USB-C to HDMI adapter connect with DisplayPort
To get the best results I would recommend using the following : 




Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter Link
Mini-DP to DisplayPort Cable to the monitor Link



Probably this one might work https://www.amazon.com/Plugable-DisplayPort-1-8m-Chromebook-Thunderbolt/dp/B01EXKDRAC

Hope it helps!