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3 years ago

How many protons, neutrons and electrons will and atom have with an atomic number of 75 and and atomic mass of 150?

Chemistry

1 answer:

REY [17]3 years ago

6 0

Answer:

proton = 75

electron = 75

neutron = 75

Explanation:

because

proton = electron = atomic number

neutron = mass number - proton

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Give a possible explanation for the relative amounts of the isometric methyl nitrobenzoates formed in the nitration reaction. Co

vovikov84 [41]

Answer:

The electrophilic aromatic substitution reaction nitration is used to nitrate methyl benzoate and acetanilide with a nitronium ion. Crystallization was used to purify the product. The melting point was used to determine its purity and the regiochemistry of the products.

Explanation:

Methyl m-Nitrobenzoate is formed in this

reaction rather that ortho/para isomers

because of the ester group of your starting

product of methylbenzoate. The functional

group of ester is a electron withdrawing group

causing nitrobenzene (N02) to become in the

meta position. Thus N02 is a deactivating

group causing itself to be a meta director.

Basically you must look at the substituents

that are attached to your starting benzene ring

in order to figure out whether your reaction

with be ortho/para directors or meta

directors. If the substituents are electron

withdrawing groups then you will be left with

meta as your product but if your substituents

are electron donating groups then your

product will be ortho/para.

4 0

3 years ago

How many grams are there in 4.4 moles of calcium, Ca?

NISA [10]

Answer:

180 g Ca

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

4.4 mol Ca

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Step 3: Convert

$4.4 \ mol \ Ca(\frac{40.08 \ g \ Ca}{1 \ mol \ Ca} )$ = 176.352 g Ca

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

176.352 g Ca ≈ 180 g Ca

3 0

3 years ago

What is the length of the hypotenuse of the right triangle ABC in the figure?

Lostsunrise [7]

Triangle ADC is also a right triangle, with D the right angle, and AC the hypotenuse.
The triangles are similar (right triangles which share an angle (A), so...
AD/AC = AC/AB 5/6 = 6/AB AB = 6*6/5 = 36/5 = 7.2

8 0

3 years ago

Read 2 more answers

Energy from the sun travels to the earth through

julia-pushkina [17]

Answer:

D. Infrared Radiation

I hope this helps.

8 0

3 years ago

Help please!!!!

emmasim [6.3K]