How is copper disposed of after use ?

What is the mass of 3.04×10^-4 mol of baking soda, NaHCO3?

Zigmanuir [339]

Answer:

0.025536g

Explanation:

no. of mole = mass/Mr

mass = Mr × no. of mole

= [23 + 1 + 12 + 3(16)] × 3.04×10^-4

= 0.025536g

= 0.0255g (3 significant figures)

8 0

3 years ago

Which of the following best explains how the results of Rutherford’s experiment affected Thomson’s widely-accepted atomic model?

hichkok12 [17]

Explanation:

Thomson's suggested the plum pudding model of the atom in which the atomic space is made up of electrons surround by positive charges.

Rutherford in his gold foil experiment revised the plum pudding model of the atom;

He discovered that most of the alpha particles passed through the foil while a few of them were deflected back.
To explain this observation, he suggested the atomic model of the atom.
In this model, an atom is made up of a small positively charged center where nearly all the mass is concentrated.
Surrounding the nucleus is the extranuclear part made up of electrons.

5 0

2 years ago

A student is trying to identify a clear liquid that he finds in a beaker in the classroom. He thinks the liquid might be either

kumpel [21]

Simply mulitply the volume by the density. As we shall see, this is dimensionally consistent.

Explanation:

density

ρ

=

Mass

Volume

, and thus units of

g

⋅

m

L

−

1

are reasonable.

For this problem:

17.4

⋅

m

L

×

0.798

⋅

g

⋅

m

L

−

1

≅

14

⋅

g

but A i supposed?

3 0

3 years ago

Why must living things rely on thousands of catalysts for chemical reactions necessary for life?

just olya [345]

<span>It affects only one chemical reaction</span>

8 0

3 years ago

Read 2 more answers

Describe the pattern of the lewis dot structure of the first 18 elements

posledela

Explanation: Lewis dot structures are the structures which represent the valence electrons of an atom. The dots in the structure are considered as the valence electrons.

First 18 elements of the periodic table are Hydrogen(H), Helium (He), Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), Neon(Ne), Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorous (P), Sulfur (S), Chlorine (Cl) and Argon(Ar).

The valence electrons are the electrons which are present in the outermost shell of an atom. The electronic configuration of the elements are:

Hydrogen (H) = $1s^1$ ; Valence electrons = 1