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4 years ago

What is the difference between theory and hypothesis

Chemistry

1 answer:

kogti [31]4 years ago

6 0

Answer:

A theory is something to explain to someone and a hypothesis is a question you ask your self before an experiment. I THINK

You might be interested in

A 35.0-g piece of copper wire is heated, and the temperature of the wire changes from 29.0°C to 76.0C. The amount of heat absorb

kotykmax [81]

Answer:

0.15cal/g°C

Explanation:

Given parameters:

Mass of copper piece = 35g

Initial temperature = 29°C

Final temperature = 76°C

Amount of heat absorbed = 243cal

Unknown:

Specific heat of copper = ?

Solution:

The specific heat is the amount of heat supplied to a unit mass of substance that causes a 1°C rise in temperature.

Specific heat C, = $\frac{H}{m(T_{2} - T_{1} )}$

where H is the amount of heat supplied

m is the mass of the copper

T is the temperature

Input the parameters;

C = $\frac{243}{35(76 - 29)}$ = 0.15cal/g°C

7 0

3 years ago

The density of oxygen gas is 0.00143 g/mL. How many grams are in 45900 mL?

hoa [83]

Answer:

m = 65.6 g

Explanation:

You can use the formula for density to solve.

d = m/v

You can plug in the values for density and volume. Solve for mass.

d = m/v

0.00143 g/mL = m/(45900 mL)

0.00143 g/mL× 45900 mL = m/(45900 mL) × 45900 mL

65.637 g = m

m = 65.6 g

3 0

4 years ago

2. Se combinan 40 g de SO2 y 25 g de O2 determine el porcentaje en masa del exceso con respecto a su masa inicial. P.A. (S = 32;

Marta_Voda [28]

Answer:

60%

Explanation:

En la reacción:

2SO₂ + O₂ → 2SO₃

Donde 2 moles de SO₂ reaccionan por mol de O₂.

El peso atómico del SO₂ es:

1S = 32g/molₓ1 = 32g/mol

2O = 16g/molₓ2 = 32g/mol

SO₂ = 32g/mol + 32g/mol = 64g/mol

Y el peso atómico de O₂ es:

2O = 16g/molₓ2 = 32g/mol

Las moles de SO₂ y O₂ son:

SO₂: 40g ₓ (1mol / 64g) = 0.625 moles

O₂: 25g ₓ (1mol / 32g) = 0.7813 moles

Para una completa reacción de SO₂ se necesitan:

0.625 moles SO₂ ₓ (1mol O₂ / 2 mol SO₂) = 0.3125 moles de O₂

Así, las moles en exceso de O₂ son:

0.7813 moles - 0.3125 moles = 0.4688 moles O₂

En gramos:

0.4688 moles O₂ ₓ (32g / mol) = 15g O₂ están en exeso.

El porcentaje en exceso es:

15g / 25g ₓ 100 =

8 0

4 years ago

6.An acid-base indicator is usually a weak acid with a characteristic color in the protonated and deprotonated forms. Because br

Eddi Din [679]

Answer:

At equal concentration of HBCG and BCG^-, the colour is green. This colour first appears at pH = 3.8

Explanation:

HBCG is an indicator that is prepared by dissolving the solid in ethanol.

Since

Ka=[BCG−][H3O+][HBCG]When [BCG-] = [HBCG], then Ka = [H3O+].

If pH = 3.8

Ka= [H3O+] = -antilog pH = -antilog (3.8)

Ka= 1.58 ×10^-4

5 0

3 years ago

A car has a mass of 222 kg and is traveling at 13m/s. What is the Kinetic energy of the car?

vfiekz [6]

Explanation:

1/2*(13^2)*222=18759

3 0

3 years ago