Answer:
A. the elements are substance which have the same nomba of electrons in their outermost shell
Explanation:
plz give me brainiest
Answer:
16400g
Explanation:
The amount of Calcium nitrate {Ca(NO3)2} that will be needed can be calculated as follows:
Molarity (M) = number of moles (n) ÷ volume (L)
According to this question, molarity = 0.2M, volume = 500L
number of moles = molarity × volume
number of moles (n) = 0.2 × 500
n = 100moles
Using mole = mass/molar mass
Molar mass of Ca(NO3)2 = 40 + {14 + 16(3)}2
= 40 + (14 + 48)2
= 40 + 62(2)
= 40 + 124
= 164g/mol
Mass = mole × molar mass
mass = 100 × 164
mass = 16400g of Ca(NO3)2
Your breathing is likely to speed up when your cells need more energy. Why? Well, faster breathing is likely to occur when your cells need more energy because doing things that force your muscles to work harder cause sweat glands often (which originates from the endocrine system), and to recuperate energy, your breathing rate increases so that more energy is circulated into your body.
Your final answer: The answer is D.
Answer: i would say b for the first one!
2nd pic: i would say c!
3rd pic: b or c!
Explanation:
omg this is what i think they are! sorry if its wrong!