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3 years ago

Which of the following elements is most likely to form a +1 charge?ClMgNaLi

Chemistry

2 answers:

pogonyaev3 years ago

7 0

Answer:

Explanation:

because sodium has 1 electrons so it loses it to be stable and so have positive charge of 1

Sedbober [7]3 years ago

7 0

Answer:

Na and Li. (but see below).

Explanation:

Sodium and Lithium are in Group 1 of the Periodic Table .

They have 1 electron in their valence shell which is easily lost to produce Na1+ and Li1+ ions.

The Na atom is more reactive than the Li so if you are looking for 1 answer it is Na.

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State two safety precautions to be taken when performing diluting concentrated sulphuric acid with water

motikmotik

Explanation:

safety precautions to be taken when performing diluting concentrated sulphuric acid with water

Using gloves while diluting to avoid injury from hot sulfuric acid to hands.
Wearing safety glasses to protect eyes
Must wear lab coat before performing any chemistry practical
Safety boots to protect your legs.

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4 0

1 year ago

Two or more compounds that have the same molecular formula, but different arrangements of their atoms, are called_____ isomers.

dusya [7]

Structural isomers, as the structure of the molecule is different

6 0

3 years ago

How many atoms are in 25.00 g of B.

iren2701 [21]

Answer:

$\boxed {\boxed {\sf 1.393 *10^{24} \ atoms \ B}}$

Explanation:

1. Convert Grams to Moles

Use the molar mass (found on the Periodic Table) to convert from grams to moles.

Boron (B): 10.81 g/mol

Use this value as a ratio.

$\frac {10.81 \ g \ B }{1 \ mol \ B}$

Multiply by the given number of grams.

$25.00 \ g \ B *\frac {10.81 \ g \ B }{1 \ mol \ B}$

Flip the ratio so the grams of boron cancel out.

$25.00 \ g \ B *\frac {1 \ mol \ B }{10.81 \ g \ B}$

$25.00 *\frac {1 \ mol \ B }{10.81 }$

$\frac {25.00 \ mol \ B }{10.81 }=2.312673451 \ mol \ B$

2. Convert Moles to Atoms

We use Avogadro's Number, 6.02*10²³: the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, the particles are atoms of boron.

$\frac {6.02*10^{23} \ atoms \ B} {1 \ mol \ B}$

Multiply by the number of moles we calculated.

$2.312673451 \ mol \ B *\frac {6.02*10^{23} \ atoms \ B} {1 \ mol \ B}$

The moles of boron cancel.

$2.312673451 *\frac {6.02*10^{23} \ atoms \ B} {1 }$

$2.312673451 *6.02*10^{23} \ atoms \ B} =1.39269195*10^{24} \ atoms \ B$

The original value of grams has 4 significant figures, so our answer should have the same. For the number we calculated, that is the thousandth place.

$1.392\underline69195*10^{24} \ atoms \ B$

The 6 tells us to round the 2 to a 3.

$1.393 *10^{24} \ atoms \ B$

25.00 grams of boron is equal to 1.393*10²⁴ atoms.

6 0

3 years ago

Why do we learn about Laws and Motion

Tomtit [17]

So you don't jump off a cliff thinking you could fly. Laws and Motion are heavily used in jobs and help us understand more about the mechanics of how earth's gravity operates. Imagine in the future where we could manipulate gravity? That's why we learn and study this so much.

8 0

3 years ago

Gravity is the force that keeps us on the Earth. It pulls us towards the

Andrei [34K]

Answer:

Gravitational potential energy

Explanation:

Because gravity is less on the poles

6 0

3 years ago