3 years ago

Which of these lab safety procedures is INCORRECT?

Chemistry

1 answer:

Ksju [112]3 years ago

6 0

Answer:

Explanation:

D is not necessary to follow lab safety in Laboratory

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If the neutral atom of an element has only 4 valence electrons it must be in which group? 1. IVB 2. VA 3. VIIA 4. VIA 5. IVA 6.

lisabon 2012 [21]

Answer:option

Option 5..IVA

Explanation:

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3 years ago

Dorothy left a frozen juice pop out on the counter. When she returned, the juice pop had melted into a liquid. Which of the foll

Brums [2.3K]

Answer:

B) The molecules were closer together when the juice pop was frozen.

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2 years ago

What is the chemical reaction between an acid and a base which results in the formation of salt and water?

Tcecarenko [31]

Neutralization is the process in which anacid and base react to give salt and water

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3 years ago

List a possible set of four quantum numbers (n,l,ml,ms) in order, for the highest energy electron in gallium?

Elena-2011 [213]

Gallum: Z = 31

electron configuration: [Ar] 4s^2 3d10 4s2 4p1

Highest energy electron: 4p1

Quantum numbers:

n = 4, because it is the shell number
l = 1, it corresponds to type p orbital
ml = may be -1, or 0, or +1, depending on space orientation, they correspond to px, py, pz
ms = may be -1/2 or +1/2, this is the spin number.

7 0

2 years ago

3. How many moles of silver is 8.46x1024 atoms of<br> silver?

ioda

Answer:

<h2>14.05 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{8.46 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.053156$

We have the final answer as

<h3>14.05 moles</h3>

Hope this helps you

6 0

2 years ago