The ornamental design for a chemicalsprayer, as shown and described.
FIG. 1 is an upper right front perspective view of a chemical sprayer showing my new design in accordance with a first embodiment of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a sectional view thereof taken along line 7-7 of FIG. 4.
The broken line showing in FIGS. 1 and 7 is included for the purpose of illustrating and forms no part of the claimed design.