9 Focusing upward can crack a shidle.
You should use only laus tissue to clean a microscope lens
VITI
Find the Parts. Write the name of the microscope part next to the correct line in the picture.
9.
2.
10.
3.
5
.
a.
171
S.
6.
12.
7.
13.
8.
14.​

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

im pretty sure its b

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

answer///carbon;