Answers
Related Questions
What does q = 0.75 g x 0.897 J/g•°C x 22°C equal?
Answers
Answer:
14.8005 Joules
Explanation:
This question is describing the calculation for the amount of heat (Q) a substance absorbs or releases. The amount of heat, Q, is calculated using the formula:
Q = m × c × ∆T
Where;
Q = amount of heat (Joules)
m = mass of substance (g)
c = specific heat of substance (J/g°C)
∆T = change in temperature of substance i.e. final temperature - initial temperature (°C).
According to this question, the following expression is given:
q = 0.75 g x 0.897 J/g•°C x 22°C
To calculate this further, this will equal to: 14.8005
This means that the amount of heat, q, absorbed or released by that substance is equal to 14.8005 Joules.
What are the main components in dna
Answers
Find the number of Grams
Show all the steps you did to arrive at your answer.
4.00 moles of Cu(CN)2
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Answer: 462 g
Explanation:molar mass is M= 63.55 +2·(12.01+14.01)= 115.59 g/mol.
Mass m= n·M = 4.0 mol·115.59 g/mol= 462.36 g
Amagnet is passed ten centimeters above a desk. A paper clip resting on the desk begins to move as the magnet passes over it. What could be done to increase the effect of the magnet on the paper clip?
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use a stronger magnet:)))))))))
Which organs are responsible for getting rid of waste from the human body?
Brain and pancreas
Kidneys and bladder
Heart and lungs
Muscles and bones
Answers
Answer:
Kidneys and Bladder is the organ responsible for getting rid of waste from the human body
Answer:
kidney and bladder
Explanation:
the kidney and bladder are the organs responsible for getting rid of waste in the human body
What is the molarity of 42.1 g of AgNO3 dissolved in 1.75 L of solution?
2.31 M
B 0.248 M
C 0.142 M
D 24.1 M
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Where does the energy for almost all ecosystems come from
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The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.
ery active on
riodic table
2
c table
Which one is more reactive out of Fluorine and Chlorine? Why?
A small portion of Modern periodic table (Group 1) is given. Givet
hydrogen along with metals in this
group.
3. Elements of
group 1, 2, 13 are more reactive as we go down in the
table, why?
Modern periodic table is less defective than Mendeleev's periodic
to justify it.
Group-C
eley's per
Mention any three characteristics of Mendeleev's periodic table.
Write down the three drawbacks of Mendeleev's periodic table.
Write down three characteristics of Modern periodic table.
Which group of the periodic table does the element ‘A’ belong to
reactive in between 'B' and 'C'? Give reason.
Element
Electronic configuration
А
2,8,5
B
2,3
C С
2,8,3
Identify the groups of the alkali metals, metalloids and inert g
8
What is the valency of chlorine and neon? Why?
2
13
14
15
16
17
Answers
Elements are more reactive as you go down the periodic table because ionization energy decreases down a group which means they can lose electrons more easily, making them more reactive.
The modern periodic table is arranged by atomic number rather than atomic mass, and many discoveries of new elements have been made that make a more complete table.
The vertical columns and horizontal rows in Mendeleev’s table are called groups and periods respectively. There are seven periods and eight groups. Elements with the same properties are in the same group and all elements were ordered by atomic mass.
Three drawbacks of Mendeleev’s table are: it’s arranged by atomic mass rather than atomic number. Isotopes violate Mendeleev’s periodic law. Mendeleev could not figure out where to place hydrogen.
Modern periodic table is arranged by atomic number, it has 7 periods and 18 groups, and is divided into 4 blocks (s-, p-, d-, and f-)
Difference between electro positive and electronegative radical
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Answer:
Here's your answerExplanation:
The key difference between electropositive and electronegative radicals is that electropositive radicals are radical compounds having the capacity to electrons and carry a positive charge whereas electronegative radicals are radical compounds having the capacity to gain electrons and carry a negative charge.
I hope it's helpful for you
what gives bases their properties?
Answers
What is the best option?
Answers
What happens to red litmus paper when it touches a household cleaner
that has ammonia in it, and why?
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Answer:
It will turn blue
Explanation:
Its chemical formula is NH3, and anything that touches that dissolves into a blue liquid!
Hope I helped!
Can y’all help me with this
Answers
Oxidation state of Ruthenium?
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Answer:
0 to +8, and −2
Explanation:
Answer:
In addition to carbonyl and organometallic compounds in the low oxidation states −2, 0, and +1, ruthenium forms compounds in every oxidation state from +2 to +8. Very volatile ruthenium tetroxide, RuO4, used in separating ruthenium from other heavy metals, contains the element in the +8 oxidation state.
Valence: 1, 2, 3, 4, 5, 6, 7, 8
Melting point: 2,250° C (4,082° F)
and the most stable oxidation state of ruthenium is +8
What is the name of this molecule?
Answers
Answer: The answer is either A or C. I'm leaning more towards A.
Answer:
I think its C :)
I really need help please and thank -you which two countries has dominated space exploration during the space race from 1955 to 1975
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can i have brainliest?
Please answer all questions on sheet
Answers
Answer:
Yes you always only see one side of the moon
The moon flag always points towards earth
It take 1 month for the moon to orbit the earth
It takes 29.5 days for the flag to rotate once in a full circle
Please Help me with number 4 I really need help please just tell me which letter is
Answers
Answer:
4. D
Explanation:
Matter can exist in three states namely: solid, gas and liquid. These three states are individually unique because they possess different properties or characteristics. Matter consists of particles, which behave differently in the different states.
Particles of a liquid e.g water, ethanol etc. will move freely about in the container it is placed but in close contact with one another. This means that the particles move freely while still attached to one another. This accounts for the reason liquids are said to FLOW.
how do you use subscripts and coefficients to determine the number of atoms in a molecule.
Answers
Answer:
To find out the number of atoms: MULTIPLY all the SUBSCRIPTS in the molecule by the COEFFICIENT. (This will give you the number of atoms of each element.)
Explanation:
PLS HELP!!!!!! JENSSN
Answers
Answer: I'm not sure but I thinks its C
Explanation:
1.8 mol HCl and 3.3 mol NaOH react accord- ing to the equation HCl + NaOH −→ NaCl + H2O . Calculate the amount in moles of NaCl formed. Answer in units of mol.
Answers
Answer:
1.8 moles of NaCl must be produced.
Explanation:
Based on the reaction:
HCl + NaOH → NaCl + H2O
1 mol of HCl reacts with 1 mol of NaOH to produce 1mol of NaCl
To solve this question we must find, as first, the limiting reactant:
1.8 moles of HCl will need 1.8 moles of NaOH for a complete reaction (Ratio of reaction 1:1). As there are 3.3 moles of NaOH,
HCl is limiting reactant
When the 1.8 moles of HCl react completely,
1.8 moles of NaCl must be produced because 1 mole of HCl produce 1 mole of NaCl
What is Hess's law?
A. Hess's law states that the enthalpy of a reaction changes with
temperature
B. Hess's law states that the enthalpy of a reaction does not depend
on the reaction path.
C. Hess's law states that only changes in enthalpy of a reaction can
be known.
D. Hess's law states that the enthalpy of a reaction depends on the
reaction path
Answers
Answer:
B. Hess's law states that the enthalpy of a reaction does not depend
on the reaction path.
Explanation:
When the wave passes through the medium
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Answer: hewo, there! your answer is Below
A single disturbance passing through a medium is called a pulse.
Explanation:
When the disturbances are repeated in a periodic manner, the pulses generate a continuous wave. Longitudinal waves (also called compression waves – a slinky pushed and pulled) – moves parallel (same direction) to the wave motion.
Hope this helps !!
Have a amazing day !!!!
Answer:
When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particles of the medium move. The distance the particles move is measured by the wave's amplitude.
Explanation:
A single disturbance passing through a medium is called a pulse. When the disturbances are repeated in a periodic manner, the pulses generate a continuous wave. Longitudinal waves (also called compression waves – a slinky pushed and pulled) – moves parallel (same direction) to the wave motion.
The Texas Hill Country ecosystem supports a variety of organisms. Animals such as owls, coyote, snakes and hawks compete for small animals for food. What might happen if the population of these predators became too large? The predators would share the prey population equally among all of the predator species. The predators would begin to eat plants rather than their usual prey. The predators would have more offspring of great size. The predators would consume the prey population faster than it could be replaced.
Answers
Answer:
The predators would consume the prey population faster than it could be replaced.
Explanation:
According to Oxford dictionary; an ecosystem is "a biological community of interacting organisms and their physical environment."
An ecosystem is a self supporting unit that is composed of living and non living parts. The ecosystem should be self sustaining.
In the particular case mentioned in this question, when the predator population becomes so large, they will steadily diminish the prey population faster it can be replaced thereby distorting the balance of the ecosystem.
PLZ HELP ME!! NEED ANSWER ASAP!!! I WILL GIVE BRAINLIST!!!
PLZ ANSWER CORRECTLY.
Picture is below and Thank you
What do the unstable isotopes have in common?
Select one:
a. more protons than neutrons
b. an odd number of protons
c. more neutrons than protons
d. an odd number of neutrons
e. an odd number of electrons
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Answer: c. more neutrons than protons
Explanation: i just took the quiz haha
Increase the coefficient for NH3. Look at
the balance labeled "H" (for hydrogen).
Why are there now 3 hydrogen atoms on
the right side of the balance but 0 on the
left side?
Answers
Answer:
I don't know please you tell me just joking
On an as yet undiscovered planet, the atmo-
sphere is composed of a mixture of 79% argon
and 20% oxygen (volume percentage) along
with trace amounts of other gases, including
CO2, Kr, and Ne. An enterprising student on
that planet wishes to sell the equivalent of he-
lium balloons to small children. Heliun is not
available.
Which of the gases
1) krypton
II) carbon dioxide
III) methane
IV) propane
V) nitrogen
VI) carbon monoxide
would be an acceptable replacement so that
the balloons will float in that atmosphere?
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Answer:
7 and carbon dioxide good luck with the answer
please what is catalyst
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Answer:
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
"chlorine acts as a catalyst promoting the breakdown of ozone"
Explanation:
your welcome!
what do elements and molecules have in common
Answers
Explanation:
When elements combine, they form molecules. Simply put, a molecule is a group of two or more atoms chemically bonded together.
Name the following compound: C2Cl6