I BET NO ONE KNOWS THIS 10. Which of the following words is closest to the same meaning as hypothesis?
fact
law
formula
suggestion
conclusion

Explanation:

1.39/0.25 * 100% = 5.56%

Answer:N-1

             H-3

             C-1

             H-4

Explanation:Nitrogen-1,Hydrogen-3(Ammonia),Carbon-1,Hydrogen-4(Methane).

Answer:

[tex]\frac{4}{5}[/tex] moles

Explanation:

The reaction equation is given as:

      4NH₃   +  5O₂  →  4NO  +  6H₂O

The number of moles of O₂ that completely reacted is given as 1 mole

To solve this problem, we are going to use a stoichiometric approach from the balanced reaction equation:

         5 moles of O₂ will react completely to produce 4 moles of NO

        1 mole of O₂ will therefore react to produce  x mole of NO

               5x  = 4

                 x  = [tex]\frac{4}{5}[/tex] moles of NO

Answer: 0.80 mole

Explanation:

Answer:

As 33

Explanation:

Symbol: As

Atomic Number/ Number of Protons: 33

The balanced equation

2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O

Given

Reaction

NaNO3 + PbO → Pb(NO3)2 + Na2O

Required

Balanced equation

Solution

aNaNO₃ + bPbO → Pb(NO₃)₂ + cNa₂O(Pb(NO₃)₂ ⇒coefficient 1 for the most complex compounds)

N, left=a, right=2⇒a=2

Na, left = a, right=2c⇒a=2c⇒2=2c⇒c=1

Pb, left = b, right=1⇒b=1

The equation becomes :

2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O

Answer:

Explanation:

When group 7 elements react , their atoms  gains  one  electron into their highest occupied  energy level ( outer shell) to form single negative - charged ion .

As you move down the group , the outer shells get increased  i.e an additional electron shell is added  thereby increasing the atomic radius  of the atom.  The electrons in the outer shell move further away from the nucleus as we go down the group .

Therefore the force of  attraction  between the shells and nucleus is decreased .

This makes attracting an extra electron difficult  . And so ability of the atom to attract electron to fill the outermost shell reduces which means the   reactiveness of the atom reduces.

Answer:

divide the moles by gram to get molar mass

use calculator and get yo ans

Answer:

C. decrease

Explanation:

Price increases on goods in the economy signal producers to decrease production.

Producers benefits more when the price of goods and services increases in the market. This makes them have more profit.

To maintain this profit level, they often decrease their production output to create a form of artificial scarcity within the market to sustain the price at which their goods trades.

Answer:

C

Explanation:

edge 2021

Answer:

Mass = 72.52 g

Explanation:

Given data:

Mass of hydrogen phosphate produced = ?

Mass of P₂O₅ react = 105.9 g

Solution:

Chemical equation:

P₂O₅ + 3H₂O     →     2H₃PO₄

Number of moles of P₂O₅:

Number of moles = mass/molar mass

Molar mass of P₂O₅ 283.9 g/mol

Number of moles = 105.9 g/ 283.9 g/mol

Number of moles = 0.37 mol

Now we will compare the moles of P₂O₅ with H₃PO₄ from balance chemical equation.

                     P₂O₅        :         H₃PO₄

                         1           :           2

                      0.37        :        2/1×0.37= 0.74 mol

Mass of H₃PO₄ :

Mass = number of moles × molar mass

Mass = 0.74 mol ×  98 g/mol

Mass = 72.52 g

Answer:

copper has 2+ ions in a sample of copper

Answer:

The desert was one covered by ocean water.

Explanation:

Answer:

colourless

Explanation:

hope it helps

Answer:

Your answer would be 2

Explanation:

The electron configuration for titanium is 1s22s22p63s23p63d24s2, according to the Jefferson Lab website. The element's 22 electrons are arranged in four energy levels surrounding the nucleus of the atom.

Electrons orbit the nucleus in energy levels, which are also called shells. These energy levels contain sub-shells, or orbitals, each of which holds a certain number of electrons. By looking at the electron configuration for titanium, it is possible to determine how its electrons are arranged.

There are two electrons in the s orbital of the first energy level. The second level contains eight electrons, with two in the s orbital and six in the p orbital. There are electrons in three orbitals of the third energy level. There are two in the s orbital, six in the p orbital and two in the d orbital. The fourth energy level has two electrons in its s orbital.

The study of chemicals and bonds is called chemistry.

The correct answer is 2.

The representation of electrons in the shell is called electronic configuration.  The electron configuration for titanium is [tex]1s^22s^22p^63s^23p^63d^24s^2[/tex],

Electrons orbit the nucleus in energy levels, which are also called shells.

These energy levels contain as follows:-

Each of which holds a certain number of electrons. By looking at the electron configuration for titanium, it is possible to determine how its electrons are arranged.  There are two electrons in the s orbital of the first energy level. The second level contains eight electrons, with two in the s orbital and six in the p orbital.

There are electrons in three orbitals of the third energy level. There are two in the s orbital, six in the p orbital, and two in the d orbital. The fourth energy level has two electrons in its s orbital.

Hence, the correct answer is A that is 2.

For more information, refer to the link:-

https://brainly.com/question/12985618

Answer:

32g

Explanation:

I just took the test and got it right

The mass of the copper is approximately 32.5 grams.

To find the mass of the copper, we can use the formula for heat:

Q = m * c * ΔT

where Q is the heat energy, m is the mass, c is the specific heat, and ΔT is the change in temperature.

In this case, we are given:

Q = 950 J (heat energy)

c = 0.39 J/(g·°C) (specific heat)

ΔT = 95.0°C - 20.0°C

= 75.0°C (change in temperature)

Substituting these values into the formula, we can solve for the mass (m):

950 J = m * 0.39 J/(g·°C) * 75.0°C

Dividing both sides of the equation by (0.39 J/(g·°C) * 75.0°C), we get:

m = 950 J / (0.39 J/(g·°C) * 75.0°C)

m ≈ 32.5 g

Therefore, the mass of the copper is approximately 32.5 grams.

Learn more about Heat, here:

https://brainly.com/question/30403247

#SPJ2

Answer:

B. Unbalanced

Explanation:

I learned this in 8th grade.

:))) This is the right answer.

Answer:1925ml

Explanation:

Do not quote me on this but with boyles law in mind as pressure tends to increase the volume of the container decreases. So I believe that you would need to multiply 550ml by the 3.5atm because p1v1=p2v2 so they both end up with the same end answer and if the pressure is 1.0atm then the answer would maybe be 1925ml. since 1*1925ml =1925ml and 3.5atm*550=1925ml (there is always a possibility this is wrong though)

Answer: the picture shows work for number 1,2,4,5,7

Explanation: number 3: as the pressure in the volume decreases, the volume increases causing it to expand and eventually blow.

number 6: because the temperature and the amount of gas don’t change, these terms don’t appear in the equation. What Boyle’s law means is that the volume of a mass of gas is inversely proportional to its pressure. This linear relationship between pressure and volume means doubling the volume of a given mass of gas decreases its pressure by half.

hope this helps :))

Answer:

Mass = 3 g

Explanation:

Given data:

Mass of magnesium = 2.4 g

Mass of oxygen = 2.4 g

Mass of magnesium oxide formed = ?

Solution:

Chemical equation;

2Mg + O₂    →     2MgO

Number of moles of oxygen:

Number of moles = mass / molar mass

Number of moles = 2.4 g/ 32 g/mol

Number of moles = 0.075 mol

Number of moles of magnesium:

Number of moles = mass / molar mass

Number of moles = 2.4 g/ 24 g/mol

Number of moles = 0.1 mol

now we will compare the moles of magnesium oxide with both reactant.

               Mg         :        MgO

                 2          :          2

               0.075    :        0.075

               O₂         :         MgO

                1          :           2

             0.1         :      2/1×0.1 = 0.2

Mass of magnesium oxide:

Mass = number of moles × molar mass

Mass = 0.075 mol × 40 g/mol

Mass = 3 g

Answer: B

Explanation: high tides and low tides are usually caused by the moon. The moons gravitational pull generates something called the tidal force. I’m not gonna go deep into this but yeah I think the answer is B

Answer:

:)

Explanation:

Answer:

6

Explanation:

The given reaction is aluminium with hydrochloric acid

2Al + 6HCl → 2AlCl3 + 3H2

the product is aluminium chloride and hydrogen gas.

We can clearly, calculate that there are 2*3=6 chlorine atoms in product side of the reaction.

Answer:

C. 6

Edg2021

Explanation:

Person is right.

Answer:

c

Explanation:

c

Answer:

Rubbing the comb caused static electricity to build up, so it attracted the water.

Answer:

[tex]\boxed {\boxed {\sf 29.4 \ Joules }}[/tex]

Explanation:

Gravitational potential energy can be found using the following formula.

[tex]PE_g= m*g*h[/tex]

When m is the mass, g is the gravitational acceleration, and h is the height.

The book has a mass of 2 kilograms. It's height is 1.5 meters above the ground. Assuming this is on Earth, the gravitational acceleration is 9.8 m/s².

[tex]m= 2 \ kg \\h= 1.5 \ m \\g= 9.8 \ m/s^2[/tex]

Substitute the values into the formula.

[tex]PE_g=2 \ kg * 1.5 \ m * 9.8 \ m/s^2[/tex]

Multiply the first two numbers together.

[tex]PE_g=(3.0 \ kg*m)( 9.8 \ m/s^2)[/tex]

Multiply again.

[tex]PE_g=29.4 \ kg*m^2/s^2[/tex]

[tex]PE_g= 29.4 \ J[/tex]

The gravitational potential energy of the book is 29.4 Joules.

Answer:

9584738373848838e7e8e

Answer:

Salt has long been used for flavoring and for preserving food. It has also been used in tanning, dyeing and bleaching, and the production of pottery, soap, and chlorine. Today, it is widely used in the chemical industry.

Answer:

See the answer below

Explanation:

When silver is added to dilute sulphuric acid, no reaction would occur. However, silver reacts with hot and concentrated sulphuric acid to produce silver sulphate, sulphur dioxide, and water.

The equation of the reaction is as below:

silver + sulphuric acid --> silver sulphate + water + sulphur dioxide

[tex]2Ag(s) + 2 H_2SO_4(aq) -->Ag_2SO_4 (s) + 2 H_2O (l) + SO_2 (aq)[/tex]

Answer:

[tex]P_2=3312torr[/tex]

Explanation:

Hello!

In this case, since here we have a pressure-temperature relationship, we need to use the Gay-Lussac's law in order to compute the final pressure as they are in a directly proportional relationship:

[tex]\frac{P_2}{T_2} =\frac{P_1}{T_1}\\\\P_2= \frac{P_1T_2}{T_1}[/tex]

Now, we plug in the given pressure and temperatures in Kelvins to obtain:

[tex]P_2= \frac{1307torr*(477+273)K}{(23+273)K}\\\\P_2=3312torr[/tex]

Best regards!

Answer:

Great question, here are a few! (╯°▽°)╯ ┻━┻

Explanation:

1. Atmosphere, The first difference between the Earth and space is the atmosphere.

2. radiation (high level of dangerous particles)!

3. gravity (weightlessness in space)

Well, simply put,

There is no Hydrogen Chloride being produced from this reaction, but instead it's Ammonium Chloride.