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kati45 [8]
3 years ago
7

Which of these is an element A. Sugar B. Salad. C. Potassium D. Water

Chemistry
2 answers:
lapo4ka [179]3 years ago
6 0
(C)Potassium is an element.......
julsineya [31]3 years ago
6 0

The right option is; C. Potassium

An element is any of the simplest chemical substances that cannot be decomposed in a chemical reaction. Every element is composed of its own type of atom that has the same number of protons. The periodic table contains all the recognized elements and groups that have similar properties. Other types of elements apart from potassium include hydrogen, lithium, helium, boron, oxygen, magnesium, sulfur etc.

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aleksandrvk [35]

Answer:

glucose

Explanation:

Chemical energy is stored in the bonds that hold the molecule together. ADP can be recycled into ATP when more energy becomes available. The energy to make ATP comes from glucose. Cells convert glucose to ATP in a process called cellular respiration.

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3 years ago
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A hurricane is MOST LIKELY to occur in an area
Flura [38]

Answer:

Western Pacific, such as the Philippines, Guam, southeast Asia (including China and Taiwan) and Japan.

Explanation:

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3 years ago
Determine the pHpH of an HFHF solution of each of the following concentrations. In which cases can you not make the simplifying
PIT_PIT [208]

The question is incomplete, complete question is :

Determine the pH of an HF solution of each of the following concentrations. In which cases can you not make the simplifying assumption that x is small? (K_a for HF is 6.8\times 10^{-4}.)

[HF] = 0.280 M

Express your answer to two decimal places.

Answer:

The pH of an 0.280 M HF solution is 1.87.

Explanation:3

Initial concentration if HF = c = 0.280 M

Dissociation constant of the HF = K_a=6.8\times 10^{-4}

HF\rightleftharpoons H^++F^-

Initially

c          0            0

At equilibrium :

(c-x)      x             x

The expression of disassociation constant is given as:

K_a=\frac{[H^+][F^-]}{[HF]}

K_a=\frac{x\times x}{(c-x)}

6.8\times 10^{-4}=\frac{x^2}{(0.280 M-x)}

Solving for x, we get:

x = 0.01346 M

So, the concentration of hydrogen ion at equilibrium is :

[H^+]=x=0.01346 M

The pH of the solution is ;

pH=-\log[H^+]=-\log[0.01346 M]=1.87

The pH of an 0.280 M HF solution is 1.87.

6 0
3 years ago
A box of jello has a mass of 250 g. How many boxes must be bought to have 1 Kg of jello? *
zhuklara [117]

Answer:

Number of boxes = 4

Explanation:

Given:

Mass of one box of jello = 250 grams

Total quantity want to purchase = 1 kg = 1 × 1,000 gram = 1,000 grams

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Number of boxes in 1,000 grams = ?

Computation:

Number of boxes = Total quantity want to purchase / Mass of one box of jello

Number of boxes = 1,000 / 250

Number of boxes = 4

Therefore, 4 boxes of jello must be purchase to get 1 kg of Jello.

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Uhm cell parts and functions
sergiy2304 [10]

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hope \: its \: helpful \: to \: you \: please \: mark \: me \: a \: brainliest

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