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2 years ago

Consider a 400 mL solution of 0.10 M \ce{NaOH}NaOH. Calculate the mass of solid \ce{NaOH}NaOH required to achieve this solution.

Chemistry

1 answer:

AnnyKZ [126]2 years ago

3 0

Answer:

Is 40.10 ml

Explanation:

i've dome it before

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Convert 59,800 cg/L to g/mL

alexgriva [62]

To convert the given value to the desired one, use the proper unit conversions and dimensional analysis. Use the following conversion for the first set.

1 g = 100 cg
1 L = 1000 mL

Using the concept presented above,

V = (59800 cg/L)(1 g/100 cg)1 L/1000 mL)
V = 0.598 g/mL

6 0

3 years ago

When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find

Art [367]

when iron and oxygen the reactin form Fe2O3 balance equation for this is <span>4Fe + 3O2---> 2Fe2O3
9moles of O2 are needed to produce 6mol of Fe2O3 since the ratio of oxygen to iron(II)oxide is 3:2
hope its help</span>

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3 years ago

An electron in the hydrogen atom makes a transition from an energy state of principal quantum number ni to the n = 2 state. If t

topjm [15]

Answer:

$\boxed{3}$

Explanation:

The Rydberg equation gives the wavelength λ for the transitions:

$\dfrac{1}{\lambda} = R \left ( \dfrac{1}{n_{i}^{2}} - \dfrac{1}{n_{f}^{2}} \right )$

where

R= the Rydberg constant (1.0974 ×10⁷ m⁻¹) and

$\text{$n_{i}$ and $n_{f}$ are the numbers of the energy levels}$

Data:

$n_{f} = 2$

λ = 657 nm

Calculation:

$\begin{array}{rcl}\dfrac{1}{657 \times 10^{-9}} & = & 1.0974 \times 10^{7}\left ( \dfrac{1}{2^{2}} - \dfrac{1}{n_{f}^{2}} \right )\\\\1.522 \times 10^{6} &= &1.0974\times10^{7}\left(\dfrac{1}{4} - \dfrac{1}{n_{f}^{2}} \right )\\\\0.1387 & = &\dfrac{1}{4} - \dfrac{1}{n_{f}^{2}} \\\\-0.1113 & = & -\dfrac{1}{n_{f}^{2}} \\\\n_{f}^{2} & = & \dfrac{1}{0.1113}\\\\n_{f}^{2} & = & 8.98\\n_{f} & = & 2.997 \approx \mathbf{3}\\\end{array}\\\text{The value of $n_{i}$ is }\boxed{\mathbf{3}}$

7 0

3 years ago

Gas particles do not have much energy of motion.<br><br> True or False?

QveST [7]

False is the answer

3 0

3 years ago

Read 2 more answers

What is the energy for each question in Joules?

beks73 [17]

Answer:

Hello, there!

In order to solve problems like this DO PEMDAS

The Exponent:

So, equals 4

Your problem becomes

Now we have to do what is in the (

( the is a )

And

Problem becomes

So, this means that your answer would be

Good luck on your assignment and enjoy your day!

kjExplanation:

7 0

2 years ago