A man mixed chemicals in lab he washed his hand and eat .after eating he died why did he die

What are some good problem statements

Crazy boy [7]

Answer:

What is the problem?

Who has the problem?

Where does the problem occur?

When does the problem occur?

How often does the problem occur?

What causes the problem?

What does the problem impact?

Explanation:

8 0

4 years ago

A woolly rhinocerous skeleton (Coelodonta antiquitatis) found in Poland contains 1.30% of the C-14 found in living animals. How

krok68 [10]

Answer:

The organism died 35900 years ago

Explanation:

Half life C-14 is 5730 years.
For decay of radioactive nuclides: $\frac{N}{N_{0}}=(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$
$\frac{N}{N_{0}}$ is the fraction of radioactive nuclide remain present after t time and $t_{\frac{1}{2}}$ is the half-life of radioactive nuclide
Here $\frac{N}{N_{0}}$ is 0.013 and $t_{\frac{1}{2}}$ is 5730 yeras

Plug-in all the values in the above equation:

$0.013=(\frac{1}{2})^{\frac{t}{5730years}}$

So, t = 35900 years

Hence the organism died 35900 years ago

4 0

3 years ago

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese(IV) oxide.4HCl(aq)+MnO2(s)⟶Mn

mario62 [17]

Answer:

HCl is limiting reactant

Theoretical yield: 23.8g Cl₂

Actual yield: 17.6g C₂

Explanation:

Based on the reaction:

4HCl(aq)+MnO2(s)⟶MnCl2(aq)+2H2O(l)+Cl2(g)

4 moles of HCl reacts per mole of MnO₂ to produce 1 mole of MnCl₂ and Cl₂ and 2 moles of water.

To find the limiting reactant you must know the moles of each reactant and knowing that 4 moles of HCl reacts per mole of MnO₂ you can sikve this problem, thus:

Moles HCl (Molar mass: 36.46g/mol): 48.9g ₓ (1mol / 36.46g/mol) =

1.341 moles HCl

Moles MnO₂ (Molar mass: 86.937g/mol): 36.9g ₓ (1mol / 86.937g) =

0.424 moles MnO₂

For a complete reaction of 0.424 moles of MnO₂ you require:

0.424moles MnO₂ ₓ (4 moles HCl / 1 mole MnO₂) = 1.696 moles of HCl.

As you have just 1.341 moles of HCl. HCl is limiting reactant.

Theoretical yield means, in the reaction, that 4 moles of HCl will produce 1 mole of Cl₂. As moles of HCl are 1.341:

1.341 moles HCl ₓ (1 mole Cl₂ / 4 moles HCl) = 0.33525 moles Cl₂

In grams (Molar mass Cl₂: 70.9g/mol):

Theoretical yield: 0.33525 moles Cl₂ ₓ (70.9g / mol) = 23.8g Cl₂

As yield of reaction is 74.7%, the real mass of Cl₂ you obtain (Actual yield) is:

23.8g Cl₂ ₓ 74% = 17.6g C₂

6 0

3 years ago

What is the mass of 3.01 x 10^21 atoms of Co

OlgaM077 [116]

Answer:

0.295 g Co

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

3.01 × 10²¹ atoms Co

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Co - 58.93 g/mol

Step 3: Convert

$3.01 \cdot 10^{21} \ atoms \ Co(\frac{1 \ mol \ Co}{6.022 \cdot 10^{23} \ atoms \ Co} )(\frac{58.93 \ g \ Co}{1 \ mol \ Co} )$ = 0.294552 g Co

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.294552 g Co ≈ 0.295 g Co

5 0

3 years ago

What is the charge for the polyatomic ions listed? ammonium and acetate

Svetlanka [38]

Answer:

-1

Explanation:

Many of the common polyatomicions have an electrical charge of.

8 0

3 years ago

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