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Nata [24]
3 years ago
13

Consider the heating curve of H2O and line segments A, B, and C. Several changes are taking place at A, B, and C. All BUT ONE wo

uld be an appropriate description as e move through segments A, B and then C.
Usatestprep
Answer: C) Space between molecules decreases.
Eliminate

A) Temperature is increasing.

B) Kinetic energy is increasing.

C) Space between molecules decreases.
Eliminate

D) Molecular attraction is decreasing.
Chemistry
2 answers:
PtichkaEL [24]3 years ago
6 0

Answer:

C) Space between molecules decreases.

Explanation:

Space between molecules decreases. In fact, as we move from A to B and then C, the space between the molecules increases as does the kinetic energy. The molecules are moving faster and they are spreading farther apart as he molecular attraction decreases.

Tamiku [17]3 years ago
3 0

Explanation:

The answer is space between molecules decreases.

Hope this helps .>.

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White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cell
RUDIKE [14]

Answer:

Carbon is the basic compound for making of molecules in biological systems. IN growth medium, carbon sources are added to provide energy.

Explanation:

Without carbon, there would be no life on earth. Carbon molecules have the ability to form bonds that are stable with  a vast number of molecules. It can also form bonds with itself. The proteins, amino acids, DNA, RNA, lipids all contain carbon molecules. Hence, it serves as the basic compound for making molecules of life. In the growth culture media, Carbon is added in the form of carbohydrates like glucose or glutamine as it provides main source of energy.

3 0
3 years ago
How many atoms are in 8.28 moles of aluminum?
Lilit [14]

Answer:

49.86 × 10²³  atoms of Al

Explanation:

Given data:

Number of moles of Al = 8.28 mol

Number of atoms = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For 8.28 moles of Al:

1 mole = 6.022 × 10²³  atoms of Al

8.28 mol×6.022 × 10²³  atoms / 1mol

49.86 × 10²³  atoms of Al

4 0
3 years ago
“True or False”
Sliva [168]
True, I’m sorry if I’m wrong
3 0
2 years ago
ANSWER ASAP AND I WILL GIVE BRAINLYEST!!!!
Vlada [557]

Answer:

20m

Explanation:

mark brainliest

6 0
2 years ago
if 100. mL of 0.800 M Na2SO4 is added to 200. mL of 1.20 M NaCl, what is the concentration of Na+ ions in the final solution? As
Black_prince [1.1K]
Compounds Na₂SO₄ and NaCl are mixed together are we are asked to find the concentration of Na⁺ in the mixture 
Na₂SO₄ ---> 2 Na⁺ + SO₄³⁻

1 mol of Na₂SO₄ gives out 2 mol of Na⁺ ions 

the number of Na₂SO₄ moles added - 0.800 M/1000 * 100 ml
                                                         = 0.08 mol
therefore number of Na⁺ ions from Na₂SO₄ = 0.08 * 2 = 0.16 mol

NaCl ----> Na⁺ + Cl⁻ 
1 mol of NaCl gives 1 mol of Na⁺ ions
number of NaCl moles added = 1.20 M/1000 * 200 ml
                                               = 0.24 mol
number of Na⁺ ions from NaCl = 0.24 mol

total number of Na⁺ ions in the mixture = 0.16 mol + 0.24 mol = 0.4 mol
as stated the volumes are additive, 
therefore total volume  = 100 ml + 200 ml = 300 ml 
the concentration of Na⁺ ions = number of moles / volume 
                                              = 0.4 mol/ 0.3 dm³
concentration of Na⁺ = 1.33 mol/dm³
5 0
3 years ago
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