Which two statements describe a claim that is based on science?
A. It is based on logical reasoning.
B. It is based on empirical evidence.
C. It is based on personal bias.
D. It is Based on a long tradition.
Answer:
A AND B
Explanation
Personal bias and tradition have nothing to do with true scientific CLAIMs. We reach the truth by careful observations and logical reasoning (see Sherlock Holmes).
so
A AND B
1. The heat of combustion is a negative value. Do you think this indicates an exothermic or endothermic reaction? Explain.
Answer:
Exothermic
Explanation:
Combustion reactions are almost always exothermic because it is an oxidation reaction that produces heat and in this case it would be considered to be exothermic but there are few cases in which it would be considered endothermic. Combustion of Nitrogen is endothermic because Δ is positive despite being a combustion reaction.
What role do insects play in the fertilization process?[Bees]
AThey transport seeds from trees to the groundincorrect answer
BThey collect nectar from the interior parts of plantsincorrect answer
CThey deliver pollen from the stamens of plants to the ovaries of other plantsincorrect answer
DThey eat fruit, exposing the seeds so that they can sprout and grow
Answer:
C. They deliver pollen from the stamens of plants to the ovaries of other plants
Explanation:
hope this helps :)
How many molecules are there in 3.1 mol CO2
Answer:
Abs : 1.8662 × 10^24
Explanation:
1 mol of CO2 contains 6.02 × 10^24 molecules
So, 3.1 mol of CO2 contains 6.02 × 10^24 × 3.1 mol = 1.8662 × 10^24
Darwin observed __________________ types of mockingbirds and finches lived in different island environments.
Answer:
Darwin observed many different types of mockingbirds and finches lived in different island environments.
To form a charge of +2 an atom must________electrons.
To form -3 it must ________ electrons.
Multiple choice:
1) gain2 ;lose 3
2) gain3: lose2
3) lose2;gain3
4) lose3; gain2
Answer:
Explanation:
3
the elements on the periodic table are arranged in order of increasing
Answer:
atomic number
Explanation:
If you have a ring that contains 1.94 g of gold, how many atoms of gold are there in the ring?
1) Calculate the average speed in meters/minute for the trip represented
by the walk graphed here.
e
A) 0.5m/min
B) 1m/min
C)
5m/min
nber as you
D) 30m/min
has only
quantity and has
2) What is the average velocity of the person taking this walk?
Answer:
in physics we never work with minutes only seconds.
What is the relationship between the concentration and the rate of the reaction?
negative
neutral
positive
Answer:
When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases. When the concentration of a reactant decreases, there are fewer of that molecule or ion present, and the rate of reaction decreases.
Answer:
Negative
Explanation:
Explain how you can find the number of neutrons in the isotope nitrogen-16
Answer:
9
Explanation:
Nitrogen-16
Atomic number of nitrogen= 7
electrons=7
protons=7
neutrons= ?
Nitrogen-'16'= 16 means the mass
16-7= 9
There are 9 neutrons in Nitrogen-16
the primary difference between enhancers and promoter-proximal elements is that enhancers _____.
Answer:
Enchancers are transcription factors
I hope that helps you
A compound is 2. 00% H by mass, 32. 7% S by mass, and 65. 3% O by mass. What is its empirical formula? The third step is to calculate the mole ratios of the elements present. To do this, you will divide each molar amount by the smallest molar amount. The molar amounts of the elements present are:.
Vinegar is an ingredient commonly used by chefs. Scientists also use it as well, although they call it acetic acid. When vinegar is in its liquid or solid (frozen) states, it has a fixed volume. But when vinegar is in its gas state, it takes up the entire volume of whatever container it is in. This is why you can smell an open bottle of vinegar the minute you walk into a kitchen, even though you cannot actually see the gas particles!
Which statement best explains why the volume of vinegar gas is changeable as opposed to the fixed volume of its solid and liquid states?
A. Gas particles are always at a higher pressure than solids and liquids.
B. Gas particles are always at a higher temperature than solids and liquids.
C. Gas particles are spaced far apart and can move freely.
D. Gas particles stay close together but can move around each other.
Answer: C
Explanation: Because gas particles are free to move fast where as liquid can move a little but solid cant so it would be C
Hope it helps
EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
(No links plz)
Answer:
Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea.
how many electrons can there be in the 2p subshell?
Answer:
6 possible electron can fit into the 2p subshell
what is the electron configuration of a n3- anion?
Answer:
You can see in the above illustration of the periodic table that N is in Period 4, Group 5A, and p-block. Before reaching N, you will pass through the atomic orbitals 1s, 2s, and 2p. The electron configuration of N3- is N3-: 1s22s22p6 .
Explanation:
How does the space between particles change as energy is added
does The Bohr model of the atom correctly predicts the energy levels of the hydrogen atom, which has a single electron.
Answer:False. The Bohr model correctly predicts energy levels of hydrogen and hydrogen-like atoms.
Explanation:
how might rising atmospheric co2 concentrations lower the ph of the oceans?
Explanation:
As CO2 concentrations rise, excess CO2 is absorbed by the oceans. CO2 in the oceans can react chemically with water to form acid. ... The difference in pH units between two acidic solutions is three.
Please help I will Mark Branlist
please justify and explain aswell
A. ionic (donates an electron to the other atom in the bond)
B. covalent (electrons are shared equally)
C. polar (unequal electronegativity)
hope this helps!
A chemical reaction is when substance are changed into other substances.
True or False
Answer:
True
Explanation:
coz it is when one or more substances are mixed to produce one substance
Answer:
true
Explanation:
when its asking for a chemical reaction its asking for if it changed or had any effects like changing color or having weird effects on things it is mixed with or touches so its true
During an experiment, a canister filled with hot water was added to a beaker filled with cold water. In which direction did the heat energy move?
A) The heat energy moved from the hot water of the canister into the cold water of the beaker.
B) The heat energy moved from the cold water of the beaker into the hot water of the canister.
Equal amounts of heat energy from each container moved in both directions
D) No heat energy moved, as it all remained in the canister of hot water.
Answer:
A
Explanation:
As per the concept of thermal energy, heat energy will be moved from hot water of canister to cold water of beaker as heat flows from point at high temperature to point at lower temperature.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.
Learn more about thermal energy,here:
https://brainly.com/question/3022807
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What is the best way to torture an ant
strong salt solution
normal salt wouldnt work becaue unlinke slugs they have a waterproof skin
please help me with the second image questions it is really important and I really need it please help me out and provide me the answers for the second image two questions, looking at the first image please.
Answer:
is this exam.. are you coping..
A. An atom neutral (one with 0 extra charge)?
Answer:
Neutron is the correct answer.
Which ion has the correct charge?
07-
Na 2+
N 3+
Ca2+
Answer:
Ca(2+)
Explanation:
Sodium (Na) only have one valence electron and will lose it in order to gain a full octet. There will be an unbalance of electrons and protons where there are more protons there electrons. The correct ion formula for sodium is Na (1+).
Nitrogen has 5 valence electrons and will gain three more to gain a full octet. There will be an unbalance where there are more electrons then protons. Nitrogen will form the ion N (3-).
Calcium has two valence electrons and will lose them in order to gain a full octet. There will be an unbalance where there are more protons then electrons. Calcium will form the ion Ca 2+
Therefore, Ca2+ is the ion with the correct charge.
PLEASE HELP ASAP 30 POINTS!!!!
Voltage ______
Question 1 options:
causes current
pushes free electrons around a circuit
is measured in Volts
all of the choices
how long to bring cream cheese to room temperature?
Answer:
about an hour but it might take a little longer it jist depends
(will mark brainliest if ou give me the right answer!!!!)
You observe your friend rub a balloon on their wool sweater and then stick it to the wall. To investigate, you set up an experiment to test whether other objects will respond in the same way when you rub them against a sweater. What is the test variable in your experiment?
A. The number of times you rubbed the object on the sweater
B. The observation that the object sticks to the wall
C. The sweater you use to rub against the objects
D. The type of objects you are testing in the experiment
Answer:
D
Explanation:
BEcause you are testing which objects will stick. Your control variable will be the sweater. And the number of times you rub the object on the sweter will not make it stick. It will make it stick for a longer period.
Answer:
D. The type of objects you are testing in the experiment