2 years ago

Based on their positions in the periodic table, which element would you expect to have the smallest first ionization energy?

Chemistry

1 answer:

kodGreya [7K]2 years ago

4 0

The element most to the left and the farthest down

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Which of the following is the correct scientific notation for 0.000056?

svet-max [94.6K]

Hi,

$0.000056 = 5.6 \times {10}^{ - 5}$

Hope this helps.
r3t40

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2 years ago

Pls helppp ASAP I’ll brainlest

My name is Ann [436]

Answer:

The answer is B

Explanation:

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2 years ago

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Calculate the molar mass of CH4 gas at STP when 5.46Lof the gas weighs 4g??

meriva

Answer:

About 16.42 grams

Explanation:

$PV=nRT \\\\(1)(5.46L)=n(0.0821)(273) \\\\n\approx 0.2436 \\\\4g/0.2436\approx 16.42$

Hope this helps!

6 0

2 years ago

A gold coin contains 3.47 × 10^23<br> gold atoms.<br> What is the mass of the coin in grams?

VashaNatasha [74]

Answer:

Mass = 114.26 g

Explanation:

Given data:

Number of gold atoms = 3.47×10²³ atoms

Mass in gram = ?

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.

1 mole = 6.022 × 10²³ atoms

3.47×10²³ atoms × 1 mol /6.022 × 10²³ atoms

0.58 mol

Mass of gold:

Mass = number of moles × molar mass

Mass = 0.58 mol × 197 g/mol

Mass = 114.26 g

4 0

3 years ago

Elements in group 2 are called alkaline earth metals.what is most similar about alkaline earth metals

Shtirlitz [24]

Answer:

they are divalent elements

3 0

2 years ago