When we are adding water (or solvent) to a solution to decrease its concentration, we are diluting the solution. When dealing with dilution we will use the following equation:
M1 V1 = M2V2
M1 = initial concentration
V1 = initial volume
M2 = final concentration
V2 = final volume
Calculate the volume of the 1.75 M K2CrO4 stock solution needed
M1 = 0.100 M
V1 = 2.00 L
M2 = 1.75 M
V2 = ?
Remember the equation that I said
M1 V1 = M2 V2
[tex]\frac{M1 V1}{M2} = \frac{M2 V2}{M2}[/tex]
V2 = [tex]\frac{M1 V1}{M2}[/tex]
V2 = 0.100*2/1.75
0.114 L
We would prepare 2.00 L of 0.100 M K2CrO4 from 1.75 M K2CrO4 stock solution by diluting 0.114 L of stock solution to the desired volume of 2.00 L
Good Luck!
what are 7 reasons viruses can be classified as nonliving and 3 for them for being classified as living?
Answer:
Im not sure if they're all right but i hope this helps <3
Explanation:
nonliving:
- it doesn't need to consume energy to survive
- its not able to regulate its temperature
- they replicate by invading living cells
- living things have cells whereas viruses do not
- they aren't made of living cells
- they don't produce waste products
- they don't grow
living:
- they can adapt to their environment
- living things have different levels of organization and so do viruses
- viruses can infect other viruses. If a virus can get sick it should be considered a living thing.
What method could be used to separate the components of gasoline?
Explanation:
The separation of gosoline from crude oil by heating until it reaches its boilling point is a separation technique called fractional distillation .It is the separation of a mixture such oil into their respect fraction.
Answer:
The answer is B, Distillation.
Explanation:
A simulation at the nuclear level has nuclei with 20 protons and 100 neutrons. Alpha particles can get very close to the nuclei.
When the nuclei have 100 protons and 20 neutrons, the alpha particles cannot get as close to the nuclei. The nucleus is the
same size in both scenarios Why does the motion of the alpha particles differ? (1 point)
Neutrons attract the particles, while protons do not.
Neutrons repel the particles, while protons do not
O Protons attract the particles, while neutrons do not.
Protons repel the particles, while neutrons do not.
Alpha particles are constituted of two neutrons and two protons like helium atoms. The motion of particles differs as protons repel, while neutrons do not. Thus, option D is correct.
What are alpha particles?Alpha particles are said to be the radiations that resemble a helium atom in having two neutrons and two protons in their nucleus. They result from the alpha decay of the radioactive elements.
The alpha particle has been constituted of a +2 charge and mass equivalent to the sum of the protons and neutrons which is 4 amu. The protons and alpha particles are positively charged species.
Due to the positive charge on alpha particles, they get repelled by the nuclei containing more protons. Whereas, neutrons do not affect particles as they are neutral and lack charge.
Therefore, in option D. the protons repel the alpha particle.
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The motion of the alpha particles differ because protons repel the particles, while neutrons do not. Option 4 is the answer.
Why the alpha particles act differentlyThe behavior of alpha particles around nuclei is affected by electromagnetic forces arising from the positively charged protons within the nucleus. When the nucleus comprises 20 protons and 100 neutrons, the presence of more neutrons mitigates the repulsion between alpha particles and protons, enabling the particles to approach closely.
Conversely, if the nucleus contains 100 protons and 20 neutrons, heightened repulsion from the greater number of protons hinders the proximity of alpha particles to the nucleus.
Neutrons, with no charge, evade these repulsive forces, allowing them to mediate the interactions and facilitate closer particle approach. In essence, the differing proton-to-neutron ratios influence the motion of alpha particles around nuclei.
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what is mole ? and it's unit
[tex]\\ \sf\longmapsto 1mole\:is\:a\:specific\:amount\:of\:particles\:of\:a\:substance .[/tex]
[tex]\\ \sf\longmapsto It\:is\:Represented\:as\:mol[/tex]
[tex]\\ \sf\longmapsto 1mol=6.023\times 10^{23}particles[/tex]
what is the rest and motion?
Answer:
A body is said to be at rest of it does not change its position with respect to a fixed point taken as a reference point in its surroundings, with the passage of time.
A body is said to be in motion if it's changes its position continuously with respect to a fixed point, taken as a reference point in its surroundings, with the passage of time.
T'challa's ship has a length of 9 meters. Convert this to centimeters. (There are 100 cm per m)
Group of answer choices
Answer:
900cm
Explanation:
9 multiplied by 100 is 900
A loud sound has a large
Answer:
This extra energy causes the string to vibrate more, which helps it move more air particles for a longer time. A string plucked with force has greater amplitude, and greater amplitude makes the sound louder when it reaches your ear. Volume depends on amplitude. Greater amplitude produces louder sounds.
Within atoms, what kind of energy
is stored?
3. Complete the following conversions.
a. 10.5 g =____kg
b. 1.57 km =____m
c. 3.54 ug = ____g
d. 3.5 mol =__ umol e. 1.2
L=____mL
f. 358 cm3 =____m3
g. 548.6 mL =____cm3
I need the answers and how to do it too please. I really need someone’s help
Suggest why sodium and hydrogen ions do not diffuse at the same rate
Answer:
sodium has got ionic bonds that are weak
compared to hydrogen covalent bonds that are strong
An Alkali could have a pH of
A.1
B.5
C.7
D.9
7
Scientists use pH to describe how acidic a substance is on a scale of 0 to 14. By definition, a substance is alkaline if it has a pH of over 7.
mark me as brilliant pls ❤️
Those who answer this I will make as brainliest.
Q. At room temperature, one liter of water can dissolve around 360 grams of salt.How much salt will remain on the bottom of the beaker if 250 grams of salt bedissolved in 580 ml of water as it becomes saturated solution of salt.
Don’t write answer only. Show your working clearly.
Answer: 41.2 grams will remain undissolved
Explanation: The solubility for the salt is 360 g/liter, or 0.36 g/ml. (Based on the word "around" which I take as the limit of solubility).
Thus, if we have 580 ml, (0.36g/ml)*(580ml) = 208.8 grams dissolve.
(250g - 208.8g) = 41.2 grams undissolved.
When separating a mixture using the property of size, which of the following separation methods would you use? A. magnetism B. distillation C. evaporation D. filtration
Answer:
D
Explanation:
The answer is Filtration
When separating a mixture using the property of size, filtration is used in the separation methods would you use. The correct option is D.
What is filtration?Filtration is a process of separating different substances from each other. It is done to separate the different substances from each other. These substances can be solid, gas and liquid.
There are different processes of separation to separate different substances. These processes are magnetism, distillation, evaporation, and filtration.
Magnetism is the process used to separate magnetic substances from nonmagnetic substances. Evaporation is a process of separating the substance from a high boiling point to a low boiling point. Filtration is used to separate using the property of size.
Thus, the correct option is D. filtration.
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Why was the International System of Units chosen?
please answer this soon
Answer: The SI system is easier and more consistent. If the Klingons in the next galaxy know the definitions of metric, they can replicate the measures on their own planet. With English, they'd need to grab a yardstick the next time they did a crop circle.
Explanation: I'll use "SI" for the International System of Units. There are several key benefits;
Unlike the English system, there are base units that form a standard for various measures: length (meter), mass (kg), Time (sec), electric current (Ampere), temperature (Kelvin), amount of a substance (moles), and candela (luminous intensity). A system of prefixes allow the base unit to be easily changed to accomodate larger and smaller quantities. 1,000 grams is 1 kg. 1000 meters is a kilometer (km), etc. In English, it isn't so easy. An English unit of measure may read "1 mile, 34 yards, 2 feet, and 6 and 1/8 inches." In metric it would simply read 1698.5 meters, or 1.698.5 km. Imagine the difference in finding the area of a rectangle in English vs metric: Either 1) 2ft, 3 and 13/16" times 4ft, 8 and 1/16 inches, or 2) 1.833 meter by 2.877 meter.The metric system has standards that allow a high degree of calibration. Distance is calibrated to the speed of light and time is calibrated tio a vibrating atom, for example.What is a triglyceride made out of? Why is it not considered a 'true' polymer?
Good quesetion
Explanation:
i will research and say something
Which of the following are examples of matter? Check all that apply.
A. air
B. light
C. water
D. sound
E. bacteria
F. copper
Answer:
Air, Water, Bacteria, and Copper
Explanation:
air, water, bacteria, copper
Heat cannot be considered as an example of matter because heat is regarded as one of the energies that it's movement is as a result of temperatureSound cannot be considered as matter as well as light. Light can be considered as a propagation that occur through pressure wave and this is through a medium of particles, and sound is a wave, it is not considered a form of matter. Light and sound doesn't have mass as well as weight and Volume and both Light and sound doesn't occupies space and they are considered as not having area.Matter can be regarded as anything which is able to occupies space and that has mass
All physical objects can be considered as been composed of matter, The classical states of matter can be classified as: are solid or liquid or gasTherefore, the examples of matter matter among the given options are: air water, bacteria, copperLearn more at;
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calculate the mass of:
6 moles of sulfur dioxide (SO2) molecules
Answer:
384g
Explanation:
Given in pic.
Have a great day!!
I can lift a 20 kilogram weight over my head ten times before I get tired.
Write this measurement to the correct number of significant figures.
If I lift 20 kilogram weight over my head ten times, then I have lifted 200 kilograms.
According to the question, each of the weight has a mass of 20 kilogram.
I have to lift this weight over my head ten times. Now i want to measure the total weight that i have lifted to the correct number of significant figures.
This now becomes; 20 kilogram * 10 = 200 kilograms.
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Please help! I can’t get any answers!!
Can someone plz help me ? :(
Answer:
C. A persons lost limb can be replaced with an advanced robotic limb
Scientists have cited gas emission as contributing to global [blank] , which is a general increase in temperatures worldwide.
Answer:
Warming
Explanation: Greenhose gases (CO2, CH4, etc.) trap heat in Earth's atmosphere since they absorb wavelenghts of light associated with heat.
what is called the quantity which can be measured ?federal
A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity. Any other quantity of that kind can be expressed as a multiple of the unit of measurement. For example, a length is a physical quantity.
what are saturated hydrocarbons ???
Answer:
they are cyclic aliphatic hydrocarbon and alkanes
Explanation:
the defenition of saturated is that it doesn't react easily or you can say compared to alkenes and alkynes the alkanes doesn't react easily due to lack of pi bonds an only sigma bonds exist
_ is an example of a homogeneous material.
A. Wood
b. Granite
c. Concrete
d. Salt
Answer:
concrete
Explanation:
because it is simply a variety of calcium compounds in a single mixture. when mixed with water and solid substances , it become concrete.
Answer:
salt
Explanation:
Concrete is a heterogeneous mixture.Wood is a heterogeneous mixture.Granite is a heterogeneous mixture.
Approximately how many atoms of hydrogen would be in 1.5 moles of H20?
Answer:
There are two hydrogen atoms per water molecule. There are 6.022x10^23 water molecules per mole.
Explanation:
En la tienda compre una botella con agua la cual no venía etiquetada, ¿Que unidades de medición debe contener la etiqueta para saber la masa de la botella, su volumen y a qué temperatura debe mantenerse?
La unidad de medición para saber la masa de la botella es el gramo.
La unidad de medición para saber el volumen de la botella es el centímetro cúbico o el mililitro o el litro.
La unidad de medición para saber la temperatura de la botella es el grado Celsius.
Inicialmente, vamos a asumir que la botella de agua ha sido comprada en una zona donde las unidades del Sistema Internacional de Medidas es el Sistema Estándar de Pesas y Medidas. En este problema, se requiere conocer tres unidades para la Masa, el Volumen y la Temperatura, cuyas Unidades Fundamentales son las siguientes:
Masa - Kilogramo ([tex]kg[/tex])Volumen - Metro cúbico ([tex]m^{3}[/tex])Temperatura - Grado Celsius ([tex]^{\circ}\,C[/tex])Puesto que la adquisición de botellas de agua en almacenes se realiza en forma Minorista, tanto el Volumen como la Masa, Propiedades Extensivas de la Materia, deben basarse en Unidades Derivadas, es decir, Unidades relacionadas con Unidades Fundamentales mediante relación constante, mientras la Temperatura debe ser una Unidad Fundamental por ser una Propiedad Intensiva de la Materia. Las Unidades más usuales para la botella de agua son:
Masa - Gramo ([tex]g[/tex])Volumen - Centímetros Cúbicos ([tex]cm^{3}[/tex]) o Mililitros ([tex]mL[/tex]) o Litros (L)Temperatura - Grado Celsius ([tex]^{\circ}\,C[/tex])La unidad de medición para saber la masa de la botella es el gramo.
La unidad de medición para saber el volumen de la botella es el centímetro cúbico o el mililitro o el litro.
La unidad de medición para saber la temperatura de la botella es el grado Celsius.
Invitamos a ver esta pregunta relacionada con Unidades del Sistema Internacional: https://brainly.com/question/19388259
How many grams of HNO3 are in 75ml of a 8.0M solution?
Answer:
0.0378g
Explanation:
Keep in mind that M = mass/molar mass * 1000/volume.
8 = m/63 × 1000/0.075
8 = 1000 m/4.725
Cross multiply
37.8 = 1000 m
m = 37.8/1000
m = 0.0378g
A physical change happens when one chemical substance is transformed
into one or more different substances,
True
False
Answer:
False {final answer}
Explanation:
The statement refers only about chemical change and not about physical change. Physical changes happens when substances undergo a change that does not change their chemical composition.
True or false All tools, chemicals, and unknown substances should be considered safe unless explicitly stated on the label.
Photography is an important aspect of documenting a crime scene.
Group of answer choices
True
False
Explanation:
l believe it to be true , so I stand for TRUE
