All categories

3 years ago

COPERNICUS WHO WAS IT

1 answer:

mote1985 [20]3 years ago

4 0

Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. This is called the heliocentric, or Sun-centered, system.

You might be interested in

Fluorine has an atomic number of 9, how many electron shells does it have?

aleksandr82 [10.1K]

2 shells because if you do the electronic configuration:
2,7 which adds up to 9
7 stands for the group it in and it also stands for how many electrons are in the outer shell.
the amount of spaces stands for which period its in therefore it in period 2

4 0

3 years ago

6CO2 + 6 H2O —> C6H12O6 + 6O2

PilotLPTM [1.2K]

Answer:

The answer to your question is 0.5 moles

Explanation:

Data

moles of Glucose = ?

moles of carbon dioxide = 3

Balanced chemical reaction

6CO₂ + 6H₂O ⇒ C₆H₁₂O₆ + 6O₂

Process

To solve this problem, use proportions, and cross multiplication.

Use the coefficients of the balanced equation.

6 moles of CO₂ ----------------- 1 mol of C₆H₁₂O₆

3 moles of CO₂ ---------------- x

x = (3 x 1) / 6

-Simplification

x = 3/6

-Result

x = 0.5 moles of Glucose

3 0

3 years ago

Tell how you could distinguish between the pair of compounds by their infrared spectra: compound a ch3ch2ch2n(ch3)2 and compound

maksim [4K]

Answer:-

b. compound b will show an nh absorption while compound a will not.

Explanation:-

For compound B CH3CH2CH2NH2 there are two N-H bonds present. So it will show NH absorption.

But in compound A CH3CH2CH2N(CH3)2 there are no N-H bonds. So it will not show NH absorption.

6 0

3 years ago

What mass of metallic silver can form from 1.147 g of copper metal according to equation b?

Arisa [49]

Answer:

$\large\boxed{\large\boxed{3.894g}}$

Explanation:

From similar question, equation (b) is

Molecular Equation:

Cu(s) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + 2Ag(s)

Net Ionic Equation:

Cu(s) + 2Ag⁺(aq) → Cu²⁺(aq) + 2Ag(s)

1. Mole ratio:

$\dfrac{2molAg(s)}{1molCu(s)}$

2. Convert 1.147 g of Cu(s) to moles:

Atomic mass of Cu: 63.546g/mol

Number of moles = mass in grams / atomic mass

Number of moles = 1.147 g / 63.546 g/mol = 0.01805 mol Cu(s)

3. Calculate the moles of Ag(s):

$0.01805molCu(s)\times \dfrac{2molAg(s)}{1molCu(s)}=0.03610molAg(s)$

4. Convert 0.03610 mol Ag(s) to grams:

Atomic mass of Ag(s) = 107.868g/mol

Mass = 0.03610mol × 107.868g/mol = 3.894g

4 0

3 years ago

The protons account for about half the mass of most elements. Protons are located in the atomic nucleus along with the neutrons

Lady_Fox [76]

Answer:

Explanation:

The electrical charge on protons are positive charges.

Protons are subatomic particles and they carry positive charges on them. In all instances, they are found in the tiny nucleus along with neutrons.

Both protons and neutrons contributes the bulk mass of an atom whereas electrons is negligible and inconsequential to the mass of the atom.

Electrons carry negative charges within an atom with a charge of -1
Neutrons are uncharged subatomic particles.
Protons carry positive charges, +1

7 0

3 years ago