help me solve. this is science. Which one is it

Answer:

  dissolved

Explanation:

The figure shows sodium chloride is in solution. It gets that way by being dissolved.

Answer:

A cell

Explanation:

Answer:

The ammonia production design process has two design requirements;

Explanation:

In the following process, ammonia is provided by natural gas:

[tex]H_2 + RSH \to RH + H_2S\\\\H_2S + ZnO \to ZnS + H_2O \ \ (Waste \ water)\\\\CH_4 + H_2O \to CO + 3H_2\\\\CO + H_2O \to CO_2 + H_2\\\\[/tex]

Ammonia would then be generated in a process called also as Haber-Bosch process by responding to produced hydrogen to nitrogen throughout the presence of catalysts.

[tex]3H_2 + N_2 \to 2NH_3[/tex]

Answer:

Sustainable renewable energy production of hydrogen.

Sustainable use of another thermal ammonia-water process to retrieve ammonia throughout the wastewater.

Explanation:

Answer:

R- reactants

arrow- yields

p- products

Explanation:

Answer:

a moving car

Explanation:

because The faster an object is moving, the more kinetic energy it has. Any object that is moving has kinetic energy – the moving object has energy because of its motion.

Answer:

6g/mL

Explanation:

Given parameters;

Mass of the unknown substance  = 18g

Volume of water before the mass is introduced  = 5mL

Volume of water after the mass is introduced  = 8mL

Unknown:

Density of the mass = ?

Solution:

Density is the mass per unit volume of a substance.

             Density  = [tex]\frac{mass}{volume}[/tex]

Mass is the amount of matter in a substance

Volume is the space occupied by a body

Volume of the body  = 8mL - 5mL = 3mL

Insert the parameters and solve;

             Density  = [tex]\frac{18g}{3mL}[/tex]   = 6g/mL

Answer:

I think its 6g or 16g but im pretty sure its 6g

Explanation:

Answer: The answer is biotic

Explanation:Mushrooms are biotic because they are living things. Abiotic means non living, so these are factors in the environment that influence a living thing's life and chance of survival

Answer: jdusjzj bacteria germs

Explanation:

Answer:

Q = -811440 J

Explanation:

Given data:

Mass of oil = 2.76 Kg (2.76× 1000 = 2760 g)

Initial temperature = 191 °C

Final temperature = 23°C

Specific heat capacity of oil = 1.75 J/g.°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 23°C - 191 °C

ΔT = -168°C

Q = 2760 g ×1.75 J/g.°C  ×-168°C

Q = -811440 J

Negative sign show heat is released.

Answer:

load

Explanation:

the load is the work done by the effort on the machine

Answer:

Option A. 1.8×10²⁴ molecules.

Explanation:

Data obtained from the question include:

Number of mole of methane = 3 moles

Number of molecules of methane =?

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ molecules.

Thus, 1 mole of methane equally contains 6.02×10²³ molecules.

With the above information in mind, we can obtain the number of molecules in 3 moles of methane as follow:

1 mole of methane contains 6.02×10²³ molecules.

Therefore, 3 moles of methane will contain = 3 × 6.02×10²³ = 1.8×10²⁴ molecules.

Thus, 3 moles of methane contains 1.8×10²⁴ molecules.

Answer:

12 Ethene gas, CH is completely burned in excess oxygen to form carbon dioxide and water

The equation for this exothermic reaction is shown.

CH 30, - 200, 2H,0

The table shows the bond energies involved in the reaction

bond

bond energy

(kJ/moly

614

413

C-C

CHH

0 0

СО

495

799

O-H

467

What is the total energy change in this reaction?

A-954 kJ/mol

B-1010 kJ/mol

C-1313 kJ/mol

D-1359 kJ/mol

Explanation:

thats all you said

Answer:

See explanation

Explanation:

The image attached describes the formation of magnesium fluoride.

Magnesium has two valence electrons while fluorine has seven valence electrons. Magnesium can now transfer one electron each to two fluorine atoms thereby forming the compound MgF2.

This has been shown pictorially in the image attached to this answer.

Explanation:

A and D. the answer is a and d

Answer:

A

Explanation:

The mentioned reaction between vinegar and baking soda is a type of chemical reaction and endothermic reaction as the reaction proceeds with absorption of energy which turns the mixture cold.

An endothermic reaction is defined as a chemical reaction which is a thermodynamic process accompanied by an increase in enthalpy of the system.In this process, a system absorbs energy from the surroundings which is mainly thermal energy.

Thus an endothermic reaction leads to an increase in the temperature of the system with a decrease in the temperature of the surroundings.Endothermic reactions usually involve the formation of bonds which requires input of energy.In endothermic reactions, entropy of the surrounding decreases.

Many endothermic processes involve the physical changes rather the chemical changes.In an endothermic reaction ,the potential energy of products is greater than that of reactants.

Learn more about endothermic reaction,here:

https://brainly.com/question/23184814

#SPJ2

Answer:

b . Irradiated food is shown to not be radioactive.

Explanation:

If it can be proven that irradiated food is not radioactive, then it will effective dispute the idea that irradiated food are less safe to eat.

If it can be proven, that this is true, then it will challenge the idea that irradiated foods are not safe.

Answer:

The water cycle or hydrologic is a continuous cycle where water evaporates, travels into the air and becomes part of a cloud, falls down to earth as precipitation, and then evaporates again. ... These areas are usually close to oceans or large bodies of water that allow more water to evaporate and form clouds.

Explanation:

Answer:

B: Presence of ashes

Explanation:

Burning molecules turns them into other molecules

Answer:B

Explanation:

Answer:It is C i got it correct

Explanation:

Answer:

C. giving the country a larger role in protecting other countries in the

Americas.

Explanation:

The volume of NH₃ produced at STP : 0.237 L

Reaction

N₂ + 3H₂ → 2NH₃

1 mol = 6.02 x 10²³ particles

9.6 X 10²¹ molecules of Hydrogen, mol :

[tex]\tt \dfrac{9.61\times 10^{21}}{6.02\times 10^{23}}=1.596\times 10^{-2}~moles[/tex]

mol H₂ : mol NH₃ = 3 : 2

mol NH₃ :

[tex]\tt \dfrac{2}{3}\times 1.596\times 10^{-2}=0.0106[/tex]

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

The volume of NH₃ :

[tex]\tt 0.0106\times 22.4=0.237~L[/tex]

Answer:

eachother or different type of flower

Explanation:

1. high

You are correct.

Cold region have more air pressure because air is denser.

a. k=0.256/day

b.sample of Au-198 remains after seven days : 1.67 g

1. A half-life of 2.7 days⇒t1/2=2.7 days

The half-life can be expressed in a decay constant( λ)

[tex]\tt \displaystyle t_ {1/2} = {\dfrac {\ln (2)} {\lambda}}\\\\\lambda(or~k)=\dfrac{0.693}{2.7}=0.256/day[/tex]

2. We can use formula : (integrated rate law) :

[tex]\tt ln[A]=-kt+ln[Ao]\\\\ln(\dfrac{Ao}{A})=kt[/tex]

Ao=10 g

t=7 days

k=0.256/day

[tex]\tt ln(\dfrac{10}{A})=0.256\times 7\\\\ln(\dfrac{10}{A})=1.792\\\\e^{1.792}=\dfrac{10}{A}\\\\6=\dfrac{10}{A}\rightarrow A=1.67~g[/tex]

The mass of Au-198 that remains after seven days is 1.62 g.

We know that radioactive decay is a first order reaction hence;

k = 0.693/ t12

Where;

k = rate constant

t12 = half life

k =  0.693/ 2.7 days = 0.26 day-1

Using;

N =Noe^-kt

No = amount of radioactive material initially present

N = mass of radioactive substance present at time t

N = 10 e^-(0.26 × 7)

N = 1.62 g

The mass of Au-198 that remains after seven days is 1.62 g.

Learn more about radioactive decay: https://brainly.com/question/14077220

Given :

An atom of a certain element has 12 protons, 14 neutrons, and 2 valence electrons.

To Find :

The name of this element.

Solution :

We know, element with atomic number ( number of protons ) 12 and valance electrons is Magnesium.

Now, isotope of magnesium of proton with 14 neutrons is Mg-16 .

Therefore, name of element is Mg-16 .

Hence, this is the required solution.

if your serious about this question then it is 5

Answer:

The volume is 3.09 ft^3.

Explanation:

The formula for volume is mass divided by density. 10.0 g / 11.4 g/cm^3 = 0.87719. Converted to cubis foot is 3.09 ft^3. I hope this helps you.

[tex]\huge\boxed{Sublimation}[/tex]

Sublimation is a process in which the solid molecules gain energy from their surrounding and they now have enough energy to overcome the force of attraction with the neighboring molecules, thus they escape into the surrounding without going through the liquid phase, that means they directly jump to the vapor phase.

Those process which absorb energy from their surrounding to form the product are called endothermic process. Since the SUBLIMATION requires additional energy, it is an endothermic change.

Answer:

sentence 2, sentence 2, sentence 1

Explanation:

it was right for me on edge 2020

Answer:

1. Fred visited Nick after his graduation.

2. After Nick's graduation, Fred visited him.

1. Marie told Sarah that she makes great spaghetti.

2. Marie told Sarah, "You make great spaghetti."

1. John broke the fence with his bike.

2. John's bike hit a fence and it broke.