What is the mass of the atom explain how you got it. For brainliest etc

Explanation:

Firstly, the mass of 1 electron is 0.000549

in the diagram theres a total of 4 electrons

0.000549×4=0.002196 in the electron shell.

There's 3 protons and 4 Neutrons, they have the same mass so you can add them to make it more simple, 7×1.67×10^-27=1.169×10^−26 in the nucleus

I'm not sure if you meant the mass of the whole atom but if it is then The protons and Neutrons added together with the electrons would make 2.196×10^-3

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.