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3 years ago

Who is boo johnson ??

Chemistry

2 answers:

matrenka [14]3 years ago

7 0

a skate border? i think ?

Advocard [28]3 years ago

7 0

About
California professional skateboarder known for being sponsored by SUPRA footwear, DGK, BONES Wheels, and many other skate companies.

Before Fame
He began skateboarding seriously around 2009.

Trivia
In addition to his skateboarding career, he is also incredibly popular on social media, with over 100,000 Instagram followers.

Family Life
Originally from Tehachapi, California, he moved to Long Beach while continuing his skateboarding career. He has frequently posted pictures of his girlfriend on Instagram.

Associated With
He is a popular California-born skateboarder like Nyjah Huston.

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A flashbulb of volume 1.70 mL contains O2(g) at a pressure of 2.30 atm and a temperature of 18.0°C. How many grams of O2(g)

Lady bird [3.3K]

Answer:

0.0001637 mol

Explanation:

PV = nRT

Very important formula in chem

2.3 atm * 0.0017 L = n * 0.082057 * 291 K

= 0.0001637 mol O2

This concept is very important in chem, practice it.

7 0

3 years ago

A 3.540-g sample of an unknown metal M is burned in the presence of excess oxygen, producing the oxide M2O3(s) and liberating 18

pshichka [43]

Answer:

a) Sm

Explanation:

Hello,

This substantiation could be done by knowing how to compute the released energy for 1 mol the oxide. Thus, for Sm, the computation turns out into:

$Q=-1823.0\frac{kJ}{mol}*\frac{1molSm_2O_3}{348.72gSm_2O_3} *3.540gSm_2O_3\\Q=-18.5kJ$

The sign just indicates that the heat is released due to the chemical reaction and it matches with the indicated heat in the statement.

Best regards.

3 0

3 years ago

If a calcium atom can give off two electrons in a reaction with

Alenkinab [10]

Answer:

c. Ca3N2

Explanation:

7 0

3 years ago

Pls tell me how to solve this!

Anna35 [415]

Answer:

12 seconds

Explanation:

Time taken by 50cm³ of oxygen to diffuse from pinhole

= 1 minute = 60 seconds

⠀

$\textsf{ Rate of oxygen} \sf (O_2) = \frac{50}{60}$

⠀

Let time taken by 50cm³ of hydrogen to diffuse from pinhole = t seconds

⠀

$\textsf {Rate of hydrogen } \sf(H_2) = \frac{50}{t}$

⠀

According to the formula

$\sf \frac{Rate \: of \: hydrogen(H_2)}{Rate \: of \: oxygen(O_2) } = \sqrt{ \frac{Molar \: mass \: of \: O_2}{Molar \: mass \: of \: H_2} }$

⠀

$\large \sf \frac{50}{t} \div \frac{50}{60} = \sqrt{ \frac{\cancel{32}\small 16}{\cancel2} } \\ \\ \sf \large \frac{ \cancel{50}}{t} \times \frac{60}{ \cancel{50}} = \sqrt{16} \\ \\ \sf \large \frac{60}{t} = 4 \\ \\ \sf \large \frac{ \cancel{60} \: \small12}{ \cancel4} = t \\ \\ \large \underline{ \boxed{ \tt t = 12 \: seconds}}$

⠀

<h3>Henceforth, the time taken by 50cm³ of hydrogen to diffuse is 12 seconds. </h3>

⠀

<h2>Thank you!</h2>

8 0

2 years ago

Describe a situation where scientific knowledge was gained through doing an experiment

mamaluj [8]

Scientific knowledge can be gained through experiment by doing a thorough experimental procedure that will enable to answer the objectives of the experiment that will lead to a scientific knowledge. Through experimentation you can know the behavior of a variable with respect to a certain variable. This can also answer some knowledge gap about certain topic

8 0

3 years ago

Read 2 more answers