All categories

3 years ago

Hello I need help very bad!!!

Chemistry

1 answer:

Oksanka [162]3 years ago

6 0

D. Cell membrane: surrounds a cell and allows substances to pass in and out

You might be interested in

At what temperature would 2.10moles of N2 gas have a pressure of 1.25atm and fill a 25.0 L tank

hodyreva [135]

Answer:

$\large \boxed{\text{-92 $^{\circ}$C}}$

Explanation:

We can use the Ideal Gas Law and solve for T.

pV = nRT

Data

p = 1.25 atm

V = 25.0 L

n = 2.10 mol

R = 0.082 06 L·atm·K⁻¹mol⁻¹

Calculations

1. Temperature in kelvins

$\begin{array} {rcl}pV & = & nRT\\\text{1.25 atm} \times \text{25.0 L} & = & \rm\text{2.10 mol} \times 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times T\\31.25&=&0.09847T\text{ K}^{-1}\\T& = &\dfrac{31.25}{\text{0.098 47 K}^{-1}}\\\\& = &\text{181 K}\end{array}$

2. Temperature in degrees Celsius

$\begin{array} {rcl}T & = & (181 - 273.15) \, ^{\circ}\text{C}\\& = & -92 \, ^{\circ}\text{C}\\\end{array}\\\text{The temperature of the gas is $\large \boxed{\mathbf{-92 \, ^{\circ}}\textbf{C}}$}$

8 0

3 years ago

When glucose is fermented, ethanol is formed together with ………………….

levacccp [35]

Answer:

carbon dioxide and oxygen

3 0

3 years ago

White vitriol molecular formula and green vitriol molecular formula??

IgorC [24]

Answer:

Green vitriol- FeSO4·7H2O

white vitriol- ZnSO₄

8 0

3 years ago

A box contains a mixture of small copper spheres and small lead spheres that are the same size. The total volume of both metals

Katena32 [7]

38% is the answer to the question

6 0

3 years ago

Please help!! Having trouble with this

Gnoma [55]

For #4 first find the molar mass(M) of copper then use that and the mass (m) n=m/M to find moles(n) using moles and the volumes find the concentration using c=n/V

7 0

3 years ago