emilyfloyd13 emilyfloyd13

03-09-2020
Chemistry

contestada

is helium gas a mixture or pure substance

Respuesta :

tatamendez tatamendez

03-09-2020

An element is a pure substance as well, because if we fill up a balloon with just helium gas, it will only contain helium atoms. On the periodic table of elements, helium is element number 2 , and so that should tell you that it's an element of course.

Answer Link

Otras preguntas

what are the importance of computer software

does anyone understand these?

3. At which ONE of the following temperatures do bacteria grow best? O 4°C O 37°C O -18°C O 70°C

Many migrants have had their caps stolen, so they wrap their heads in T-shirts. They gaze enviously at villagers cooling themselves in streams and washing off a

does this picture on the foot look like it might be gangrene?

The half-life of Iodine-131 is 8.0252 days. If 14.2 grams of I-131 is released in Japan and takes 31.8 days to travel across the Pacific, how much I-131 will be

2(x + 2) + 5(x + 5) = 4(x-8) + 2(x - 2)

importance of potassium in plants (any 4 points)

In a random sample of 250 students, 150 were in favor of longer hours at the school library. At 98% level of confidence, what is the margin of error? Select one

NH4Cl + AgNO3 → AgCl + NH4NO3