someone help me please i’ll give brainly

Answer:

Animal

Explanation:

The atomic mass number tells us the number of neutrons and protons in the nucleus of an atom.

Answer:

It is a Mixture

Explanation:

It's a mixture because it was a substance made from mixing other substances together. And when the magnet went over the powder, the iron  is lifted and not the sulfur. So the different parts of it can be separated by any physical means that allows the parts to seen separated

Answer:

its is a mixture

Explanation: because I did the question

Answer: chill google dat junk sis lol but i thought i could help i just dont wanna get u da wrong answer su

Explanation:

Explanation:

As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together.

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 80 × 1.6

We have the final answer as

Hope this helps you

Answer:

[tex]\boxed {\boxed {\sf B. \ 22 \ grams}}[/tex]

Explanation:

We need to use the formula for heat of vaporization.

[tex]Q=H_{vap}*m[/tex]

Identify the variables.

[tex]H_{vap}=2260 \ J/g\\Q=50,000 \ J \\[/tex]

Substitute the values into the formula.

[tex]50,000 \ J=2260 \ J/g*m[/tex]

We want to find the mass. We must isolate the variable, m.

m is being multiplied by 2260 J/g. The inverse operation of multiplication is division. Divide both sides by 2260 J/g.

[tex]\frac{50,000 \ J}{2260 \ J/g} =\frac{2260 \ J/g*m}{2260 \ J/g}[/tex]

[tex]\frac{50,000 \ J}{2260 \ J/g} =m[/tex]

Divide. Note that the Joules (J) will cancel each other out.

[tex]\frac{50,000 \ }{2260 \ g} =m[/tex]

[tex]22.1238938 \ g =m[/tex]

Round to the nearest whole number. The 1 in the tenth place tells us to leave the number as is.

[tex]22 \ g \approx m[/tex]

The mass is about 22 grams, so choice B is correct.

pH of solution = 9.661

pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.

pH = - log [H⁺]

So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.

pOH=-log[OH⁻]

[tex]\tt pOH=-log[4.583\times 10^{-5}]\\\\pOH=5-log~4.583=4.339[/tex]

pH+pOH=pKw

[tex]\tt pH=14-4.339\\\\pH=9.661[/tex]

Answer:

A product

B coefficient

C script

D rectant

Answer:

B) 6 Newtons

Explanation:

Applied Force = 10 N

Resistive Frictional Force = 4 N

As we know that frictional forces always act in the opposite of the relative motion [force], and that opposite forces always subtract.

Hence,

The Net Force acting on the block = 10 N -4 N = 6 Newtons

Answer: The Answer is B

The question is incomplete, the complete question is;

The table above summarizes data given to a student to evaluate the type of change that took place when substance X was mixed with water. The student claimed that the data did not provide enough evidence to determine whether a chemical or physical change took place and that additional tests were needed. Which of the following identifies the best way to gather evidence to support the type of change that occurred when water and Xwere mixed?

A. Measuring the melting point of the mixture of water and X

B. Adding another substance to the mixture of water and X to see whether a solid forms

C Measuring and comparing the masses of the water,  X, and the mixture of water and X

D Measuring the electrical conductivities of X and the mixture of water and X

Answer:

D Measuring the electrical conductivities of X and the mixture of water and X

Explanation:

Unfortunately, I am unable to reproduce the table here. However, from the table,  the temperature of the of the mixture of the solid X and water was 101.6°C. This is above the boiling point of water and way below the temperature of the solid X.

This goes a long way to suggest that there was some kind of interaction between the water and X which accounted for the observed temperature of the system of X in water.

The only way we can be able to confirm if X actually dissolved in water is to measure the conductivity of the water. dissolved solids increase the conductivity of water.

The statement which identifies the best way to gather evidence to support the type of change that  occurred when water and X were mixed is:

According to the given question, we are asked to show the statement which identifies the best way to gather evidence to support the type of change that  occurred when water and X were mixed. \

As a result of this, we can see that from the complete question, there is a need to note the temperature of the solution which is 101.6°C and then to measure the conductivity of the water to know for sure the type of change that occured.

Therefore, the correct answer is option D

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[tex]\huge\boxed{Option A}[/tex]

As the option says, the kinetic energy will decrease.  the volume decreases because  the molecules are slower and collide less. Less molecules make the effective collisions due to which the kinetic energy of molecules is less, so less kinetic energy results in the shrinkage. So decrease in temperature lowers the rate of the reaction and in the volume.

Answer:

All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.

Explanation:

Answer:

All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.

Explanation:

The atomic mass of nickel is 58.71 gm and the given mass of nickel is 122 gm. Therefore, 2.08 moles are present in a 122-gram sample of nickel.

Nickel:

Mass of nickel given: 122 grams.

Atomic mass of nickel: 58.71 g mol

Number of moles = Mass / molar mass

                             = 122/ 58.71

                              = 2.078

                              = 2.08 moles.

The atomic mass of nickel is 58.71 gm and the given mass of nickel is 122 gm. Therefore, 2.08 moles are present in a 122-gram sample of nickel.

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The element having 8 valence electrons and 4 energy levels is krypton, (Kr)  it is a noble gas included in 18th group.

Krypton is 36th element in periodic table with main shell electronic configuration, K= 2, L= 8, M= 18 and N= 8 where, K, L, M and N are energy levels.

Krypton is in the group noble gases also called inert gases. The group members of Kr are, Helium, argon and xenon. Thus krypton is the element with 4 energy levels and 8 valence electrons.

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Answer: anion , gained

Explanation:

When an atom accepts an electron negative charge is created on atom and is called as anion.

When atom loses an electron positive charge is created on atom and is called as cation.

Phosphorous (P) has an atomic number of 15 which means it contains 15 electrons and there are 5 valence electrons.

For formation of , the atom of phosphorous (P) must gain three electrons in its valence shell 3p so as to complete its octet

[tex]P:15:1s^22s^22p^63s^23p^3[/tex]

[tex]P^{3-}:18:1s^22s^22p^63s^23p^6[/tex]

Answer:

B is correct

Explanation:

pls Brainliest

Answer:

Eddie reeling in a fish that he has caught

Explanation:

This tablet insufficient to neutralize the acid in the patient's stomach

Reaction

Al(OH)₃(s) + 3HCl(aq) ⇒ 3 H₂O(l) + AlCl₃(aq)

0.25 g of  Aluminum hydroxide-Al(OH)₃ , mol (MW=78 g/mol) :

[tex]\tt \dfrac{0.25}{78}=0.00321[/tex]

mol HCl : mol Al(OH)₃ = 3 : 1

[tex]\tt mol~HCl=3\times 0.00321=0.00963[/tex]

mass HCl (MW=36,46 g/mol) :

[tex]\tt 0.00963\times 36.46=0.351[/tex]

0.351 < 0.88⇒this tablet insufficient to neutralize the acid

Answer:

The reason for the arrangement of elements in the period is based upon the atomic number. In all periods, including the elements are arranged according to the atomic number in increasing order

Explanation:

Hope this helped!

Answer:

The reason for the arrangement of elements in the period is based upon the atomic number. In all periods, including the elements are arranged according to the atomic number in increasing order.

Explanation:

The intial temperature : 59.865 °C

Heat added :

Q = m . c . ΔT

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

[tex]\tt 305=94.8\times 0.128\times (85-t_1)\\\\85-t_1=25.135\\\\t_1=59.865^oC[/tex]

Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

11.0fy³=11.0ft³/21.0ft³×55°F

The temperature is 28.809°F≈29°F

29°F is the temperature of the helium if the volume of the balloon decreases to 11.0ft³.

Temperature expresses hotness and coldness or a measure of the average kinetic energy of the atoms or molecules in the system.

Assuming pressure is held constant, the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³- 55.0°F

11.0fy³ = 11.0ft³ ÷ 21.0ft³ × 55°F

The temperature is 28.809°F ≈ 29°F

Hence, 29°F is the temperature of the helium if the volume of the balloon decreases to 11.0ft³.

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The formation of bands in a crystal

Explanation:

- hope that helped :)

Answer: it’s B for edge !

Explanation: took the test

Answer:

B. Electron pairs repelling each other push atoms apart

Explanation:

The VESPR theory explains molecular shape by suggesting that electron pairs repelling each other push atoms apart.

If an atom is bonded to two or more other kinds of atoms as in many covalent molecules and ions, the shape of the system is determined by the geometry of the bonds around the central atom.

Answer:

6 hours

Explanation:

If it is traveling at 50mph and needs to reah 300 miles, to figure this problem out you would want to divide 300 by 50 to get 6 hours. So it will take six hours until the car travels 300 miles

Hope this helps.

Answer: A car travels at a rate of 50 miles per hour. how long will it take the car to travel 300 miles?

Explanation: .

Applying the distance formula:

d = rt

where

d is distance (300 miles)

r is rate (50 mph)

t is time (hours)

.

300 = 30t

300/30 = t

10 hours = t

Answer:

they represent liquid state of matter.

Answer:

they state liquid state of matter .

hope it is helpful to you

Answer: The best material to make the handrails of the playhouse is Aluminum. This is because aluminum is an extremely versatile metal with a number of advantages, it is recognized for being both lightweight and flexible.

Explanation:

HOPE THIS HELPS!

ALSO THE OTHER ANSWER IS WRONG.

JUST SAYING >33

Answer:

c

Explanation:

Answer:

the answer of the question is C

Answer:

The answer is the troposphere

Explanation:

It is the closest to earth