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
balu736 [363]
3 years ago
9

Please answer these questions

Chemistry
2 answers:
lions [1.4K]3 years ago
7 0
I found number one
Atoms are not drawn to scale. Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom. Methane (CH4), a common greenhouse gas, has five atoms, one of carbon (C) and four of hydrogen (H, see Fig.
VMariaS [17]3 years ago
3 0

Explanation:

1) Is imposible to determine an element from a simple drawing, more information is need or a higher level of details. Also, a "red blob of atoms" sounds like the  description of a molecule (a union of two or more atoms) that may or may not be formed by only one element.

2) There are 92 natural elements, the other ones are synthetic and/or radioactive. You can identify them in the periodic table because their molecular weights are between ( ).

3) False, a molecule is a particular arrangement of atoms that can be from one or more elements. An element is a particular arrangement of atomic particles (neutrons, protons and electrons.)

You might be interested in
Quick question plz . .....Which one of the following is acidic oxide?
dedylja [7]

Answer:

B

Explanation:

its an acidic oxide, it disolves in water to form carbonic acid which is an acid

8 0
2 years ago
11.0 L of hydrogen and 5.52 L of oxygen are exploded together in a reaction tube. What volume of water vapor was formed, at STP?
Marysya12 [62]

Answer:

11.0 L

Explanation:

The equation for this reaction is given as;

2H2  +  O2  -->  2H2O

2 mol of H2 reacts with 1 mol of O2 to form 2 mol of H2O

At STP;

1 mol = 22.4 L

This means;

44.8 L of H2 reacts with 22.4 L of O2 to form 44.8 L of H2O

In this reaction, the limiting reactant is H2 as O2 is in excess.

The relationship between H2 and H2O;

44.8 L = 44.8 L

11.0 L would produce x

Solving for x;

x = 11 * 44.8 / 44.8

x = 11.0 L

4 0
2 years ago
What is the energy per mole of photons, in kJ/mol, emitted by an argon ion laser which produces a green beam with a frequency of
Serga [27]

Answer:

Energy per mole of photons = 2.31 × 10^2 KJ/mol

Explanation:

Energy, E = hf;

Where h is Planck's constant = 6.63 ×10^-34, and f is frequency of the photons.

E = 6.63 × 10^-34 × 5.8 × 10^14

E = 3.84 × 10^-22 KiloJoules

I mole of photons contains Avogadro's number of particles, 6.02 × 10^23

Therefore, the energy per mile of photon is 3.84 × 10^-22 KJ × 6.02 × 10^23

Energy per mile of photon = 2.31 × 10^2 KJ/mol

5 0
2 years ago
What is a stock solution?
Yakvenalex [24]
The answer is B a con betrayed solution...
3 0
2 years ago
The ph of a fruit juice is 2.2 . find the hydronium ion​ concentration, left bracket upper h 3 upper o superscript plus right br
patriot [66]

Answer:

[H₃O⁺] = 6.31 x 10⁻³ M.

Explanation:

  • To find the hydronium ion concentration [H₃O⁺], we can use the relation:

<em>pH = - log[H₃O⁺].</em>

<em></em>

∴ 2.2 = - log[H₃O⁺].

∴ log[H₃O⁺] = - 2.2

<em>∴  [H₃O⁺] = 6.31 x 10⁻³ M.</em>

3 0
3 years ago
Other questions:
  • *WILL GIVE BRAINLIEST IF SOMEONE ANSWERS THIS CORRECTLY ASAP!!!!*
    5·2 answers
  • All atoms of uranium have the same
    13·2 answers
  • The list below includes some of the properties of ammonia. Identify the physical properties in the list. Check all of the boxes
    12·2 answers
  • The chief advantage of the metric system over other systems of measurement is that it ____.
    12·2 answers
  • Use the unbalanced equation NH3+O2=NO+H2O to find the mole ratio between NO and H2O
    6·1 answer
  • Select the true statements about SDS‑PAGE, a method of separating proteins. Assume that SDS‑PAGE is performed under reducing
    10·1 answer
  • In a chemical reaction, the difference between the potential energy of the products of the potential energy of the reactants is
    8·1 answer
  • A 7.337 gram sample of chromium is heated in the presence of excess oxygen. A metal oxide is formed with a mass of 9.595 g. Dete
    11·1 answer
  • CH4+O2—-CO2+H2O what is the best classification for the unbalanced equations reaction and why
    12·1 answer
  • Please refer to image please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!