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MA_775_DIABLO [31]
3 years ago
6

Choose the correct answer to complete the paragraph about the acceptance of the heliocentric model. In the second century BCE, t

he Greek astronomer Ptolemy tried to explain the backward movement of the planets by using a solar system model that included . For centuries, this was the accepted model. During the Renaissance, Nicholas discovered the old heliocentric model of Aristarchus. In Aristarchus’s model, the rising and setting of the Sun was explained by the movement of the .
Chemistry
2 answers:
scoundrel [369]3 years ago
8 0

Answer:

the first blank is epicycle.

the second blank is Copernicus

the third blank is earth

PtichkaEL [24]3 years ago
4 0

Answer:epicycles,copermicus, earth

Explanation:

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1. Mixing is a physical change.<br> True or false
Hitman42 [59]

Answer:

true

Explanation:

if u mix it can explode which is a chemical reaction

5 0
3 years ago
Read 2 more answers
A thief who has stolen large quantities of uranium-235 may have increased
Gala2k [10]
Nuclear waste not a b or d it’s nuclear waste
3 0
3 years ago
The empirical formula of an organic compound is C2H4O. The molecular mass of the compound is 176g/mol.
Brrunno [24]

Answer:

The molecular formula of the compound is C_{8}H_{16}O_{4}. The molecular formula is obtained by the following expression shown below

\textrm{Molecular formula }= n\times \textrm{Empirical formula}

Explanation:

Given molecular mass of the compound is 176 g/mol

Given empirical formula is  C_{2}H_{4}O

Atomic mass of carbon, hydrogen and oxygen are 12 u , 1 u and 16 u respectively.

Empirical formula mass of the compound = \left ( 2\times12+4+16 \right ) \textrm{ u} = 44 \textrm{ g/mol}

n = \displaystyle \frac{\textrm{Molecular formula mass}}{\textrm{Empirical formula mass}} \\n = \displaystyle \frac{176}{44} = 4

\textrm{Molecular formula }= n\times \textrm{Empirical formula}

Molecular formula = 4 \times C_{2}H_{4}O

Molecular formula is C_{8}H_{16}O_{4}

6 0
3 years ago
Balance the following equation____H2 + ____O2 → ____H2O
Snezhnost [94]

Answer:

2

Explanation:

Since it has to be 2H2+02→2H20 for it to be balanced.

3 0
2 years ago
The equilibrium constant for the reaction 2NO2(g) N2O4(g) is Keq = . If a sample at equilibrium was found to contain 0.058 M NO2
Sladkaya [172]

Answer:

\boxed{3.6}

Explanation:

                  2NO₂ ⇌ N₂O₄

E/mol·L⁻¹:   0.058     0.012

K_{\text{eq}} = \dfrac{\text{[N$_{2}$O$_{4}$]}}{\text{[NO$_{2}$]$^{2}$}} = \dfrac{0.012}{0.058^{2}} = \mathbf{3.6} \\\\

\text{The $K_{\text{eq}}$ value would be $\boxed{\mathbf{3.6}}$}

7 0
3 years ago
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