Answer:
The bond between Phosphorus and Chlorine in PCl3 is covalent as chlorine needs one electron and phosphorus has metallic character and easily donate electron
which of these gaseous elements is least reactive hydrogen helium nitrogen or oxygen
Answer: Nobel gases
i dont know what the options were but i hope that helped
4. How are isotopes of the same element different? Select all that apply.
[]They have different masses.
[]They have different numbers of electrons.
[]They have different numbers of neutrons.
[]They have different numbers of protons.
[tex]\huge \bf༆ Answer ༄[/tex]
The Correct choice is ~ A
Isotopes are the elements with same Atomic Number but different masses ~
¿Cómo pueden los padres pasar a sus
hijos rasgos como el color de ojos?
Answer:
Los padres transmiten rasgos o características, como el color de ojos y el tipo de sangre, a sus hijos a través de sus genes. Algunas condiciones de salud y enfermedades también pueden transmitirse genéticamente. A veces, en
What is the mass of an atom with 15 protons, 13 neutrons, and 14 electrons?
Answer:
Silicon (Si)
Explanation:
Add the protons and neutrons mass to get the nucleus mass. Then you get number 14 and 28. looking at the periodic table we can see this matches silicon's atom mass and electron number
Answer the following;
Pls helppp
Answer:
The answer is A
Explanation:
Answer:
D)All of the above
A sample of tin (Cp = 0. 227 J/g•°C) is placed in a freezer. Its temperature decreases from 15. 0°C to â’10. 0°C as it releases 543 J of energy. What is the mass of the sample? Round your answer to three significant figures. G.
Taking into account the definition of calorimetry, the mass of the sample is 478.41 grams.
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
Q= -543 J because the energy is releasesc= 0.227 [tex]\frac{J}{gC}[/tex]m= ?ΔT= Tfinal - Tinitial= 10 C - 15 C= -5 CReplacing:
-543 J= 0.227 [tex]\frac{J}{gC}[/tex]× m× (-5 C)
Solving:
[tex]m=\frac{-543 J}{0.227 \frac{J}{gC}x(-5 C)}[/tex]
m=478.41 grams
In summary, the mass of the sample is 478.41 grams.
Learn more about calorimetry:
brainly.com/question/11586486?referrer=searchResults brainly.com/question/24724338?referrer=searchResultsPlease help me with this three questions
Answer:
1. A. Thyroid Gland Function
B. detecting Blood Clots
C. Treating Cancer
2. An example would be how many are used as tracers for diagnostic purposes
3. Beneficial because it gives us ways to eleminate pests, by the sterile insect technique
Number three is kinda iffy a bit difficult to explain it may be explained better in your book.
What type of chemical reaction is Al + FeO --> Al2O3 + Fe
Answer:
single reaction equation
Explanation:
Type of Chemical Reaction: For this reaction we have a single replacement reaction. Balancing Strategies: In this single replacement (also called displacement) reaction the Al and Fe are switching places.
oxygen is odorless and colorless physical or chemical
Answer:
(Physical or Chemical) properties of a substance can easily be observed. … (Physical or Chemical) properties can be used to identify substances. physical property. Oxygen is odorless and colorless.
Explanation:
Which animal is found in the desert?
monkeys
parrots
buffalo
meerkats
Answer:
meerkats
Explanation:
Why are unbalanced equations NOT useful in
chemistry?
Answer:
If the numbers of each type of atom are different on the two sides of a chemical equationExplanation:
As you go down group one of the periodic table, the reactions become and more
Answer:
vigorous
Explanation:
As you go down group one of the periodic table, the reactions become and more vigorous.
Help me with my Science, Part 1 and 2 please this has to be done by tomorrow
Answer:
Part 1: Condensation is when - a
Condensation happens when- water vapour suddenly freezes
Part 2: Water, condenses, vapour, cold, droplets, Condensation
Na2SO3" represents sodium sulfite. What does the 4 mean in the formula 4Na2SO3? There are four atoms of sodium. There are four atoms of sodium sulfite. There are four molecules of sodium sulfite. There are four elements in sodium sulfite. 7
The World on Turtle's Back" is a creation myth because it focuses on characters whom the Iroquois considered "gods. " is an Iroquoian story about people and animals who talk to each other. Explains how the Iroquois believe that the earth was created. Describes Iroquoian social and cultural values.
The designation "4" before Na2SO3 simply means that there are four molecules of sodium sulfite.
A molecule is formed when two or more atoms of the same or different elements come together. The formula of the molecule must reflect the number of atoms from which it is formed. The designation "4" before Na2SO3 simply means that there are four molecules of sodium sulfite.
The "The World on Turtle's Back" is a legend creation story. According to this story, the world was created on a giant turtle back. The folktale is common among the Iroquois Native Americans.
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At room temperature Bromine is a liquid and lodine is a solid, what can be inferred
about the intermolecular forces of these two elements?
Answer:
Explanation:
The intermolecular forces are stronger in Iodine, meaning that its molecules are stronger and can hold that solid structure at room temperature, where Bromine cannot due to its IMF's being weaker.
Which chemicals previously used in products such as refrigerants, aerosol sprays, and cleaning products contributed to the depletion of the ozone layer
Answer:chlorofluorocarbons (CFCs) could deplete Earth's atmospheric ozone layer, which blocks the sun's damaging ultraviolet rays. When the scientists reported their findings in 1974, CFCs were widely used as refrigerant gases and as propellants in aerosol sprays
Explanation:
using the two ways you have learned about between temperature, pressure and volume, what are two ways you could increase the gas pressure of a system.
Answer:
I don't know do you know tell me please
why does a oxygen atom form a 2- ion
Answer:
It's because it has 2 electrons on its outer ring
Explanation:
It has a -2 ion due to it having 2 more electrons than protons making it an overall negative. It's well known in chemistry that the first ring can only hold 2 electrons while the second and furthermore can hold up to 8. But what happens when you have 9? a new ring starts and it would only contain 1 electron.. In our case here it has 2 more electrons than protons and those 2 electrons are located on the outer ring
Research the future of energy production. What improvements to (or new methods of) electrical energy production are scientists currently developing? How will they improve on present methods of energy production (what makes these new methods better than the old)? What are the cons of these improvements?
Answer:
Fossil fuels like coal, oil and natural gas supply 80 percent of the world’s energy to warm homes, charge devices and power transportation. They are also the primary human source of greenhouse gas emissions. Stanford scientists broadly agree that curtailing our use of fossil fuels would have significant benefits like improving health and reducing the number and severity of natural disasters, but it’s not yet clear what can replace them.
Explanation:
a volume of .5650 will exert
Answer: A volume of .5650 what? And what unit will be considered?
Cu(OH)₂ +H₃PO₄ = Cu₃(PO₄)₂+H₂O
how do i balance this equation
balanced equation =
3Cu(OH)2 + 2H3PO4 → Cu3(PO4)2 + 6H2O
is the transfer of heat from one object to another by direct contact. Which materials conduct heat most easily?
Answer:
Conduction is the transfer of heat between substances that are in direct contact with each other. Explanation:The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more.
explain how wavelength is related to the energy of a wave
Answer: as the wavelength gets shorter, the energy increases; as the wavelength gets longer, the energy decreases. The greater the energy, the larger the frequency and the shorter (smaller) the wavelength.
Answer:
Just as wavelength and frequency are related to light, they are also related to energy. The shorter the wavelengths and higher the frequency corresponds with greater energy. So the longer the wavelengths and lower the frequency results in lower energy. The energy equation is E = hν.
Just saying, you have the wrong subject. This should be physics I think.What happens when your face is near the spoon. Please specify.
Answer:
RBCs are disc-shaped with a flatter, concave center. This biconcave shape allows the cells to flow smoothly through the narrowest blood vessels. ... Many RBCs are wider than capillaries, but their shape provides the needed flexibility to squeeze through
Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3) and acetic anhydride (C4H6O3):
C7H6O3 + C4H6O3 -----> C9H8O4 + HC2H3O2
(a) How much salicylic acid is required to produce 1.5 x 10^2 kg of aspirin, assuming that all of the salicylic acid is converted to aspirin? (b) How much salicylic acid would be required if only 80% of the salicylic acid is converted to aspirin? (c) What is the theoretical yield of aspirin of 185 kg of salicylic acid is allowed to react with 125 kg of acetic anhydride? (d) If the situation described in part (c) produces 182 kg of aspirin, what is the percentage yield?
Explanation:
the equation is yes a the line of jointing line passing the ball to is
what is the oxidation number of sulfur in the sulfate ion?
Answer:
+6
Explanation:
2KClO3 —> 2KCl2+ 3O2
true if balanced or false if not
reaction type 1: synthesis, 2: decomposition, 3: single replacement, 4: double replacement, 5: combustion
Answer:
False. The balanced equation should be
2KClO3-->2KCl + 3O2
it is a decomposition reaction.
How many grams of hydrogen gas are needed to react completely with 54.0 g of oxygen gas, given the following balanced chemical reaction:
2H2 +O2 --->2H2O
Answer:
6.75g of hydrogen will completely react with 54g of oxygen
Explanation:
A mechanical pencil is 14 cm long. What is its length in mm?
Answer:
140mm................
the tree is 18 meters long is an example of
This question is describing a thoroughly opened statement about the length of a three as 18 meters, which in the context of science can be referred to:
- A hypothesis or a result in the scientific method, if one is measuring the length of given objects.
- A measurement, if one is measuring the length of a three or any other object.
In both cases, we can note that the measurement has the following basic structure:
1. A number, defining how large or small the measurement is.
2. A unit, defining the system in which the measurement is reported to the scientific community.
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