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Answer:

Synthesis reaction~~~~~~~

Explanation:

Answer:

Well its actually the movement of tectonic plates under the earths surface that when the slide along each other, pull away from each other, or push up against each other they create earth quakes.

Explanation: yes.

Answer:It has 8grams of hydrgen

Explanation:

Answer:

B.

Explanation:

The atomic model represents the position of the sub-atomic particles. Model A was proposed after Rutherford's scattering experiment where the positive particles were deflected in the middle. Thus, option A is correct.

Rutherford's atomic model proposed the presence of the positive nucleus in the middle of the atom while the electrons surrounded them in their orbitals with a negative charge.

He performed the scattering experiment where alpha particles emitted by the radioactive element were used to locate the positions of the electrons, neutrons, and protons.

According to the experiment, model A, best fits as the nucleus made of protons and neutrons takes the center of the atom with negative electrons surrounding them. The nucleus is small as compared to the entire atom.

Therefore, option A. model A best proposes Rutherford's model.

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Answer:

the metal loses electrons to become a positively charged cation

Explanation:

Answer:

Thus there was no accumulation of ions on the nails, as the dissolved gases were already removed, hence no rust formation. In test tube C, a chemical was added to absorb the water vapour. We know that rust formation takes place when a metal is exposed to water vapour.

Explanation:i hope u have a wonderful night and stays safe

Answer: C) a proton is in the nucleus, has a positive charge, and an atomic mass of 1 amu.

Explanation:

Protons are positive so they give a positive charge, they are also never outside of the nucleus.  Only electrons are outside the nucleus.

Answer: a

Explanation:

im big brain

The diagram that shows two (2) waveforms with different amplitudes but the same wavelengths is: Diagram A.

A wave can be defined as a disturbance that is created in a medium, which progressively transports energy from a source to another location without the transportation of matter. Some of the parameters that are associated with a waveform include the following:

Amplitude refers to the maximum displacement of a wave when measured from its equilibrium position.

Wavelength refers to the distance between two (2) successive crests (troughs) of a wave.

Note: Amplitude is measured vertically from an equilibrium position while wavelength is measured horizontally.

In conclusion, Diagram A shows two (2) waveforms with different amplitudes but the same wavelengths.

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Answer:

3.77 moles of Fe contain 2.27 × 10, 24 as an exponent

Answer:

The offspring will all have red-colored flowers

Explanation:

A dominant character is one that is always expressed when it is present.

A recessive character or trait is one that is only expressed in the absence of the dominant character. Thus, when the dominant and recessive character are both present in an organism, the recessive character will be hidden while the dominant character will be expressed.

According to Menedel's laws of inheritance, in the cross between the dominant (RR) red-flowered plant and the recessive (rr) white-flowered plant, the genotype of the offspring will be as follows:

RR x rr = Rr, Rr, Rr,Rr

The offspring are all heterozygous for flower color. However, since red flower color is dominant over white flower color, all the offspring produced will have red-colored flowers.

Answer:

Fe 2 O3 .

Explanation:

Answer:

1.98 ×10^2 g

Explanation:

follow the method in the above image

Answer:

is a way of presenting information about the chemical proportions of atoms

Explanation:

Answer:

B. Unbalanced force

Explanation:

Answer:

I think its unbalanced force

Explanation:

crazy what a quick go.ogle search can do! :)

Answer:

Dalton's atomic theory has been modified as

Explanation:

Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes

Answer:

On the basis of new experimental facts, Dalton's atomic theory has been modified as: ... Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes.

Explanation:

Plz mark brainliest thanks

Answer:

the answer is 4

Explanation:

i took the test and got it right and i would recommend using quizlet it has these flash cards and the answers are there you just click on the one that says your question and it will say your answer on the back. It helps with most of my test! Hope this helps (:

Answer:

Nucleus

Explanation:

The nucleus serves as the cells command center, sending direction to the cell to grow, mature, divide, or die

Answer:Tungsten is made of tungsten while Nichrome is made of nickel chromium. ... Tungsten is used to make filament of bulbs. Nichrome have high resistivity than tungsten.

Explanation:i hope u have a wonderful night and stay safe

Answer:

0.07 g/s.

Explanation:

From the question given above, the following data were obtained:

Mass lost = 9.85 g

Time taken = 2 min 30 s

Mean rate =?

Next, we shall convert 2 min 30 s to seconds (s). This can be obtained as follow:

1 min = 60 s

Thus,

2 min = 2 × 60 = 120 s

Therefore,

2 min 30 s = 120 s + 30 s = 150 s

Finally, we shall determine the mean rate of the reaction. This can be obtained as illustrated below:

Mass lost = 9.85 g

Time taken = 150 s

Mean rate =?

Mean rate = mass lost / time taken

Mean rate = 9.85 / 150

Mean rate = 0.07 g/s

Therefore, the mean rate of the reaction is 0.07 g/s

Ca is -2

Be is stabilized

Ba is -4

Sr is -3

so it would be =>  Ba, Sr, Ca, Be

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The arrangement of the alkaline earth metals from the lowest to highest electronegativity is; Ba< Sr< Ca<Be

Electronegativity refers to the ability of the atoms of an element in a compound to attract the shared electrons of that bond towards itself. It is a property that decreases down the group but increases across the period.

Electronegativity increases across the period as atoms of elements become smaller in size and decreases down the group because of increase in distance between the valence electrons and nucleus.

Since electronegativity decreases down the group, the order of electronegativity from lowest to highest is; Ba< Sr< Ca<Be

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Answer:

10.60 grams of silane gas are formed.

Explanation:

From the reaction:

Mg₂Si(s) + 4H₂O(l) → 2Mg(OH)₂(aq) + SiH₄(g)          

We know that the limiting reactant is Mg₂Si, so to find the mass of SiH₄ formed we need to calculate the number of moles of Mg₂Si:

[tex]\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}}[/tex]

Where:

m: is the mass of Mg₂Si = 25.0 g

M: is the molar mass of Mg₂Si = 76.69 g/mol

[tex]\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}} = \frac{25.0 g}{76.69 g/mol} = 0.33 moles[/tex]

Now, the stoichiometric relation between Mg₂Si and SiH₄ is 1:1 so:

[tex] \eta_{Mg_{2}Si} = \eta_{SiH_{4}} = 0.33 moles [/tex]

Finally, the mass of SiH₄ is:

[tex] m_{SiH_{4}} = \eta_{SiH_{4}}*M_{SiH_{4}} = 0.33 moles*32.12 g/mol = 10.60 g [/tex]

Therefore, 10.60 grams of silane gas are formed.

I hope it helps you!    

Answer:

a mixture

Explanation:

Two or more substances combined chemically, are called a compound

Answer:

............................................

Answer:

Hrxn = -241.82 kJ

Explanation:

2H2(g) + O2(g) --> 2H2O(g) Hrxn = -483.64 kJ ............. (i)

The equation for formation of 1 mol of H2O is given as;

H2(g) + 1/2O2(g) --> H2O(g) ................. (ii)

Eqn (ii) is obtained by dividing eqn (i) by 2

That means the heat of reaction for eqn (ii) is given as;

Hrxn = -483.64 kJ / 2

Hrxn = -241.82 kJ

Answer:-241.82 kJ

Explanation:

your welcome kaylee and have a great day ;)