1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergey [27]
3 years ago
11

Use trigonometric identities to solve tan(2theta)+tan(theta)=0 exactly for 0

Chemistry
1 answer:
hoa [83]3 years ago
4 0
Tan2(∅) ≡ 2tan(∅) / (1 - tan²∅)

Thus,
2tan(∅) / (1 - tan²(∅)) + tan(∅) = 0
2tan(∅) / (1 - tan²(∅)) = -tan(∅)
1 - tan²(∅) = -2
tan²(∅) = 3
∅ = tan⁻¹(√3)
∅ = 4nπ/3
You might be interested in
Another metal phosphate is cobalt phosphate. It will behave similar to calcium phosphate in an acid solution. What is the net io
ryzh [129]
We are given with
Cobalt phosphate - CoPO4

We are asked for the net ionic equation for the phosphate dissolving in H3O+

The net ionic equation is
CoPO4 (s) + H3O+ (aq) ----->  HPO42- (aq) + Co3+ (aq) + H2O *(l)
8 0
3 years ago
Read 2 more answers
Which of the following most accurately represents John Dalton’s model of the atom? A. a tiny, solid sphere with an unpredictable
valkas [14]

The most accurately represented John Dalton's model of the atom is: C. a tiny, solid sphere with a predictable mass for a given element

<h3>Further explanation</h3>

The development of atomic theory starts from the first term conveyed by Greek scientists who suggested that every substance has the smallest particles so that the word atomos appears, which means it cannot be divided. So, John Dalton, a British scientist put forward the hypothesis about atoms, among others:

  • 1. The elements are composed of atoms which are small particles which cannot be subdivided
  • 2. Atoms that make up the same element have the same properties, mass, and size, while for different elements, the properties are also different
  • 3. Compounds are composed of two or more atoms in a fixed ratio
  • 4. In chemical reactions, atoms after and before a reaction cannot be destroyed, only separation and reassembly occur

Point 3 shows the relationship with The Law of Constant Composition of Proust so that further research on atoms is more developed

Dalton's hypothesis is described as a solid sphere like a very small shot put ball or a bowling ball based on Dalton's hobby in bowling

<h3>Learn more</h3>

Bohr's model of the atom

brainly.com/question/1625635

Rutherford performed the gold foil experiment

brainly.com/question/1859083

The part of an atom that is mostly empty space

brainly.com/question/4089014

Keywords: atom, Dalton, a solid sphere, The Law of Constant Composition

5 0
3 years ago
Read 2 more answers
Answer these questions based on 234. 04360 as the atomic mass of thorium-234. The masses for the subatomic particles are given.
nikdorinn [45]

The mass defect for the isotope thorium-234 if given mass is 234.04360 amu is 1.85864 amu.

<h3>How do we calculate atomic mass?</h3>

Atomic mass (A) of any atom will be calculated as:

A = mass of protons + mass of neutrons

In the Thorium-234:

Number of protons = 90

Number of neutrons = 144

Mass of one proton = 1.00728 amu

Mass of one neutron = 1.00866 amu

Mass of thorium-234 = 90(1.00728) + 144(1.00866)

Mass of thorium-234 = 90.6552 + 145.24704 = 235.90224 amu

Given mass of thorium-234 = 234.04360 amu

Mass defect = 235.90224 - 234.04360 = 1.85864 amu

Hence required value is 1.85864 amu.

To know more about Atomic mass (A), visit the below link:

brainly.com/question/801533

4 0
1 year ago
An experiment shows that a 250 −mL gas sample has a mass of 0.436 g at a pressure of 742 mmHg and a temperature of 27 ∘C.
icang [17]

Answer:

41.9 g/ mol hope that helps you out

Explanation:

d=p.m/ r.t

8 0
3 years ago
Which formula represents an ionic compound?
kumpel [21]
When 2 elements are combined it creates an ionic compound
7 0
3 years ago
Read 2 more answers
Other questions:
  • A student tries to make diphosphorus trioxide using the reaction below. He adds exactly 20.00 grams of Phosphorus to an excess o
    14·1 answer
  • A compound is 52.14% C, 13.13% H, and 34.73% O by mass. What is the empirical formula of the compound?
    12·2 answers
  • You get a can of soda from the vending machine and your “friend” maliciously shakes it when you’re not looking. You open the can
    6·2 answers
  • What is the electron geometry if you have 4 electron groups around the center atom? What is the electron geometry if you have 4
    14·1 answer
  • What is the gram formula mass of Ca3(PO4)2
    13·1 answer
  • Write the chemical formula of sodium thiosulphate​
    12·1 answer
  • Which term best describes the molecule shown below?
    5·2 answers
  • Many human activities are increasing the level of the greenhouse gases in the atmosphere.
    12·1 answer
  • A sample of strontium bicarbonate weighs 5.0020 mg. How many oxygen atoms are in the sample? I have the answer, but don't unders
    13·1 answer
  • Please help me. I can’t give too much points bc I don’t have too much.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!