Moles = weight in grams / molecular weight.
So I would divide the "grams of barium" by its molecular weight (which is 137.3) to get "moles of barium". :)
Answer:
Density, 
Explanation:
Given that,
Mass of marble slab is 38.6 kg or 38600 g
The dimensions of the slab is 23 cm × 17 cm ×4 cm
We know that the density of an object is given in terms of its mass volume as follows :
So, the density of the marble slab is 
Answer: <u>Hydrogen.</u>
Explanation: <u>One problem with fuel-cell cars is that hydrogen gas is not readily available in pure form.</u> Fuel cell vehicles use hydrogen gas to power an electric motor. Unlike conventional vehicles which run on gasoline or diesel, fuel cell cars and trucks combine hydrogen and oxygen to produce electricity, which runs a motor. Hope this helps ^-^.
Answer:
Applied
Explanation:
Since Brent is using his existing scientific knowledge to create a new product or invention then this falls under the category of Applied Research. Applied research includes using any theoretical or proven information in order to create something physical that can be used in our real-life world. Usually, this research focuses on solving a problem through the use of technology. Thisis exactly what Brent is trying to do by creating a new plastic that does not have harmful chemicals that can hurt babies in the long term.
500 because F1 is 500 x 1. Tell me if I’m right. Good luck!
