Complete Symbols
Find each of these:
a) number of protons
b) number of neutrons
c) number of electrons
d) atomic number
e) mass Number
80Br35

Answer:

200 kg

Explanation:

the 200 kg person is heavier due to gravity's force the 100 kg person has less force than the other person

Answer:

massive one that is 200kg

Explanation:

Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.

Volume (liters) of aqueous 0.325 M nitric acid is 0.132 L

Reaction

2HNO₃ + Ba(OH)₂ → Ba(NO₃)₂ + 2H₂O

mass of Ba(OH)₂ = 3.68 g

mol Ba(OH)₂(MW=171,34 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{3.68}{171,34 g/mol}\\\\mol=0.0215[/tex]

From the equation, mol ratio of HNO₃ : Ba(OH)₂ = 2 : 1, so mol HNO₃:

[tex]\tt mol~HNO_3=\dfrac{2}{1}\times 0.0215=0.043[/tex]

Molarity of HNO₃ = 0.325, then the volume of HNO₃ :

[tex]\tt V=\dfrac{n(mol)}{M(molarity)}\\\\V=\dfrac{0.043}{0.325}\\\\V=0.132~L[/tex]

Explanation:

The solids can be classified on the basis of bond they are joined with. There are four types of solids on the basis of bond. There are four type of  crystalline solids: namely,  molecular solids, network solids, ionic solids, and metallic solids. The molecular and the structure of the solid determines its properties likes conductivity, solibility, heat conductivity, and density. Solids are incompressible and rigid as there molecules are fixed in place.

Answer:

Atoms, Molecules, Extended Structures, and Substances

Explanation:

High arky of solids

Answer:

nitrogen dioxide

Explanation:

this was on my chemistry test

Answer: Repeat the experiment several times with the same variable and constants.

Explanation: The experimental procedure should be performed many times so as to determine the effect of the stain remover on mustard stain in different conditions and while using different variables such as water and type of machine used. This will tell how useful the stain remover in all conditions provided to check the accuracy of the stain remover.

Hope this help!!! :)

Answer:

C

Explanation:

if his brother does the expire end it is replication if he was to do the same expirement with the same variables then the same outcome would come out

Answer:

The answer is c radio --> infrared --> ultraviolet --> gamma

Explanation:

I just did it

Answer:

C

Explanation:

just did it

Answer:

d

Explanation:

it's the only one that seems to make sense

1. 92 g

2. 5.4 g

3. 0.217 moles

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

[tex]\tt n=\dfrac{m}{MW}[/tex]

1. the mass of 4 moles of Na(MW= 23 g/mol)

[tex]\tt mass=mol\times MW\\\\mass=4\times 23\\\\mass=92~g[/tex]

2.  the mass of 0.3 moles of water(MW=18 g/mol)

[tex]\tt mass=mol\times MW\\\\mass=0.3\times 18\\\\mass=5.4~g[/tex]

3. the number of moles found in 10g of ethanol C2H5OH(MW=46 g/mol) :

[tex]\tt mol=\dfrac{10}{46}\\\\mol=0.217[/tex]

Answer:

synthesis reactions

Explanation:

Just as synthesis reactions can only form one product, decomposition reactions can only start with one reactant

Answer:

1.7M

Explanation:

Given parameters:

Volume of solution = 0.3L

Number of moles  = 0.5moles

Unknown:

Molarity  = ?

Solution:

The molarity of a substance is the number of moles of solute that can be found in the volume of a solution.

  Molarity  = [tex]\frac{number of moles }{volume}[/tex]  

      Insert the parameters and solve;

 Molarity  = [tex]\frac{0.5}{0.3}[/tex]  = 1.7M

Answer:

13.8 mol CO₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

8.32 × 10²⁴ molecules CO₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]8.32 \cdot 10^{24} \ molecules \ CO_2(\frac{1 \ mol \ CO_2}{6.022 \cdot 10^{23} \ molecules \ CO_2} )[/tex] = 13.816 mol CO₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

13.816 mol CO₂ ≈ 13.8 mol CO₂

Answer:

Hydrogen or hydroxonium ions in the solution

Hydroxyl ions in the solution

Explanation:

A pH of 1 shows there is a lot of hydroxonium ions in the solution and a pH of 14 shows there is a lot of hydroxyl ions in the solution.

Answer:

28.01 percent

Explanation:

Iron (III) sulphate, [tex]Fe_2(SO_4)_3[/tex], has 2 atoms of Fe.

One atom of Fe has a molar weight of 56. Hence, 2 atoms of Fe would have a total molar weight of 56 x 2 = 112 g/mol

Molar weight of  [tex]Fe_2(SO_4)_3[/tex] = 399.88 g/mol

Percentage Fe in [tex]Fe_2(SO_4)_3[/tex] = 112/399.88 x 100%

                       = 28.01%

The percentage of iron is iron (III) sulphate is, therefore, 28.01 percent.

Answer:

c

Explanation:

Answer: np

Explanation:

Correctly matched are :

A landslide is also called a land slip. It refers to several forms of mass wasting and may include a wide range of ground movements. They occur in a variety of environments characterize by gentle and steep slope gradients.

The mudflow is a mixture of rocks and soil along with water. While a creep is a slow downloads movement of rocks and soil.

Find out more information about the mass movement.

brainly.com/question/6068732

Answer:

First one: Yes, It can be negative.

Explanation:

First one: The reason you can have negative acceleration is that acceleration can slow down, or decelerate, causing the negative acceleration.

Answer:

a. increase

Explanation:

Based on the kinetic molecular theory of gases, the average kinetic energy of the system will increase.

Therefore, due to the increase in temperature, the average kinetic energy of the system increases.

Answer:

Electrolysis of water

Explanation:

The electrolysis of water is a decomposition reaction in which electricity is used to break down a compound into simpler molecules.

Decomposition of water is carried out in the Hofman Voltameter.

This process is achieved by passing current through an acidified water.

The expression is given as:

               2H₂O →  2H₂   +  O₂

Answer:

Group 1 metals or the alkali metals

Explanation:

The group 1 elements are all metals except for hydrogen, the first element in the group. Group 1 metals have one valence electron in their outermost shell. The metallic character increases as one goes down the group.

The metallic character of an element is determined by how readily it loses electrons. Elements that lose electrons most easily have the greatest metallic character. Group 1 metals have the greatest metallic character due to the ease with which they donate or lose their one valence electron. As the atomic radius increases on going down the group, their metallic character increases. Also, due to screening effect of the inner electrons on the valence electron from the positive nuclear charge of the nucleus, metallic property increases on going down the group.

Answer:

stem cells

Explanation:

hope it helps

Answer:

Protons are the atomic number and for each element they never change.

Electrons are equal to the atomic number unless it is an Ion (Positive charge means it has less negative means it has more)

Mass number is Protons+Nuetrons

Explanation:

Answer:

129.8 grams

Explanation:

Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry

You multiply mols x Molecular weight.

So

3.32x 39.1= 129.8 grams

Answer:

Al2(SO4)3 + 3Mg(OH)2 → 2Al(OH)3 + 3MgSO4

Explanation:

Explanation:

atomic number=88

atomic number =4

why is Ra larger than Be

hope it helps:)

Answer:

Explanation:

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{3.55 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.05897...[/tex]

We have the final answer as

Hope this helps you

Answer:

See the answer below

Explanation:

From the equation, 1 mole of C requires 1 mole of O2 for a balanced reaction.

1 g of C will not exactly react with 1 g of O2 because the 1 g of each of the reactants contain different amounts of the substance.

The amount (in moles) of a substance is the mass of that substance divided by the molar mass.

Hence, 1 g of C will contain 1/12 moles of the substance while 1 g of O2 will contain 1/32 moles of the substance.

Answer:

1. Foods that have changes that are chemically introduced.

2. corn soybeans apples etc

3. sot they last longer or look better

4. new dna is placed in them and their seeds

5. they are not as good for humans

Explanation:

Answer:up

Explanation:

Answer:

1.5 × 10²⁴ atoms Mn

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

2.5 mol Mn

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]2.5 \ mol \ Mn(\frac{6.022 \cdot 10^{23} \ atoms \ Mn}{1 \ mol \ Mn} )[/tex] = 1.5055 × 10²⁴ atoms Mn

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

1.5055 × 10²⁴ atoms Mn ≈ 1.5 × 10²⁴ atoms Mn

Answer:

Dicalcium phosphate. (I'm sure meant for the "o" to be an "a" for Calcium).

Explanation:

I hope this helps! :D Have a nice night!