Answer:
The reaction rate is defined as the amount of substance that is transformed into a given reaction per unit volume and time.
Chemical reactions happen when _____. a.atoms attract or repel one another b.heat is created by friction c. two or more substances are mixed substances are heated or d.cooled
Answer:
A
Explanation:
If the sun rises at 7:36am and sets at 6:00pm, what times would we use for our data in the 24-hour clock format?
A.
sunrise: 0736
sunset: 1600
B.
sunrise: 0736
sunset: 0600
C.
sunrise: 0736
sunset: 1800
D.
sunrise: 1936
sunset: 0600
E.
None of the above.
What is the mass in grams of 35.5 amu? Enter your answer in scientific notation.
Answer:
5.89X10^-23 g
Explanation:
1 amu is 1.6605X10^-24 g. By multiplying 35.5 amu by 1.6605X10^-24 g / 1 amu, you cancel out the amu and convert to grams: 5.89X10^-23 g
The sexual reproduction of plants occurs through what process? (2 points)
a
Finalization
b
Fermentation
c
Pollen production
d
Pollination
Answer:
Pollination
Explanation: Involves production of male and female. Sexual reproduction is also the flowering of plants.
the color of a mineral streak is often different than its color true or false
4. A new compound X has been made, and a 5 x 10-4 Molar solution of it gives an absorbance of 0.405 at the maximum absorbance of 265 nm. The path length of the UV cell is 0.5cm.
Use Beer’s Law to calculate the Molar Absorptivity coefficient of Compound X at this wavelength, quoting the correct units.
Answer:
1620 cm⁻¹·M⁻¹
Explanation:
Beer's Law states that:
A = ε * b * C
Where A is the absorbance, ε is the Molar Absorptivity coefficient, b is the path length, and C is the molar concentration.
Use the given data:
0.405 = ε * 0.5 cm * 5x10⁻⁴ M
And solve for ε:
ε = 1620 cm⁻¹·M⁻¹
So the Molar Absorptivity coefficient of Compound X at this 265 nm is 1620 cm⁻¹·M⁻¹.
can someone tell me the answer and how to do the problem?
Answer:
is tht wht u want
Explanation:
1 grams Sodium is equal to 0.043497607849056 mole.
Las capas del lecho marino del Mar Mediterráneo cuentan la historia de los cambios ambientales en el hoy desértico norte de Africa desde hace 160.000 años, haciendo uso de la regla de tres simple y notación científica indicar a cuántas décadas corresponde este periodo de tiempo con procedimiento
Answer:
160.000 años corresponde a 16.000 décadas.
Explanation:
Para resolver correctamente el ejercicio debemos plantear la regla de tres simple de la siguiente manera:
1 década equivale a 10 años; A cuantas decadas equivalen 160.000 años?
1 década→10 años
x ←160.000 años
Debemos multiplicar 160.000 por 1 y luego dividir entre 10 ;
x=([tex]\frac{160.000x1}{10}[/tex])=16.000 décadas; en notación científica sería 16x10^3.
Respuesta: 160.000 años corresponde a 16.000 décadas.
Xylem is a plant tissue made up of elongated cells stacked end to end the length of the plant’s stem. Which function is xylem specifically adapted to perform in plants?
A. Help prevent water loss.
B. Exchange gases with the atmosphere.
C. Capture sunlight for photosynthesis.
D. Transport water from roots to leaves.
Answer: Option D.
Transport water from roots to leaves.
Explanation:
This is because xylem is one of the vascular tissues in plants that consist of specialized conducting cells known as treachery elements which transport water and other nutrients from the root to stem and the leaves of plants. It also give physical support to plants or give strength to plants.
Which conditions suggest that a bond will be ionic
if solution conduct electricity then it will ionic bond
Arrange the values according to magnitude greatest to least 8.2*10^—6, 65000, 1.1*10^2, 3.3*10^-2, and 9.0*10^-6.
Answer:
65000 > 110 > 0.033 > 0.0000090 > 0.0000082.
Explanation:
Hello there!
In this case, since those numbers are given in scientific notation, it turns out relevant to express them in standard notation as shown below:
0.0000082
65000
110
0.033
0.0000090
Thus, by arranging them from greatest to least, we obtain:
65000 > 110 > 0.033 > 0.0000090 > 0.0000082
Best regards!
What does electric current measure?
O how well electrical energy moves in a circuit
O how quickly electrical energy moves in a circuit
O how frequently electrical energy moves in a circuit
O how much electrical energy moves in a circuit
Answer:
Explanation:
Electric current in a wire, where the charge carriers are electrons, is a measure of the quantity of charge passing any point of the wire per unit of time. ... Current is usually denoted by the symbol I. Ohm's law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR.
Answer: O how well electrical energy moves in a circuit
Explanation: Electric current is a measure of the flow of charge, as, for example, charge flowing through a wire. Electric current in a wire, where the charge carriers are electrons, is a measure of the quantity of charge passing any point of the wire per unit of time.
Four moles of CO2
a mass of how many grams
Answer: = 17.6
Explanation:
Molar mass of CO2 = 44 g mol-1
Mass of 1 mole of CO2 = 44 g
Mass of 0.4 mole = 44 x 0.4
= 17.6g
Answer:
the answer is 17.6 that's what I got
how do you prepare copper sulphate
What is the change in enthalpy for a reaction if the reactants have 270 kJ of energy and the products have 150 kJ of energy
Answer-150 kj
Explanation:
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Buffers are substances that help resist shifts in pH by Question 10 options: 1) releasing H in acidic solutions. 2) donating H to a solution when they have been depleted. 3) releasing OH- in basic solutions. 4) accepting H when the are in excess. 5) donating H to a solution when they have been depleted and accepting H when the are in excess.
Answer:
5) donating H to a solution when they have been depleted and accepting H when they are in excess.
Explanation:
A buffer solution is a solution that undergoes a negligible change in pH in addition of moderate quantities of acid or alkali. In other words, a buffer solution is one that resists a change in pH on addition or dilution of small amounts of acids or alkalis.
So, from the given question:
Buffers are substances that help resist shifts in pH by donating H to a solution when they have been depleted and accepting H when they are in excess.
Calculate the molar mass:
CsC3H5O3
Answer:
89.0700 g/mol
Explanation:
Hope this helps you out
What is the total number of electrons in the second energy shell of a calcium atom in the ground state
Answer:
8 electrons
Explanation:
The atomic number of calcium (ca) is 20. Therefore,
in the first shell the number of electrons are 2
in second shell the number of electrons are 8
in the third shell the number of electrons are 8
in the fourth shell the number of electrons are 2
electronic configuration in ground state:
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2
Hope it helps u (｡◕‿◕｡)
If Maria winks exactly 5 times every minute while she’s awake and she sleeps exactly 8 hours a day how many times does Maria Wink in a day?
Answer:
192
Explanation:
24-8=16
16x60=960
960/5=192
Which population of frogs will best survive a change in the environment?
Answer:
B
Explanation:
it has the most frogs
A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the
molecules move around each other
What change did the scientist observe in the substance?
A. Before, the substance was a liquid. Later, it was a solld.
B. Before, the substance was a gas, Later, it was a liquid
ООО
C. Before, the substance was a liquid. Later, it was a gas.
D. Before, the substance was
solid. Later, it was a liquid
The change scientist observed has been that before the substance was in gaseous state, and later it was in liquid state. Thus, option B is correct.
The particles in the different state of the sample has been moving with varying speed and have varying interatomic interactions. The interactions have been changed with the change in the state of matter.
In the solid state, the structure of particles has been very compact, and the particles do not have a particular movement.The liquid sample has been constituted of the sample particles with lesser interatomic interactions. The particles move more freely compared to the solid, around each other.The gaseous particles have been constituted of the least interatomic particle's interaction. The particles are present at a distant and move away from each other.The sample with the scientist has prior movement of the molecules away from each other. Thus, the substance has been present in the gaseous state. The later movement of the samples has been around each other, thus the molecules has been in a liquid state.
The change scientist observed for the substance has been from gaseous state to liquid state. Thus, option B is correct.
For more information about movement of molecules, refer to the link:
https://brainly.com/question/2284581
What happens to the chemical energy in methane's bonds
when methane reacts with oxygen and forms H20 and CO,?
Answer: chemical energy is converted to heat and light energy
Explanation: exothermic reaction
4CH3+7O2–>6 H2O+4CO2+energy
what element has 1 proton, 1 neutron, and 2 electrons?
Answer:
Tritium
Tritium is a hydrogen isotope consisting of one proton, two neutrons and one electron. It is radioactive, with a half-life of 12.32 years.
Explanation:
hope it helps :)))
The element which possess one neutron, one proton and two electrons is helium, He. The atomic number of helium is 2 in periodic table and have a mass number of 4 also.
What is helium ?Helium is second element in the periodic table. It is a noble gas and thus unreactive because its valence shell is completely filled and thus helium is placed in the noble gas group 18.
Atomic number of an element is number of electrons in it. For a neutral atom the number of electrons and protons are equal. Thus, all the positive charges is neutralised by equal number of electrons.
Neutrons have no charge and thus, they are neutral. Atoms forms positive ions when number of protons dominate and they will form negative ions if they gain electron and thus number of electrons dominates.
The sum of number of protons and neutrons is called mass number of the element. Helium contains 2 neutron and 2 oproton, thus its mass number is 4 and its atomic number is two.
To find more about helium, refer the link below:
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Which element is malleable and ductile?
A. Phosphorus
B. Argon
C. Sodium
D. Chlorine
Can you help me answer all of these I’ll mark brainliest
Answer:
C.) Sodium
Explanation:
Sodium is an "Alkali Metal"
How many moles of magnesium (Mg) are there in 96.3 g of Mg?
Explanation:
number of moles = m/Mr and the process is in the picture
Which of the following was a major goal of the National Association for the Advancement of Colored People when it
was formed in 1909?
to end integration
to end segregation
to support black nationalism.
O to support the accommodationist approach
When’s end
Answer:
to end segregation
Explanation:
National Association for the Advancement of Colored People (NAACP), interracial American organization created to work for the abolition of segregation and discrimination in housing, education, employment, voting, and transportation; to oppose racism; and to ensure African Americans their constitutional rights.
To end segregation was a major goal of the National Association for the Advancement of Colored People when it was formed in 1909. Therefore, the correct option is option B.
What is NAACP?
A group of individuals led by W. E. B. Du Bois, Mary's White Ovington, Moorfield Storey, and Ida B. Wells founded the National Association over the Advancement of Coloured People (NAACP) in 1909 as an interracial effort to advance fairness for African Americans. Roy Wilkins and Thurgood Marshall were among the group's leaders.
"To ensure the equal treatment in politics, schools, society, and the economy of the liberties of all persons as to eliminate ethnicity-based discrimination" is its stated objective for the twenty-first century. Political lobbying, public relations campaigns, and legal team-developed lawsuit strategies are just a few of the national NAACP initiatives. To end segregation was a major goal of the National Association for the Advancement of Colored People when it was formed in 1909.
Therefore, the correct option is option B.
To know more about NAACP, here:
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Due to changes in the environment, having lighter-colored fur becomes a
survival advantage in a population of wolves.
What is most likely to happen in the next generation?
Answer:
There will be more light-colored wolves.
Explanation:
Evolution is based off the survival of those with the most advantages in the wild. Since their light coat gives them a survival advantage, they will reproduce more.
Nerve impulses are picked up by a neuron’s:
(1) dendrites
(2) axon
(3) synapse
(4) neurotransmitter
Grasses living in an area have shallow but widespread roots that grab
the ground. They can grow their leaves fast even after losing them.
What can we say about these plants?
Which statement best describes how an electromagnetic motor works?
Electrons are moved through a magnet, creating a circuit. That circuit interacts with a current, moving the
conductor in the orientation of the field
Electrons are moved through a current, creating a circuit. That circuit interacts with a magnet, moving the
conductor in the onentation of the field.
Elections are moved through a circuit, creating a current That current interacts with a magnet, moving the
conductor in the orientation of the field
Electrons are moved through a magnet creating a current. That current interacts with a circuit, moving the
conductor in the onentation of the field
Answer:
electrons are moved through a magnet creating a current. the current instracts with a circuit, moving the conductor in the onentation of the field