can you help me with this question ​

Answer:

The ionisation energy increases.

Explanation:

This is because the force of attraction between the electrons and the positive nucleus will increase

Answer:

mushroom

mold

spore cases

hyphae

fungus

Answer:

i)a. P & R

b. Q& S

ii) R

iii) Atomic no & Atomic radius

2)a. C4H10

b. CH3Cl

Answer:

this claim may not be accurate because the blog is produced by someone who is not an expert in the field of human psychology.

Explanation:

Answer:

this claim may not be accurate because the blog is produced by someone who is not an expert in the field of human psychology.

Explanation: give the branliest to the otherperson :)

Answer:

1. The theoretical yield of NiO is 5.09g.

2. O2 is the limiting reactant.

3. The percentage yield of NiO is 95.5%

Explanation:

Step 1:

The balanced equation for the reaction is given below:

2NiS2(s) + 5O2(g) —> 2NiO(s) + 4SO2(g)

Step 2:

Determination of the masses of NiS2 and O2 that reacted and the mass of NiO produced from the balanced equation. This is illustrated below below:

Molar mass of NiS2 = 59 + (32x2) = 123g/mol

Mass of NiS2 from the balanced equation = 2 x 123 = 246g

Molar mass of o3= 16x2 = 32g/mol

Mass of O2 from the balanced equation = 5 x 32 = 160g

Molar mass of NiO = 59 + 16 = 75g/mol

Mass of NiO from the balanced equation = 2 x 75 = 150g

Summary:

From the balanced equation above, 246g of NiS2 reacted with 160g of O2 to produce 150g of NiO

Step 3:

Determination of the limiting reactant. This can be obtain as follow:

From the balanced equation above, 246g of NiS2 reacted with 160g of O2.

Therefore, 11.2g of NiS2 will react with = (11.2 x 160)/246 = 7.28g of O2.

From the above calculation, we can see that it will take a higher mass of O2 i.e 7.28g than what was given i.e 5.43g to react completely with 11.2g of NiS2.

Therefore, O2 is the limiting reactant and NiS2 is the excess reactant.

1. Determination of the theoretical yield of NiO.

In this case, the limiting reactant will be used as all of it is consumed in the reaction. The limiting reactant is O2.

From the balanced equation above, 160g of O2 reacted to produce 150g of NiO.

Therefore, 5.43g of O2 will react to produce = (5.43 x 150)/160 = 5.09g of NiO.

Therefore, the theoretical yield of NiO is 5.09g.

2. The limiting reactant is O2. Please review step 3 above for explanation.

3. Determination of the percentage yield of NiO. This is illustrated below:

Actual yield of NiO = 4.86g

Theoretical yield of NiO = 5.09g

Percentage yield =..?

Percentage yield = Actual yield /Theoretical yield x 100

Percentage yield = 4.86/5.09 x 100

Percentage yield of NiO = 95.5%

Answer:

The process to use this knowledge is explained as below:

Explanation:

1. Farmer should use an indicator to check the pH value of the soil of the field of the farm.

2. If the field or the farm has alkali soil add acid to reduce the pH value.

3. If the soil of the farm is acidic for the crop add alkali to increase the pH value.

4. It will be a neutralization reaction and changes the pH value of the farm.

5. Weather/leeching into the surrounding soil/plant or animal waste will lead to a change in pH value over time.

6. The pH value will need to be regularly monitored and adjusted.

Answer:

Another eight cups of pure water will be required.

Explanation:

Start by calculating the amount (in cups) of vinegar in these six cups:

Therefore, if these six cups of solutions were mixed, the mixture would contain [tex]0.05 + 0.20 + 0.45 = 0.70[/tex] cups of vinegar. Also, the mixture is supposed to have a volume of six cups. Therefore, the concentration of this six-cup mixture would be:

[tex]\displaystyle \frac{0.70\; \rm cups}{6\; \rm cups} \approx 12\%[/tex].

In other words, if these six cups of vinegar-water solutions are mixed, it would be necessary to dilute (by adding more water) before reaching the concentration of [tex]5\%[/tex].

The goal is to dilute this solution with [tex]0.70[/tex] cups of vinegar to a concentration of [tex]5\%[/tex]. Consider: what would be the volume the solution after dilution?

The volume of a solution can be found from the quantity and concentration of its solute:

After dilution, the volume of this solution would be:

[tex]\displaystyle \frac{0.70\; \rm cups}{0.05} = 14\; \rm cups[/tex].

At this moment, this solution only has a volume of six cups. Therefore, [tex]14 - 6 = 8[/tex] cups of pure water will be required.

Answer:

organisms in rain water and the number of organisms in pond water because the dependant variable never changes

Explanation:

because the dependant variable never changes

Answer:

Electrons.

Explanation:

Answer:

oh yes chemical oxidation removes

Explanation:

but i m not sure hope it is right i haven't looked book this time

Answer:  A. 28

If we aren't talking about an isotope, then the number of neutrons and the number of protons in the nucleus are the same. Each proton weighs one atomic unit, and the same can be said about a neutron as well. So half of the weight is from the protons and half is from the neutrons. The electrons are extremely small relative to the protons that their weight is negligible.

Answer:

C

Explanation:

APEX

the conclusions of an scientific experiment tell why the data support or reject the hypothesis. Thus option C is correct.

Scientific experiment involve asking different scientific questions, making hypothesis, design experiment, result and conclusion.

A good scientific experiment should have some facts which can be answered by using data analysis.

The types of scientific questions are Verification questions, Theory questions, Experimental questions

The verification question can be solved by collecting data from observation, which include characteristics or properties of a subject.

A theory question refers an imaginative exercise, is not fictional, depend on prior knowledge of the phenomenon being asking about.

The scientific question or an experimental question used to compare the element of a system when altered, it involves variables such as independent, dependent and controlled variables.

Thus option C is correct.

Learn more about scientific experiment, here:

https://brainly.com/question/1347425

#SPJ2

Answer:

Noble gases are a unique set of elements in the periodic table because they don't naturally bond with other elements.

Explanation:

HAVE A GOOD DAY!

Answer:

The answer is Noble Gases!!

Explanation:

Hope i helped yall! Have a super fantastic day!! Play Among Us! (Of course when your done with school) lol, jk, but u can!! Byes yall!

Answer:

3.0×10³ mL

Explanation:

The following data were obtained from the question:

Volume of the container = 3L

We can find the volume in millilitres as follow:

1L = 1000mL

Therefore, 3L = 3 x 1000 = 3000mL

Therefore, there are 3000mL in the container.

To express 3000mL to two significant figure we simply write as follow:

3000mL => 3.0×10³ mL

Answer:

Food in the stomach that is high in protein will dilute absorption of alcohol in your stomach :) therefore always drink with food in your stomach, just drinking alchol without food will have serious consequences on helath.

Explanation:

Answer:

D. Gases have weak intermolecular forces between them

Explanation:

The vegetables like spinach,methi leaves,cauliflower,peas are preserved in our homes by the sun-drying method.

Hope this helps ☺☺

Answer:

Answer:

) Molar concentration =1000*2.54/(127*250) ;since molarity=1000*W/M*V

=0.08 M here W=amount of solute in gm

M= molecular weight of solute

v=volume of solution in ml or cm3

2)% concentration (w/v) =(2.54/250)*100=1.016%

Explanation:

Answer:

c is the speed of light

Explanation:

E: energy

m: mass

c2: speed of light squared

Answer:

the bond that hold the ionic solids together is the ionic bond while the force that holds them together is the electrostatic force.

Explanation:

Answer:

chemcial energy :)

Explanation:

Answer:

at the light = radiant energy

at the line = electical energy

at the battery = chemical energy

Answer: Because alchemy was based on mystical belief instead of the scientific method.Soo.. Chemistry uses experiments to test ideas whereas alchemy used superstitious practices.

Explanation:

Answer:

that was because Alchemy was based on experimentation and had little basis in Science, while Chemistry utilizes both experimentation and scientific practices.

Explanation:

Answer:

Explanation:F

the relative mass of an atom or molecule is hence considered by considering a mass of a light atom and relating the mass of other atoms or molecules to it

Answer:

320.23g of CH3OH.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

CO(g) + 2H2(g)—> CH3OH(l)

Next, we shall determine the masses of CO and H2 that reacted and the mass of CH3OH produced from the balanced equation. This is illustrated below below:

Molar mass of CO = 12 + 16 = 28g/mol

Mass of CO from the balanced equation = 1 x 28 = 28g

Molar mass of H2 = 2x1 = 2g/mol

Mass of H2 from the balanced equation = 2 x 2= 4g

Molar mass of CH3OH = 12 + (3x1) + 16 + 1 = 32g/mol

Mass of CH3OH from the balanced equation = 1 x 32 = 32g

From the balanced equation above,

28g of CO reacted with 4g of H2 to produce 32g of CH3OH.

Next, we shall determine the the limiting reactant. This is illustrated below:

From the balanced equation above,

28g of CO reacted with 4g of H2.

280.2g of CO will react with =

(280.2 x 4)/28 = 40.03g of H2.

From the calculations made above, we can see that only 40.03g out of 50.5g of H2 is required to react completely with 280.2g of CO.

Therefore, CO is the limiting reactant and H2 is the excess reactant.

Finally, we shall determine the mass of methanol, CH3OH produced from the reaction.

In this case, the limiting reactant will be used because it will give the maximum yield of the reaction since all of it is used up in the reaction. The limiting reactant is CO and the mass of methanol, CH3OH produced can be obtained as follow:

From the balanced equation above,

28g of CO reacted to produce 32g of CH3OH.

Therefore, 280.2g of CO will react to produce = (280.2 x 32)/28 = 320.23g of CH3OH.

Therefore, 320.23g of CH3OH were produced from the reaction.

Answer:

0.086J/g°C

Explanation:

The following data were obtained from the question:

Mass (M) = 30g

Initial temperature (T1) = 10°C

Final temperature (T2) = 45°C

Change in temperature (ΔT) = T2 – T1 = 45°C – 10°C = 35°C

Heat (Q) released = 90J

Specific heat capacity (C) of wood =..?

We can obtain the specific heat capacity of the wood as follow:

Q = MCΔT

90 = 30 x C x 35

Divide both side by 30 x 35

C = 90/(30 x 35)

C = 0.086J/g°C.

Therefore, the specific heat capacity of the wood is 0.086J/g°C.

Answer:

Coke, coal gas, gas carbon, ammonia liquor, and coal oil 

Answer:

A) anaerobic respiration

B) photosynthesis

C) breathing

Answer: The mass of [tex]4.65\times 10^{22}[/tex] molecules of phosphorus pentoxide is 20.5 g

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text {avogadro's number}}=\frac{4.65\times 10^{22}}{6.023\times 10^{23}}=0.0772moles[/tex]

1 mole of [tex]P_2O_5[/tex] weigh =  283.9 g

Thus 0.0772 moles  of [tex]P_2O_5[/tex] weigh = [tex]\frac{283.9}{1}\times 0.0722=20.5g[/tex]

Thus the mass of [tex]4.65\times 10^{22}[/tex] molecules of phosphorus pentoxide is 20.5 g

Answer:

waves that move through matter only are called mechanical waves.

waves that move through space only are called electromagnetic waves.

Waves that move through matter only are called

(mechanical) waves.

Waves that move through space are called

(electromagnetic) waves.

Could I get a brainliest please?