Answer:
A substance composed of two or more metals is called an alloy
Explanation:
How many moles of fluorine gas are in 54.1 grams of fluorine gas?
Answer: 2.85 moles of flourine
Explanation:
find the atomic/molar mass of flourine on your periodic table.
multiply the given mass (54.1g) by (1 mole of flourine/atomic mass of flourine)
54.1g flourine * 1mole of flourine/18.998g flourine
(g flourine) in the above equation cancel each other.
54.1/18.998 = 2.85 mole of flourine
Who created the "plum pudding model" of the atom?
Thomson
Rutherford
Crooks
Chadwick
1.5 of potassium ioxcide in 150cm^3 of solution
Answer:
Explanation:
I'm not sure what is being asked, not the units of "1.5." I don't know of potassium "ioxicide." Was "dioxide" intended?
I'll assume the question is "What is the concentration, in Molar, of 1.5g of potassium dioxide in 150cm^3 of water (150cm^3 is 150 ml).
The molar mass of K2O, potassium dioxide, is 94.2 g/mole. 1.5g is (1.5g/94.2 g/mole) or 0.0159 moles of K2O. The definition of Molar is moles/liter. So take the moles of K2O and divide by the liters, which is 0.150L in this case.
(0.0159 moles K2)/0.150 L = 0.106 M K2O
pliz answer 1 & 2 .... I'll tag best answer brainliest .... no spamming
1,chlorine ions
2,sodium chloride
What do all cations have in common? Check all that apply.
A. positive
B. negative
C. metals
D. non-metals
Answer:
B
Explanation:
All cations have more protons than electrons so they always have a positive charge.
What is the final temp of
solver if the temperature of
25.89 sample of silver
starts out at 30.0°C and
40.5) of heat is added?
The specific heat of silver
130235 ](°C).
do number 16 please
I’LL GIVE BRAINLY
Answer: I think they will be compared by dividing 10 from 100 which equals 10 which will be your volume of the boiling point
Explanation:
Please look at others answer I am not 100% sure if this is correct.
"type one to two paragraphs describing the changes in potential and kinetic energy of the cart.
Be sure to discuss how the potential and kinetic energy of the cart changes at each of the four
positions along the track, and explain why these changes occur."
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The cart starts out in position A with high potential energy, low kinetic energy, and some thermal energy. As the cart progresses into position B, the kinetic energy begins to increase and the potential energy begins to decrease; as the thermal energy increases as thermal energy from the track is transferred to the cart through friction. Once the cart reaches position C, it has high kinetic energy, low potential energy, and some thermal energy. At position D, the cart has high potential energy, low kinetic energy, and some thermal energy. The potential energy throughout is correlated to gravity, the kinetic energy is correlated to momentum, and the thermal energy is correlated to friction. The potential energy is at its maximum during position A, and its minimum at position C; the kinetic energy is at its maximum during position C, and its minimum at position A; the thermal energy is at its maximum during position B, and its minimum at position A
which scientist developed the nuclear model of the atom?
Answer:
Earnest Rutherford
Explanation:
From what I beleive, Rutherford had created the nuclear model
Fill in the blanks
a. Silica gel is used as …………… .
b. The ………. distillation is used to obtain petroleum products from crude oil.
c. Chromatography is used to separate………… .
d. Liebig’s condenser is used in ………… .
e. Plant pigment can be separated by …………… .
Answer:
a:It is used as a moisturizer
b:Paraffin
c:Dissolve substances
d:Chemical distillation
e:Paper chromatography
a train car is to a train as a…
Determinar los gramos de ácido clorhídrico que se requiere para preparar 500 ml de solución 0.2 M de ácido clorhídrico
Answer:
m = 3.65 gram
Explanation:
ácido clorhídrico = HCl
M = m/Mr × 1000/mL
0.2 M = m/36.5 gr/mol × 1000/500 mL
0.2 M = m/36.5 gr/mol × 2
m/36.5 gr/mol = 0.2 M/2/L
m/36.5 gr/mol = 0.1 mol
m = 36.5 gr/mol × 0.1 mol
m = 3.65 gram
molecular formula of sulphur trioxide by criss cross method
Answer:
Sulfur trioxide: SO3.
Explanation:
How I came to this conclusion:
I noticed that the compound consists of non-metals, therefore it must be a covalent compound -
meaning I use prefixes for compounds.
Sulfur is S. Simple enough. Trioxide has the prefix of tri, meaning "3". Therefore there is 3 atoms of oxygen. Combine them and I get SO3.
Don't be confused with sulfite: (SO3)2− and sulfate: (SO4)2−
Two scientists work together on an experiment, but they have different hypotheses. When scientists look at the experimental results, they interpret the data in different ways and come to different conclusions. Which of the following does this situation best illustrate?
Answer:
The correct answer is option D, confirmation bias.
The correct answer is option D, confirmation bias.Confirmation bias is the tendency to interpret data in a way that confirms the already designed hypotheses.
The correct answer is option D, confirmation bias.Confirmation bias is the tendency to interpret data in a way that confirms the already designed hypotheses.As the two scientists interpret the data (or experimental results) in different ways to adhere to the different hypotheses. this is also called indicative of cognitive bias. This is also called inductive reasoning where the premise is viewed as evidence for the validity of the conclusion.
Answer:
d
Explanation:
got it right on plato
Please tell me the answer of this question, first person to answer will be marked brainlist
Finalmente responde:
- ¿Cuáles serían las características del agua filtrada que evidencie el funcionamiento del filtrador?
– Consideras que volver a filtrar la misma muestra de agua ¿disminuye la turbidez del agua?,, AYUDAAAAAAAAA
El agua se purifica a partir de un proceso de filtrado. Las características que evidencian el filtrado incluyen pH normal, color cristalino, ausencia de metales pesados y/o microorganismos, etc.
Los filtros para purificar agua son dispositivos que permiten el limpiado del agua con el objetivo de convertirla apta para consumo humano.En general, los filtros para lograr la purificación del agua consisten de carbón activado, el cual se prensa con alta presión. Este dispositivo de carbón activado permite secuestrar las partículas sólidas que pasan a través del filtro, con lo cual el agua sale a través del filtro completamente purificada.Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:
El agua sale cristalina, es decir, sin ningún tipo de color que evidencie la presencia de contaminación.El pH del agua potable debe oscilar entre valores normales (6,5 a 8,5)No debe contener metales tales como plomo, arsénico o cadmio (altamente tóxicos)No debe contener microorganismosAprende más sobre este tema en:
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Can someone help me with this
Answer: It would be malleable, solids, luster, conductors, reactive
Explanation:
Environmental factors can affect an organism's appearance, behavior, and health. For example, in certain reptiles, the temperature of the environment may determine the sex of the offspring. Both genetics and environmental factors determine the observable, physical characteristics of organisms, also called their _______________ in genetics.
a. phenotypes
b. organelle
c. morphology
d. genotype
Answer:
Phenotype
Explanation:
The observable physical characteristics of an organism, as determined by both genetic makeup and environmental influences.
The question is asking about the observable physical characteristics of organisms.
We can eliminate options B and C because they don't make much sense. An organelle is a structure in a cell which conducts cellular functions, and the morphology of an organism is basically the anatomy and physiology of the organism, which isn't quite what we're looking for.
Keeping this in mind, here is some information on prefixes:
geno - relating to genes
pheno - relating to what's observable
The second one sounds a lot like what we're looking for, and just in case, the definition of phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
Therefore your answer is: A. phenotypes
2.) Which of the following has the fastest moving particles?
a.) A desk at 25°C
b.) A glass of water at 25°C
A balloon filled with helium at 25°C
Explanation:
A balloon filled with helium at 25°C
because un gas particles as far as possible
and helium is gas so answer is c
Convert 4.36 x 10 square 25 molecules of CH3OH to moles.
Answer:
72.43 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.36 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 72.425249[/tex]
We have the final answer as
72.43 molesHope this helps you
pls help with this !!!!!!
Answer:
thank you for the update on
Answer:
es la dos
Explanation:
atoms from different element combine to form
Answer:
new substances
Explanation:
Atoms of different elements can combine to make new substances. A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.
As an atom gains extra electrons, it also changes size. How does the size change, and what causes the change?
The atom gets smaller because there are more negatively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets smaller because there are more negatively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets smaller because there are more positively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets smaller because there are more positively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets larger because there are more negatively charged subatomic particles spread out around the nucleus.
The atom gets larger because there are more negatively charged subatomic particles spread out around the nucleus.
The atom gets larger because there are more positively charged subatomic particles spread out around the nucleus.
The atom gets larger because there are more positively charged subatomic particles spread out around the nucleus.
first to answer gets 50 points
Answer:
Expl
Electron: A negatively charged particle found circling or orbiting an atomic nucleus. An electron, like a proton is a charged particle, although opposite in sign, but unlike a proton, an electron has negligible atomic mass. Electrons contribute no atomic mass units to the total atomic weight of an atom.\anation:
does 1 gallon or 100 gallons take longer to boil
Answer:
it takes 100 gallons longer to boil then it does 1 gallon
Explanation:
brainliest please??
Can matter be created or
destroyed?
Yes or No
Answer:
No
Explanation:
The same amount of matter is present before and after chemical and physical changes. Matter cannot be created or destroyed
Answer:
none is created or destroyed. This concept is called the Law of Conservation of Mass.
when washing tableware the water temperature should be:
Why do atoms exchange or share electrons during bonding?
to obtain a full outer electron shell
to attract an ion with the opposite charge
to become neutral
to have eight inner level electrons
Answer:
to obtain a full outer shell
Explanation:
The atoms of some elements share electrons because this gives them a full valence shell. ... If atoms can't achieve a full outer shell by transferring electrons, they resort to sharing. In this way, each atom can count the shared electrons as part of its own valence shell. This sharing of electrons is covalent bonding.
Atoms generally exchange or share electrons during bonding because they want to obtain a full outer electron shell. Thus, the correct option for this question is A.
What is Chemical bonding?Chemical bonding may be defined as a type of interaction that is significantly accomplished through the association of atoms into molecules, ions, crystals, and other stable species that make up familiar substances.
According to the context of this question, the atoms of some elements typically transfer their electrons to the other elements in order to achieve a fully filled outermost shell.
If they do not have a tendency of transferring, they follow a different mechanism of sharing their electrons. The sharing of electrons gives rise to the formation of covalent bonding.
Therefore, atoms generally exchange or share electrons during bonding because they want to obtain a full outer electron shell. Thus, the correct option for this question is A.
To learn more about Sharing and transferring electrons, refer to the link:
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What amount of heat (in kJ) is required to convert 19.8 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･°C; specific heat capacity of gas = 0.932 J/g･°C; ∆Hvap = 22.5 kJ/mol; normal boiling point, Tb = 57.3°C)
The total energy required to convert the unknown liquid to gas at the given temperature is 7.215 kJ.
The given parameters;
mass of the unknown liquid, m = 19.8 gmolar mass of liquid = 83.21 g/molinitial temperature of the liquid, = 19.2 °Cboiling point temperature of the liquid, = 57.3°Cfinal temperature of the liquid = 93.5 °CThe total heat required to convert the liquid to gas is calculated as follows;
H = Heat to raise to boiling temp. + Heat to vaporize the liquid + Heat of gas vapor
The heat required to raise the temperature of the liquid to boiling point;
[tex]H_1 = mc\Delta t\\\\H_1 = 19.8 \times 1.58 \times (57.3 - 19.2)\\\\H_1 = 1,191.92 \ J\\\\H_1 = 1.1919 \ kJ[/tex]
The number of moles of the liquid is calculated as;
[tex]moles= \frac{19.8 \ g}{83.21 \ g/mol} = 0.238 \ mol[/tex]
The heat required to vaporize the liquid;
[tex]H_2 = n H_{vap}\\\\H _2 = 0.238 \times 22.5\\\\H_2 = 5.355\ kJ[/tex]
The heat of the gas vapor is calculated as;
[tex]H_3 = mc_g \Delta t\\\\H_3 = 19.8 \times 0.932 \times (93.5- 57.3)\\\\H_3 = 668.02 \ J\\\\H_3 = 0.668 \ kJ[/tex]
The total energy required to convert the unknown liquid to gas at the given temperature is calculated as;
[tex]H_{total} = 1.1919 \ kJ \ + \ 5.355 \ kJ \ + \ 0.668 \ kJ\\\\H_{total} = 7.215 \ kJ[/tex]
Thus, the total energy required to convert the unknown liquid to gas at the given temperature is 7.215 kJ.
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How do I know if a reaction is spontainous or not?
Answer:
i dont care to you
Explanation:
cause you are tuyo
the answer is this
A compound is a hydrate when it