Ottawa Senators rear guard Erik Karlsson scored 5:45 into the second, while Colorado Avalanche winger Gabriel Landeskog completed the scoring early in the third period.
Russia and Sweden have 15 points at the top of Group S, four ahead of the Czech Republic in third.
Meanwhile over in the United States, Henrik Lundqvist made 22 saves to lead the New York Rangers over Washington 2-1 and into the NHL Eastern Conference finals on Saturday. It's the first time that the Swede has advanced to the conference final. The Rangers defeated the Capitals four games to three in the best-of-seven second-round series and will play the New Jersey Devils for a berth in the NHL Stanley Cup Final.