b.temperature
in a calorimetric determination, either 1. an exothermic process occurs and heat, q, is negative, indicating that thermal energy is transferred from the system to its surroundings, or 2. an endothermic process occurs and heat, q, is positive, indicating that thermal energy is transferred from the surroundings to the system.
Hey I'm Chloe can you Help me, Thank you :)
What pigment, only present in plants, makes photosynthesis possible?
Answer:
la photosintesis viene de la clorofila de la planta
Which physical property will change if the amount of the sample changes?
Answer:
Extensive Properties
Explanation:
A physical property that will change if the amount of matter changes. Change in which the matter's physical appearance is altered, but composition remains unchanged. Solid is distinguished by a fixed structure. Its shape and volume do not change.
List the three types of heating and describe how the ocean works.
Answer:
TYPES OF HEATING: There are three types of heat transfer: conduction, convection, and radiation.
OCEAN ANSWER: Ocean currents are driven by a range of sources: the wind, tides, changes in water density, and the rotation of the Earth. The topography of the ocean floor and the shoreline modifies those motions, causing currents to speed up, slow down, or change direction.
Explanation:
the answer is basicly the person who answered above me
Explanation:
SOMEONE HELP ME ASAP!!!
Answer:
A
Explanation:
What do the Beluga and the sea duck have in common in the food web?
Answer: they both eat fish
Explanation:
How many moles of water are there in 45 g of water?
a) 1.0 moles
b) 1.5 moles
c) 2.0 moles
d) 2.5 moles
Answer:
d
Explanation:
can you help me with my question In the extended simile of the underlined passage from Paragraph 15 of "A Wagner Matinee," the narrator makes an observation about the soul that aring rokol been A. it is like a strange moss on a dusty shelf that, with excruciating suffering, can wither and die y for I the be B though after excruciating suffering it may seem to wither, the soul never dies, C. excruciating, interminable suffering that goes on for half a century can kill the soul.
Which of the following best describes the difference between metals and nonmetals?
a
metals tend to have low melting points and nonmetals have high melting points
b
nonmetals are more reactive than metals
c
metals are brittle and dull
d
metals have high melting points and are malleable, whereas, nonmetals have lower melting points and tend to be brittle.
Answer:
the answer is d.
Explanation:
because metals are refers to natural elements that are hard, shiney, opaque, and dense. nonmetals implies thise chemical substances that are soft, non-shiney, transparent and brittle.
Facts about flooding
Answer:
No region is safe from flooding. All 50 states are subject to flash floods.[1]
Flash floods can bring walls of water from 10 to 20 feet high.[2]
A car can be taken away in as little as 2 feet of water.[3]
To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.[4]
Flooding is caused by spring thawing (snow and frozen grounds melting in the spring), heavy rains, snow melt runoffs, flash floods, and mudflows.[5]
Floods are the most widespread natural disaster aside from wildfires. 90% of all U.S. natural disasters declared by the President involve some sort of flooding.[6]
In preparation for a flood, it is important to stock up on first aid items, non-perishable foods, 3 gallons of water per person for 3 days, battery operated radio for weather reports, extra batteries, personal hygiene necessities.[7]
Based on Floodsmart, a 2,000 square foot home undergoing 12” of water damage could cost more than $50,000.[8]
Since flood damage is almost never covered by homeowners insurance, flood insurance is important for people living in high-risk flood zones.[9]
To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.[10]
Communities particularly at risk are those located in low-lying areas, near water, or downstream from a dam.[11]
Why are most anions basic in H2O? Give formulas of four anions that are not basic.
Answer:
The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.
Explanation:
if water is added to a 0.70 molar solution of CuSO4 what will change
A. molarity will increase
B. Molarity will decrease
C. the amount of CuSO4 will decrease
D. No change in molarity or amount of salute
Answer:
B. Molarity will decrease
Explanation:
Molarity is one of the measures of the molar concentration of a solution. It is calculated by dividing the number of moles of the solute by the volume of the solvent. This means that the higher the amount of solute in relation to the volume of solvent, the higher the molarity of that solution.
In essence, adding water to a solution dilutes it i.e it increases the solvent's volume in relation to the solute, causing the molarity to decrease. In a nutshell, diluting a solution (by adding water or more solvent) causes the molarity of such solution to decrease. For example, if water is added to a 0.70 molar solution of CuSO4, the molarity of the solution will DECREASE.
Why is ionic bonding considered a bond type and an attractive force?
Answer:
Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another. This exchange results in a more stable, noble gas electronic configuration for both atoms involved. An ionic bond is based on attractive electrostatic forces between two ions of opposite charge.
Explanation:
If 0.700 moles Ag is reacted with 10.0 g S, is sulfur or aluminum the limiting reactant?
Answer: [tex]S[/tex] is the limiting reagent
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} S=\frac{10.0g}{32g/mol}=0.3125moles[/tex]
[tex]\text{Moles of} Ag=0.700moles[/tex]
[tex]2Ag+S\rightarrow Ag_2S[/tex]
According to stoichiometry :
1 mole of [tex]S[/tex] require = 2 moles of [tex]Ag[/tex]
Thus 0.3125 moles of [tex]S[/tex] will require=[tex]\frac{2}{1}\times 0.3125=0.6250moles[/tex] of [tex]Ag[/tex]
Thus [tex]S[/tex] is the limiting reagent as it limits the formation of product and [tex]Ag[/tex] is the excess reagent.
the firm outer covering of a plant cell is a
A.cell body
B.cell membrane
C.cell wall
d.cell structure
Answer:
it is the cell wall :)
Explanation:
Answer: The answer is C
Los termómetros de mercurio no pueden medir temperaturas menores a -30oC debido a que a esa temperatura el Hg
se hace pastoso. ¿Podrías indicar a qué temperatura Fahrenheit y Kelvin corresponde?
Answer:
243.15 K y -22 F
Explanation:
Para convertir la temperatura desde grados Celsius (°C) a kelvin (K) se debe sumar 273.15 K:
K = °C + 273.15 = -30°C + 273.15 K = 243.15 K
Para convertir desde grados Celsius (°C) a Fahrenheit (F), se multiplica por 9/5 y se suma 32, como sigue:
F = (9/5 x °C) + 32 = (9/5 x (-30°C)) + 32= -22 F
Por lo tanto, una temperatura de -30°C corresponde a 243.15 Kelvin y -22 grados Fahrenheit.
I have 8 valence electrons, completely nonreactive, and my family contains Helium that is used to fill balloons! I must be a...
a
metal
b
nonmetal
c
metalloid
d
noble gas
Answer:
Noble gas
Explanation:
Noble gases are complete octets ( have 8 valence electrons) Helium is a member of this family.
During the combustion of methane (CH4), one mole of methane gas combines with two moles of oxygen gas (O2) to produce one mole of carbon dioxide gas (CO2) and two moles of water vapor. Which of the following chemical equations correctly represents the combustion of methane described above
Answer:
CH4(g) +2O2____ CO2(g) +2H2O (l)
What is T in the equation G = H - TS?
A.
The temperature in kelvins at which the reaction is happening
B.
The temperature in degrees Celsius at which the reaction is run
C.
The temperature required to make the reaction spontaneous
D.
The temperature at which the Gibbs free energy is zero
The answer is A.
The T in the equation G = H - TS is the temperature in kelvins at which the reaction is happening. The correct option is A.
What is temperature?Temperature is the measurement of the coldness or hotness of a body. The SI unit of the temperature is kelvin and Celsius. The high-temperature regard hotness and the low temperature means a cold area.
G = H – TS is the equation to calculate Gibbs free energy.
Where G = Gibbs free energy
H = enthalpy
T = temperature
S = entropy
Gibbs free energy is the total amount of energy that is taken to do the work in a closed system. The entropy is the total amount of energy that is not useful for work. The temperature is the variable in this equation.
Thus, the correct option is A. The temperature in kelvins at which the reaction is happening.
To learn more about temperature, refer to the link:
https://brainly.com/question/4002787
#SPJ2
15g of sugar and 10g of water are measured separately. The sugar is dissolved in the water. What will
the mass of the solution be?
Answer: a) No, both are different.
b) Ramesh- 9.9%
Sarika - 10%
Explanation:
According to the solution prepared by Ramesh,
Mass of sugar he took (Solute) = 10 g
Mass of water he took (Solvent) = 100 g
Thus Mass % of the solution =
According to the solution prepared by Sarika,
Mass of sugar she took (Solute) = 10 g
Mass of Solution she took = 100 g
Thus Mass % of the solution =
Explanation:
A solution of 1.8274g of a polypeptide in 274mL of a aqueous solution has an osmotic pressure at 31.40 degrees C of 2.012 mmHg. The approximate molecular weight of this polymer is _____ g/mol.
Answer: Hence, the approximate molecular weight of the poymer is 64106 g/mol
Explanation:
[tex]\pi=CRT[/tex]
where,
[tex]\pi[/tex] = osmotic pressure of the solution = 2.012 mm Hg = 0.0026 atm
i = Van't hoff factor = 1 (for non-electrolytes)
Mass of solute (polypeptide) = 1.8274 g
Volume of solution = 274 mL
R = Gas constant = [tex]0.0821Latm/Kmol[/tex]
T = temperature of the solution = [tex]31.40^0C=(273+31.40)K=304.4K[/tex]
Putting values in above equation, we get:
[tex]0.0026=\frac{1.8274 g\times 1000}{M\times 274ml}\times 0.0821\times 304.4[/tex]
[tex]M=64106g/mol[/tex]
Hence, the approximate molecular weight of the poymer is 64106 g/mol
More points
p.s i gave points like 7 times already.... lol
hope it helps though
Answer:
lol we appreciate you!!
Explanation:
thank you
In words, how does the volume change when the temperature of an object changes?
What is this what is this
Answer:Attemted Failed
Maybe try to search
In a different way like:
what is the ingredient of cake
Instead of
how to make Cake
The gravitational force between two masses is proportional to
A.
the difference between the masses.
B.
the first mass divided by the second mass.
C.
the product of the masses.
D.
the sum of the masses.
Answer:
D.
the sum of the masses.
Explanation:
When you have a molecule that has one side with access to electrons, and one side that is deficient in electrons, a(n) ______ forms.
A. Bonds
B. Ion
C. Dipole
D. Charge
Only respond if you actually know the answer!!!
Answer:
C. Dipole
Explanation:
When a molecule is unevenly charged but overall neutral, for example, one atom has a negative charge, and one has a positive charge, they balance each other out when they bond and are known as a polar molecule. Dipole just means 2 poles (positive and negative).
if I can, I'll give branliest
How many valence electrons does this atom have?
Answer:
this atom has 7 valence electrons.
Explanation:
Characteristics of a substance that describe its' ability to change into a different substance are called?
What is the definition of an Arrhenius acid?
Answer:
B. An Arrhenius acid increases [OH–] in the Solution
Answer:
An Arrhenius acid increases [H+] in the solution.
Explanation:
i just took the test and this was the answer-
Question number 12 I need help
Answer: Its B.
Explanation:
i cant quite explain
If the knot (W) travels 2 meters in 1 second, we say it has a _____ of 2 m/s.
Answer:
we say it has a speed of 2m/s
Which statements correctly describe the human skeletal system?
O A. The skeletal system produces red blood cells.
B. Once made, bones become solid structures.
OC. Adult bones are made of non-living materials only.
D. There are many kinds of joints.
OE. Joints are bones that can bend.
Answer:
A
Explanation:
Well, the human skeletal system produce red blood cells into and for the body.