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just olya [345]
4 years ago
10

If the internal energy of a system increases but there is no change in temperature, then the system's energy is increasing.

Chemistry
2 answers:
777dan777 [17]4 years ago
4 0

Answer:

kintic

Explanation:

Rina8888 [55]4 years ago
4 0

Answer:

The system's potential energy is increasing.

Hope this helps and I hope you have a wonderful day!!! :-)

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The recommended calcium intake for teenagers is 1300mg per day. A glass of milk contains 305mg of calcium. One glass contains a
aalyn [17]

305 x 4 = 1220.

1/4 of 304 = 76.

1220 + 76 = 1296.

You'd need approximately 4 and 1/4 of glasses of milk to get the recommended calcium intake for teenagers.

8 0
3 years ago
Physical Meaning of pKa Which of the following aqueous solutions has the lowest pH: 0.1 M HCl; 0.1 M acetic acid (pKa = 4.86); 0
ser-zykov [4K]

Answer:

<em>The solution with the lowest pH is 0.1 M HCl.</em>

Explanation:

Since the three solutions have the same concentration (0,1M) it is only necessary to look at the pKa of each solution.

Also, knowing that a higher pKa means a lower Ka, because pKa = -Log (Ka). Thus, a lower Ka means a lower concentration of protons with a higher pH ( pH = -Log [H+].

The HCl doesn't have a pKa because is a strong acid that dissociates completely. Therefore, this solution produces a lower pH. Looking at the pKa of acetic acid and formic acid solutions, the second with the lowest pH is the formic acid solutions and the higher pH is for the acetic acid solution.

3 0
3 years ago
Chrysanthenone is an unsaturated ketone. If Chrysanthenone has M+ = 150 and contains 2 double bond(s) and 2 ring(s); what is its
snow_lady [41]

Answer:

the Molecular formula will be; C10H14O

Explanation:

Given the data in the question;

Chrysanthenone is an unsaturated ketone,

it has M+ = 150 and contains 2 double bond(s) and 2 ring(s).

molecular formula = ?

we know that ketone contain 1 oxygen and mass of oxygen is 16

so mass of the C and H remaining will be;

⇒ 150 - 16 = 134

Now we determine the number of C atoms;

⇒ 134 / 13 = 10

hydrocarbon with 10 hydrogen atom have CnH2n+2 means

⇒ ( 10 × 2 ) +2 = 22 hydrogens

But then we have 3 unsaturation meaning 6 hydrogens less and also we have ring meaning 2 more hydrogens

⇒ 22 - 6 - 2 = 14

Hence the Molecular formula will be; C10H14O

4 0
3 years ago
Apt A piece of chalk becomes shorter as it is used. Which of the following is NOT true of the shorter piece of chalk?
Tanzania [10]
A. It’s mass has changed if not that’s then it’s B.
5 0
3 years ago
In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy level
timofeeve [1]

Answer:

8 electrons

Explanation:

As per the <u>octet rule</u>, the atoms possess a tendency to bond in a manner that every atom must have at least eight(8) electrons in its outermost/valence shell. It can be done either by sharing, gaining, or losing electrons from one atom to another. According to this rule, flourine would have 8 electrons in its outer shell after two shared electrons are given to it.

4 0
3 years ago
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