.
Explanation:
-color
-density
-volume
The total number of protons and neutrons in an atom is its ___________________.
Answer:
nuggets
Explanation:
tazte very good
Answer:
It's atomic number is 2 so it has 2 protons. It's nucleus also contains 2 neutronns so 2+2=4 the answer is 4 in total.
Explanation:
I think. hehe I hope this helps though.
Which of the following is NOT a characteristic of metals?
Answer:
brittle is not a characteristic of medals.
A car travels 350 km in 7 hours. What is the average speed of the car (in km/hr)?
Answer:
50 km/hr
Explanation:
just divide the distance by the time (350/7)
Answer:
50 km/hr
Explanation:
Distance = 350 km
Time = 7 hours
Average Speed = ?
[tex]Average\:Speed = \frac{Distance}{Time} \\\\Average\: speed = \frac{350\:km}{7\:hr} \\\\A.V = 50\:km/hr[/tex]
Which types of native organisms do feral hogs most likely compete with for food sources?
Answer:
Here...
Explanation:
The feral hogs are most likely to compete with Herbivore and Carnivor for food sources. Option C is correct.
Herbivore:It is a type of food habit or nature in which an animal only eats plant or plants derived products.
For example Deer, Cows, etc.
Carnivorous:It is a type of food habit or nature in which an animal only eats other animal or animal-derived food.
For example- Lion, tiger, etc.
Since, feral hogs are omnivores who can eat both small animals and plants,
Therefore, the feral hogs are most likely to compete with Herbivore and Carnivor for food sources.
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a cheetah can run 112km/h over a 100-m distance. what is this speed in meters per second
measure the mass of 1 gram of sand
Answer:
Mass: 1 gram
Explanation:
This question doesn't make sense because the mass would be 1 gram.
Grams are a unit of mass.
What is the force of gravity acting on an object? (3 points)
Velocity
Mass
Weight
Pounds
the answer of these question is weight
solve find the value of x
Answer:
50
Explanation:
2x+5=105
2x=100
2x/2=100/2
x=50
SER
In which direction does the Sun appear to move across the sky?
from west to east
O from east to west
O from north to south
from south to north
Answer:
east to west is the answer
What is the main cause of global convection currents?
Answer:
The main cause of global convection currents is the uneven heating of the earth by the sun. Hope this helped! :)
The main cause of global convection current is differential heating, that is the temperature difference in different levels of atmosphere.
What is convection current?Convection current is the heat transfer by fluid movement in the earth crust between different temperature regions. The density of fluids differs due to the temperature gradients and thus heated fluids raises and cooled fluid sinks.
The heated fluid movement causes the movement of plates of earth. The molten rock deep inside the earth crust circulates by the convection current.
Hence, the main cause of global convection current is the differential heating of the atmosphere.
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Which process is an example of a chemical change? drying clothes in the dryer heating a cup of tea chopping a tree activating a glow stick
What are the charges on simple ions formed from atoms of group 2A elements
Explanation: Atoms in Group 2A have 2 valence electron and lose 2 electron to gain an octet. These cations have +2 charge. Transition Metal Cations Electrons are removed from ns subshell before the (n-1)d subshell Fe atom = [Ar]4s23d6 Fe2+ ion = [Ar]3d6 Fe3+ ion = [Ar]3d5 The 4s electrons have been removed.
Which of the following did federalists oppose?
Answer:
The Federalists felt that this addition wasn't necessary, because they believed that the Constitution as it stood only limited the government not the people
(1 kilometer = 1,000 meters, 1 hour = 60 minutes, 1 minute = 60 seconds) Complete the steps necessary to convert 55 kilometers per hour to meters per second. Min 60 1,000 15.28 100 sec
Explanation:
55 kilometers per hour to meters per second
First we have to convert the kilometers to grams;
1 kilometer = 1,000 meters
This means we have;
55000 meters per hour
Converting hour to seconds;
1 hour = 60 minutes
1 minute = 60 seconds
1 hour = 60 * 60 = 3600 seconds
We divide 55000 by 3600;
55000 / 3600 = 15.28 meters per second
Explanation:
55 kilometers per hour to meters per second
First we have to convert the kilometers to grams;
1 kilometer = 1,000 meters
This means we have;
55000 meters per hour
Converting hour to seconds;
1 hour = 60 minutes
1 minute = 60 seconds
1 hour = 60 * 60 = 3600 seconds
We divide 55000 by 3600;
55000 / 3600 = 15.28 meters per second
Use the drop-down menus to complete the statements.
The
transports water and nutrients throughout the plant.
The
v transports food throughout the plant.
HELPPPP A S A P!!
Answer:the xylem transports water and nutrients throughout the plant
the pholem transports food throughout the plant.
Explanation:mark brainliest cuz like i gave u the answer lol
Answer:
xylem and pholum
Explanation:i did it on edge hope its right :)
also sorry if i spelled it wrong i have never been the best at grammar
The chemical symbol for silver oxide, an ionic compound used to make button batteries, is made of silver and
oxygen and has a chemical formula of Ag20.
Answer 2 and 1
Answer:
2 Silver Ions
1 Oxygen Ion
Explanation:
Edg2021
The chemical symbol for silver oxide is not Ag₂0. The correct chemical formula for silver oxide is Ag₂O.
Silver oxide (Ag₂O) is an ionic compound composed of silver ions (Ag⁺) and oxide ions (O₂⁻). It is commonly used in button batteries as a cathode material. In this compound, two silver ions combine with one oxide ion to form a stable structure.
The chemical formula Ag₂O indicates that there are two silver ions (Ag⁺) and one oxide ion (O₂⁻) in each formula unit of silver oxide. The subscript 2 after Ag indicates that there are two Ag⁺ ions present, while the absence of a subscript after O indicates that there is one O₂⁻ ion.
Hence, the chemical formulae are discussed above.
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Zn + 2HCl ---> ZnCl2 + H2 1. Is the equation above balanced or unbalanced? How do you know? (Hint: How many atoms of each type of element are there?)
Answer:Balance. Acid+metal->salt+hydrogen.1 molecule od zinc contains 1 zinc atom.2 molecule of HCl contains 2 atoms hydrogen and 2 chlorine.1 molecule of Zncl2 contain one atom of zinc and two atom of chlorine.And two 2 atoms of hydrogen.
Explanation:
Matching
Match the word to the definition. Write the letter on the line.
6. Type Scientfic nquiry
А. This group shows the effect of the variable being tested
7. Type_ Hypothesis
В. This is the one variable that is changed
8. Type Control group
с. A welltested explanation for experimental results
9. Type Experimental group D. The many ways in which scientists study the natural world
10 Type Independent variable E A possible answer to a scientific question
11 Type Dependent variable F This describes an observed pattern in nature
12 Type Scientific theory G This group is left alone and not experimented on
Н This is the veriable that gets measured
13 Type Scientific law
Click to add speaker notes
Answer:
6. Scientific inquiry - D
7. Hypothesis - E
8. Control group - G
9. Experimental group - A
10. Independent variable - B
11. Dependent variable - H
12. Scientific theory - C
13. Scientific law - F
Explanation:
6. Scientific inquiry - D
Scientific inquiry is the study of the explanation for the natural world phenomenon and it requires many scientific steps.
7. Hypothesis - E
A hypothesis is a possible explanation for a phenomenon or problem. It is tested in order to see if true or not.
8. Control group - G
The control group in a scientific experiment is a group of subjects did not get the treatment and left alone.
9. Experimental group - A
The experimental group is another hand group of subjects that gets treatment and shows the effect of the variable being tested.
10. Independent variable - B
Independent variables change or manipulated during an experiment and cause a response from the dependent variable.
11. Dependent variable - H
The dependent variable is a variable that is dependent on independent variables and changes in the independent variable.
12. Scientific theory - C
A well-tested explanation for experimental results with the scientific process.
13. Scientific law - F
This describes an observed pattern in nature
Are all physical reactions reversible?