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erica [24]
3 years ago
13

Express 749 000 000 in scientific notation,

Chemistry
1 answer:
Dima020 [189]3 years ago
8 0

Answer:

7.49 × 108

Explanation:

Scientific notation is a way to express numbers in a form that makes numbers that are too small or too large more convenient to write. It is commonly used in mathematics, engineering, and science, as it can help simplify arithmetic operations. In scientific notation, numbers are written as a base, b, referred to as the significant, multiplied by 10 raised to an integer exponent, n, which is referred to as the order of magnitude:

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Why does nitrogen have stronger attractive forces between its nucleus and valence electrons than phosphorus?
timofeeve [1]

Answer:

Nitrogen atom is small in size than phosphorus thus the bond between its nucleus and valence electrons are stronger than phosphorus.

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3 0
3 years ago
Use mathematics to prove that the 5.50 grams of salicylic acid (C7H6O3) used in this experiment is equal to 0.04 mol.
g100num [7]

Answer:

Please find the answer to the question below

Explanation:

In chemistry, the following mathematical formula is used to calculate the number of moles contained by a substance:

mole = mass of substance (g)/molar mass of substance (g/mol)

Molar mass of salicylic acid (C7H6O3) = 12(7) + 1(6) + 16(3)

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Approximately, the number of moles of 5.5grams of salicylic acid is 0.04moles. This is in accordance with the mole value (0.04) given in this question.

7 0
3 years ago
Looking at the Bohr models of atoms offer an explanation as to WHY the atomic size changes as it does for both periods and group
andriy [413]
Element 87 francium have the highest atomic size, so in short the closest element to francium have the high atomic size.

5 0
3 years ago
5. I have a mixture of salt, water,
dolphi86 [110]

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7 0
3 years ago
A substance has a mass of 360 g and a volume of 7.5 cm3. What is its density?
a_sh-v [17]
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answer D

hope this helps!
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