If one object has a positive charge and another has a negative charge, the object will what?

PLEASE HELP!!!<br><br><br>Calculate the PH of an acid solution containing 0.10 M HNO3

Anika [276]

Answer:

The pH would be 1.

Explanation:

The pH of an acid can be found by using the formula pH = - log [H⁺]. This was a method developed to be able to measure the pH of substances.

Since the concentration of HNO₃ is 0.1 M, then it also means that the concentration of H⁺ ions is 0.1 M.

By substituting for the formula: pH of 0.1 M HNO₃ = - log [0.1]

= 1

3 0

3 years ago

When we have two sorted lists of numbers in non-descending order, and we need to merge them into one sorted list, we can simply

Dovator [93]

Answer:

Explanation:

Firstly of all we have to construct the min-heap of the k-sub list and each sub list which is a node in the constructed min-heap.

We have several steps to follows:

Step-1. When we compare the two sub lists, at the starting we can compare their first elements which is actually their minimum elements.

Step-2. The min-heap formation will cost be O(k) time.

Step-3. After the step 1 & step 2 we can run the minimum algorithm which can be extracted from the minimum element in the root list.

Step-4. Then Update the root list in the heap and after that simplify the min-heap as maintained by the new minimum element in the root list.

Step-5. If any root sub-list becomes empty in the step 4 then we can take any leaf sub-list from the root and simplify it.

Step-6. At every Extraction of the element it can take up to O(log k) time.

Hence, We can say that the extract of n element in the total whose

Running time will be O(n log k + k) which can be equal to the O(n log k+ k) (since k < n).

7 0

3 years ago

.<br> In what way is kinetic energy present in a solar oven

Afina-wow [57]

Answer:

Energy of motion is called

6 0

4 years ago

Three Stoichiometry Questions

andrezito [222]

Answer:

Explanation:

7)

Given data:

Mass of aluminium = 2.5 g

Mass of oxygen = 2.5 g

Mass of aluminium oxide = 3.5 g

Percent yield = ?

Solution:

Chemical equation:

4Al + 3O₂ → 2Al₂O₃

Number of moles of Al:

Number of moles = mass/ molar mass

Number of moles = 2.5 g/ 27 g/mol

Number of moles = 0.09 mol

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 2.5 g/ 32 g/mol

Number of moles = 0.08 mol

Now we will compare the moles of aluminium oxide with aluminium and oxygen.

Al ; Al₂O₃

4 : 2

0.09 : 2/4×0.09 = 0.045

O₂ : Al₂O₃

3 : 2

0.08 : 2/3 ×0.08 = 0.053

The number of moles of aluminium oxide produced by Al are less so it will limiting reactant.

Mass of aluminium oxide:

Mass = number of moles × molar mass

Mass = 0.045 × 101.96 g/mol

Mass = 4.6 g

Percent yield:

Percent yield = actual yield / theoretical yield ×100

Percent yield = 3.5 g / 4.6 ×100

Percent yield = 76.1%

8)

Given data:

Mass of copper produced = 3.47 g

Mass of aluminium = 1.87 g

Percent yield = ?

Solution:

Chemical equation:

2Al + 3CuSO₄ → Al₂(SO₄)₃ + 3Cu

Number of moles of Al:

Number of moles = mass/ molar mass

Number of moles = 1.87 g/ 27 g/mol

Number of moles = 0.07 mol

Now we will compare the moles of copper with aluminium.

Al ; Cu

2 : 3

0.07 : 3/2×0.09 = 0.105

Mass of copper:

Mass = number of moles × molar mass

Mass = 0.105 × 63.55 g/mol

Mass = 6.67 g

Percent yield:

Percent yield = actual yield / theoretical yield ×100

Percent yield = 3.47 g / 6.67 × 100

Percent yield = 52%

4 0

3 years ago

1

WINSTONCH [101]

Answer:

The new substance will need more energy to form its chemical bonds than the old substance will release. ... More energy will be released from the old substance than the new substance will need to form its chemical bonds.

Explanation:

This is the answer I got. Hope it's really helpful

5 0

3 years ago