Answer:
Lithium, Hydrogen, Sodium, or Oxygen, Sulfur, Selenium They are all in the same column. Find three elements in the same family and list them. 4. Oxygen, Carbon, Nitrogen, Aluminum, Silicon, Phosphorous They are all in the same row
Explanation:
What is the phase change in which
a substance changes from a gas to
liquid?
a
Answer:
Usually the answer to this kind of question would be Condensation
Explanation:
You feel me my Guy...
Answer:
vaporization
Explanation:
Which of the following correctly describes a compound? (4 points) a The atoms are bonded together, and the compound has different physical and chemical properties than the individual elements. b The atoms have no set ratio for how the atoms can combine, and they are not chemically bonded together. c The atoms can only combine in fixed ratios, and they retain their individual chemical and physical properties. d The atoms retain their individual chemical properties, and they can only be separated from each other by a chemical change.
Answer: A
Explanation: A compound is defined as two or more different elements bonded together in an ionic or covalent bonding arrangement. Any individual compound has a fixed ratio of it's elements. The elements do not retain their individual chemical properties.
guys please help i need to pass this!!
Answer:
Towards the center of the earth.
Explanation:
That is the gravitational pull for us on earth like we are pulled to the center of earth not the atmosphere high up in the sky hope this helps? I know you can pass this! You got it the fact that you got that far is proof.
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 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.
True or false All tools, chemicals, and unknown substances should be considered safe unless explicitly stated on the label.
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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2003 Q 2 Study the information in the table and answer the questions that follow lon Electronic Ionic arrangement radius Na 2.8 0.095 K K 2.8.8 0.133 Mg? 2.8 0.065 Explain why the ionic radius of K* is greater than that of Na*
Answer:
Hence
potassium (k) is 2,8,8,1
sodium (Na) is 2,8,1
potassium will have a higher Ionic radius than sodium
Explanation:
Ionic radius has a trend
it increases down the group
and decreases across the period
You have samples of the following metals of equal mass, which has the largest volume? Copper, density = 8.92 g/mL Mercury, density = 13.6 g/mL Gold, density = 19.3 g/mL Zinc, density = 7.15 g/mL
Answer: Zinc
Explanation: Zinc has the lowest density. Since density = mass/volume, we can also say volume = mass/density. Given the same masses, the metal with the lowest density would have the largest volume.
The sample is given. The sample which has the largest volume is Zinc, density = 7.15 g/mL.
What is volume?Volume is the space occupied by a three-dimensional object. It is the total space occupied by any object like water, a box, or gas. Volume can be calculated as mass/density.
[tex]\rm{Volume = \dfrac{mass}{density}}[/tex]
Given elements are Copper, density = 8.92 g/mL Mercury, density = 13.6 g/mL Gold, density = 19.3 g/mL Zinc, density = 7.15 g/mL
They all have similar mass, and different density is given; we have to find the volume.
If we take a similar mass, so the element with the lowest density will have the greatest volume, by the rule. We can see that zinc has the lowest density, which is 7.15 g/mL. So, the largest volume will have the Zinc.
Thus, the largest volume containing element is Zinc, density = 7.15 g/mL.
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The respiration rate of a goldfish is measured. The goldfish is then placed in cold water and the respiration rate is measured again
Answer:
so the answer are Tyre and he'll to do
1. What are they key characteristics scientists look for to figure of it something is real science or pseudoscience?
2. What are the five main steps in the scientific method?
3.What is a physical property?
4. What are the two types of physical properties?
Answer:
Among these warning signs are: A tendency to invoke ad hoc hypotheses, which can be thought of as “escape hatches” or loopholes, as a means of immunizing claims from falsification. An absence of self-correction and an accompanying intellectual stagnation. An emphasis on confirmation rather than refutation.oMake an observation.Ask a question.Form a hypothesis, or testable explanation.Make a prediction based on the hypothesis.Test the prediction.Iterate: use the results to make new hypotheses or predictions.3. A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance
4.extensive and intensive properties.
PLEASE MARK ME BRAINLIESTEn 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.
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Which of the following is an
example of a homogeneous
mixture?
A. fruit punch
B. a sandwich
C. a toolbox
Answer:
fruit punch
Explanation:
............
if 3mol of carbon dioxide are used up in the photosynthesis reaction, what mass of glucose will be produced?
Answer:
90g of glucose produce
oops i dont think i meant to do this
example of electrovalent bond
Explanation:
MgCl2, CaCl2, MgO, Na2S, CaH2, AlF3, NaH, KH, K2O, KI, RbCl, NaBr, CaH2 etc.hope it helps.stay safe healthy and happy..calculate the mass of:
6 moles of sulfur dioxide (SO2) molecules
Answer:
384g
Explanation:
Given in pic.
Have a great day!!
Is soapy water water good for plant irrigation (give answer in accordance to chemistry)?
Answer:
soapy water is not good for plants irrigation that is what I learn
Answer:
Soapy water is not good for plant irrigation because soapy water contains sulphate in it which is not good for the development of plants.
Explanation:
hope this helps
What is a triglyceride made out of? Why is it not considered a 'true' polymer?
Good quesetion
Explanation:
i will research and say something
Please help! I can’t get any answers!!
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.
Methane gas that comes out of a bunsen burner contains what type of energy?
A. Light energy
B. Heat/thermal energy
C. Chemical potential energy
D. Electrical energy
Water is an important molecule for life on Earth to exist. Water is known to have unique properties like high heat of vaporization that helps moderate the temperature of the ecosystem. It also has high surface tension and high boiling point. In relation to our topic, what do you think is behind the molecules of water that makes these properties possible? Explain and support your answer.
Hydrogen bonding in water molecules are responsible for the unique properties of water.
Water is a molecule composed of hydrogen and oxygen atoms. Oxygen is highly electronegative. This leads to the introduction of polarity in the O-H bond in water. Hydrogen bonding occurs in a molecule when hydrogen is bonded to highly electronegative atom.
As a result of this polarity and consequent hydrogen bonding due to the hydrogen - oxygen bond, water molecules have several unique properties such as high heat of vaporization, high surface tension and high boiling point.
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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
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 would happen if our intestines were not coiled (twisted) inside our body?
Answer:
If there is a change in the natural shape of the intestines, this can be known as a twisted bowel. A twist in the small intestine is referred to as a volvulus. Twists in the large intestine are known as a colonic volvulus. These abnormal twists or loops can cause an obstruction or other medical conditions which could be fatal. If signs of twisting bowel present, it is important to seek medical attention as quickly as possible.
what discovery was a minor help in the development of the periodic table?
Answer:
In 1932 James Chadwick first discovered neutrons, and isotopes were identified
Explanation:
if an airplane travels a distance of 500km in 5 hours, what id the average speed?
Answer:
[tex]speed = \frac{distance}{time} \\ = \frac{500}{5} = 100 \frac{km}{hours} \\ thank \: you[/tex]
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 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]
