What did Thomson contribute to atomic theory?
A. The discovery that positive charge is concentrated in a core, or nucleus
B. The discovery that negative charge is concentrated in a core, or nucleus
C. The discovery of negatively charged particles, now called electrons
D. The idea that electrons have quantized amounts of energy

Answer:

Ball and stick models are three-dimensional models where atoms are represented by spheres of different colors and bonds are represented by sticks between the spheres. ... Space fill models are similar to ball and stick models in that they are three-dimensional models that represent atoms as colored spheres.

Answer:

[tex]4118\ g[/tex]

Explanation:

[tex]We\ are\ given,\\No.\ of\ moles\ of\ Na_2SO_4\ provided=29\ moles\\Hence,\\Now,\\Lets\ calculate\ the\ Gram\ Molecular\ Mass\ of\ Na_2SO_4.\\We\ know\ that,\\Gram\ Atomic\ Mass\ of\ Sodium(Na) \approx 23\ g\\Gram\ Atomic\ Mass\ of\ Sulphur(S) \approx 32\ g\\Gram\ Atomic\ Mass\ of\ Oxygen(O) \approx 16\ g\\Hence,\\We\ observe\ that,\\One\ molecule\ of\ Na_2SO_4\ is\ made\ up\ of\ 2\ Sodium\ Atoms,\ 1\\ Sulphur\ Atom\ and\ 4\ Oxygen\ Atoms.[/tex]

[tex]Hence,\\Gram\ Molecular\ Mass\ of\ Na_2SO_4=2*(GAM\ of\ Na)+1*(GAM\ of\ S)\\+4*(GAM\ of\ O)\\=2*23+1*32+4*16\\=46+32+64\\=46+96\\=142\ g[/tex]

[tex]Hence,\\We\ also\ know\ that,\\Mass\ of\ A\ Sample=No.\ of\ moles*Gram\ Molecular\ Mass\\Hence,\\Mass\ of\ 29\ moles\ of\ Na_2SO_4=29*142=4118\ g[/tex]

Answer:

4118.2

Explanation:

Given: 29 moles of na²[tex]So^{4}[/tex]

To find: In grams.

Solution: Wrong

If 1 na²[tex]So^{4}[/tex] is 142 grams, then 29 grams will be found if a set of fraction has been set up;

Let [tex]"x"[/tex] be the variable

[tex]\frac{142}{1} = \frac{29}{x}[/tex]

Cross multiply

[tex]\frac{142}{29}[/tex] [tex]= 4.9[/tex]

Correct Solution

Multiply 29 by 142 = 4118

Answer:

a) melting point

Answer:

Products

Explanation:

Answer:

uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh this is hard I'm a come back when I solve it

Answer:

[tex]\boxed {\boxed {\sf B. \ 2 \ diploid \ cells \ and \ 4 \ haploid \ cells}}[/tex]

Explanation:

Mitosis is a type of cell division. It occurs in somatic cells, which are basically any cells other than sex cells. A cell replicates the genetic material then undergoes one division to create 2 identical cells, both with a complete set of chromosomes. These are known as diploid cells.

Meiosis is another type of cell division, but it occurs only in sex cells, called gametes. The cell replicates the genetic material and the chromosomes cross over, which creates completely unique cells. The cell divide to create 2 cells, but then they divide again to create 4 cells. They each have half of the chromosomes of a somatic cell, so they are haploid cells

So, mitosis results in 2 diploid cells and meiosis forms 4 haploid cells.

A and B are true.

C and D are false.

Out of the given four statements, A and B are only correct.

Explanation:

So from this, we can conclude that out of the given four statements, A and B are only correct.

Learn more about the net ionic equation here:

brainly.com/question/7018960?referrer=searchResults

brainly.com/question/19510514?referrer=searchResults

Answer:

sunlight, water, carbon dioxide, soil, are the basics which you also have phosphorus and nitrogen

Answer:

B and I think A but you may want a secon opinion on that

Explanation:

I know that electrons are shared with covalent bonds so I assume the 2 answers are the ones with electrons it them

WHAT- WHAT GRADE R YOU IN 0,0

Answer: if pressure rises in closed vessel and temperature is low enough,

Gas may condense to liquid state

Typically, this happens when we raise the pressure at room temperature, but there are other situations that aren't covered, including lowering the temperature at room pressure.

Temperature is defined as a measurement of an object or substance's warmth or coldness in relation to a standard value.  As opposed to extensive characteristics, like mass or volume, temperature is referred to as an intense property—one that is independent of the quantity of matter being considered—along with pressure, density, and other comparable properties.

If the temperature is low enough and pressure rises in a closed vessel, A gas can turn into a liquid form.

Thus, typically, this happens when we raise the pressure at room temperature, but there are other situations that aren't covered, including lowering the temperature at room pressure.

To learn more about temperature, refer to the link below:

https://brainly.com/question/11464844

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Answer:

carbon is a nonmetal with 4 valence electrons

Explanation:

The element carbon is on the nonmetal section of the periodic table.

Answer:

666.22grams

Explanation:

The balanced chemical equation of this reaction is given as follows:

2Na + Cl2 → 2NaCl

Based on the above equation, 1 mole of Chlorine gas (Cl2) is needed to produce 2 moles of sodium chloride (NaCl).

Therefore, 5.7moles of Cl2 will react to produce (5.7 × 2) = 11.4moles of NaCl.

Note that, the mass of NaCl was asked in this question. We find the mass of NaCl from the mole by using the formula;

moles = mass/molar mass

Molar mass of NaCl = 58.44 g/mol

11.4 = mass/58.44

mass = 58.44 × 11.4

mass = 666.22grams.

Answer:

Chemical symbol:

Aluminum:Al

Berylium: Be

Calcium: Ca

Flourine: F

Neon: Ne

Nitrogen: N

Silicon: Si

Silfur: S

Element name

Ar: Argon

B: Boron

Li: Lithium

Na: Sodium

Fe: Iron

Atomic number

C:6

Fe: 26

Pb: 82

O: 8

N: 7

Zn: 30

Answer:

aluminum- Al

beryllium- Be

calcium- Ca

flourine- F

neon- Ne

nitrogen- N

silicon- Si

sulfur- S

_____________________________________________________

Ar- argon

B- boron

Li- lithium

Na- sodium

Fe- iron

______________________________________________________

C- 6

Fe- 26

Pb- 82

O- 8

N- 7

Zn- 30

Explanation:

Answer:

Yes, yield.

Explanation:

N2(g) + 3 H2(g) → 2 NH3 (g) balanced equation

First, find limiting reactant:  

Moles H2 = 1.83 g x 1 mole/2 g = 0.915 moles H2

Moles N2 = 9.84 g N2 x 1 mole/28 g = 0.351 moles N2

The mole ratio of H2: N2 is 3:1, so H2 is limiting (0.915 is less than 3 x 0.351)

Theoretical yield of NH3 = 0.915 mol H2 x 2 mol NH3/3 mol H2 = 0.61 moles NH3

Answer:

There are 0.1 moles of solute in 250 mL of 0.4 M solution

Explanation:

because it is

Answer:

22.9 Liters CO(g) needed

Explanation:

2CO(g)     +   O₂(g)    =>    2CO₂(g)

? Liters          32.65g

                 = 32.65g/32g/mol

                 =   1.02 moles O₂

Rxn ratio for CO to O₂ = 2 mole CO(g) to 1 mole O₂(g)

∴moles CO(g) needed = 2 x 1.02 moles CO(g) = 2.04 moles CO(g)

Conditions of standard equation* is STP (0°C & 1atm) => 1 mole any gas occupies 22.4 Liters.

∴Volume of CO(g) = 1.02mole x 22.4Liters/mole = 22.9 Liters CO(g) needed

___________________

*Standard Equation => molecular rxn balanced to smallest whole number ratio coefficients is assumed to be at STP conditions (0°C & 1atm).

Answer:

Single Replacement

Explanation:

im just smart lol

Answer:

Mass of copper deposited = 31.75 g

Explanation:

According to Faraday's second law of electrolysis, when the same quantity of electricity is passed through different electrolytes, the relative number of moles of the elements deposited are inversely proportional to the charges on the ions of the elements.

From this law, it can be seen that the higher the charge, the lower the number of moles of a given element deposited.

Number of moles of aluminium in 9 g of aluminium = mass / molar mass

Molar mass of aluminium = 27 g

Number of moles of aluminium = 9/27 = 1/3 moles

Charge on aluminium ion = +3

3 moles of electrons will discharge 1 mole of aluminium,

1 mole of electrons will discharge 1/3 moles of aluminium

Number of moles of electrons involved = 1 mole of electrons

Charge on copper ion = +2

1 mole of electrons will discharge 1/2 moles of copper.

Mass of 1/2 moles of copper = number of moles × molar mass of copper

Molar mass of copper = 63.5 g

Mass of copper deposited = 1/2 × 63.5 = 31.75 g

Answer:

its A hope this helps

Explanation:

Answer: “Health is a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity or diet, exercise, mental and social.

Answer: D) Sufficient kinetic energy

Explanation:

Answer:Elastic energy is energy stored in an object for temporary strain. It is basically potential energy.