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2 years ago

1. Which statement describes the earliest model of the atom?

Chemistry

1 answer:

zloy xaker [14]2 years ago

5 0

Answer:

A). An atom is an indivisible hard-sphere.

Explanation:

The 'Atomic Theory' of Dalton is characterized as the earliest model(came in 1803) which described the atoms as the indivisible and resistant spheres. He <u>used the example of watermelon to elaborate that the atoms of a specific element share similar characteristics</u> and the atoms of distinct elements differ in their mass as well as their size. Thus, <u>option A</u> is the correct answer.

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Write the formulas of the following compounds:

ddd [48]

Answer:

a) Chloride dioxide

$ClO_2$

b) Di nitrogen tetra oxide

$N_2O_4$

c) Potassium phosphide

$H_2K_3P^{+2}$

d) Silver -Ag

e) Aluminium nitride - AlN

f) Silicon dioxide

$SiO_2$

I) Sulfide

$S^{2-}$

5 0

2 years ago

Susan needs to simplify the expression shown below what should be her first step

Digiron [165]

Susan should follow PEMDAS,

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction,

So, the first step should be, to solve the equation in the parentheses.

I hope this helps!

5 0

2 years ago

2.20 moles Sn to grams

mihalych1998 [28]

261.162 grams. Use the equation n=M÷Mr.

3 0

2 years ago

HELP WITH THIS ASAP PLEASE!!! What is the mass in grams of 8.42 x 10^22 atoms of sulfur?

V125BC [204]

Answer:

Answer:

see explanation and punch in the numbers yourself ( will be better for your test)

Explanation:

If you are given atoms you need to divide by Avogadro's number 6.022x10^23

then you will have moles of sulfur-- once you have moles multiply by the molar mass of sulfur to go from moles to grams

mm of sulfur is 32 g/mol

5 0

2 years ago

the development and use of the ______ a common and important piece of laboratory equipment, led scientist to the discovery of se

Liula [17]

The answer is the Microscope.

6 0

2 years ago