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Aleks04 [339]
3 years ago
7

Suppose you have 1000 lb of waste copper (II) oxide sitting in the basement of your factory. Do you see a problem with sending i

t to a landfill?
Chemistry
1 answer:
Free_Kalibri [48]3 years ago
8 0

Answer:

Yes.

Explanation:

Yes, we have a problem with sending it to a landfill of copper oxide because it has harmful effect on the health of humans as well as more weight of the copper oxide. Copper oxide usually found in powder form which can easily be inhaled that causes death of the cell due to toxic effect on the mitochondria and lysosomes of the cell. It makes problem of health in carrying the copper oxide from the basement of the factory to the landfill region due to its power form so we can say that it can do problems  to human health while carrying from one place to another.

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When a chemical reaction occurs, what always stays the same between reactants and products?
BlackZzzverrR [31]
The total number of atoms remains unchanged, <em>always.</em> But the chemical properties change :)

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7 0
3 years ago
Alkaline earth metals with the most electronegativity
Delicious77 [7]

Answer:

beryllium

Explanation:

electronegavity 1.57

4 0
3 years ago
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A 0.25-mol sample of a weak acid with an unknown Pka was combined with 10.0-mL of 3.00 M KOH, and the resulting solution was dil
Masteriza [31]

Answer : The value of pK_a of the weak acid is, 4.72

Explanation :

First we have to calculate the moles of KOH.

\text{Moles of }KOH=\text{Concentration of }KOH\times \text{Volume of solution}

\text{Moles of }KOH=3.00M\times 10.0mL=30mmol=0.03mol

Now we have to calculate the value of pK_a of the weak acid.

The equilibrium chemical reaction is:

                          HA+KOH\rightleftharpoons HK+H_2O

Initial moles     0.25     0.03        0

At eqm.    (0.25-0.03)   0.03      0.03

                     = 0.22

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

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Now put all the given values in this expression, we get:

3.85=pK_a+\log (\frac{0.03}{0.22})

pK_a=4.72

Therefore, the value of pK_a of the weak acid is, 4.72

7 0
3 years ago
Based on the representation, which of the following statements about the element is true ?
Greeley [361]

We generally represent an element by its symbol. provided with the atomic number and mass number or atomic mass

Atomic number is the number of protons present in an element. It is constant for an element.

The mass number of element is the sum of number of protons and number of neutrons

The atomic mass is the total mass of all the protons and neutrons present in the element (in its nucleus).

the number of electrons is equal to number of protons in a neutral atom of element.

The mass of electrons is not included in the total atomic mass of element as it is very low.

So here

12 = it is the number of protons = atomic number of element.

The true statements are

The combined mass of protons and neutrons is 24.305



6 0
3 years ago
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Please help asap!!!!!
lozanna [386]
Reactant + reactant = product

C + O2 = CO2

carbon dioxide is what's being made is product
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