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AVprozaik [17]
3 years ago
12

In which of the following is number of electrons the ion contains given correctly

Chemistry
1 answer:
Hitman42 [59]3 years ago
5 0
The answer is 

Ca^2+ has 18 electrons
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My question is on the image
Rainbow [258]

Answer:

Top left: RR Top right: Rr Bottom left: Rr Bottom right: rr

Explanation:

if both parents are heterozygous then the table will always look like this. the chances of the offspring being heterozygous are 50%. the offspring has a 25% chance of having two recessive traits and a 25% chance of having two dominant traits.

4 0
3 years ago
a substance that changes the rate of the reaction and is not consumed in the reaction 1 catalyst 2. a uniform mixture of molecul
umka21 [38]

Answer by YourHope:


Hi! :)


Answers:


A catalyst is a substance that changes the rate of the reaction, and is not consumed in the reaction!


A solution is a uniform mixture of molecules or ions of one substance in another!


A solute is the substance dissolved in a solution!


A solution is the substance that does the dissolving in a solution!


Have a BEAUTIFUL day~

4 0
3 years ago
Read 2 more answers
Picking up a hot cup of coffee is an example of conduction, convection, or radiation.
tino4ka555 [31]

Answer:

Its conduction

Explanation:

Its when heat is transferred from a object to something else.

:/ do you not have definitions  

8 0
3 years ago
Read 2 more answers
NEED HELP ON 17,18,19,20,21,22,23. ONLY IF YOU ARE POSITIVE ABOUT THE ANSWER!!!!
Alex777 [14]

Answer:

17. D. Chemical change

18. C. Cell wall

19. D. To transfer matter and energy within and between organisms.

20. A. Transporting materials

21. C. Carbon dioxide

22. A. Cellular respiration

23. C. Produce food and give off oxygen

Explanation:

I have been able to supply the correct answers. The cell wall functions as a structure that provides structural support and protection to the cell. It is tough, flexible and at times rigid. In a chemical change, new materials with new properties are manufactured. So, the process of photosynthesis is a chemical change.

The endoplasmic reticulum actually transports material. It transports materials like protein and lipids made within the cell and sends it to where they are needed.

Carbon dioxide  is the the gas that animals give off and plants use it during photosynthesis. Cellular respiration involves the activities that result to the breaking down of food in order to release energy.

8 0
3 years ago
In the following reaction, how many grams of nitroglycerin C3H5(NO3)3 will decompose to give 25 grams of CO2?
gogolik [260]

4C₃H₅(NO₃)₃_{(l)} ------> 12CO₂_{(g)} + 6N₂_{(g)} +  10H₂O_{(g)}  +  O₂_{(g)}

mol of CO₂  =  \frac{mass}{molar mass}

                    =  \frac{25g}{44.01 g/mol}

mol ratio of  CO₂ :  C₃H₅(NO₃)₃

                    12    :     4

∴  if  mole of CO₂  =  0.568 mol

then   "       "   C₃H₅(NO₃)₃  =  \frac{0.568 mol}{12}  *  4

                                           = 0.189 mol


∴ mass of nitroglycerin  =  mole  *  Mr

                                       =  0.189 mol  *  227.0995 g / mol

                                       =  43.00 g

8 0
3 years ago
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