All categories

3 years ago

Give 5 reasons why riding a bicycle is more healthier than riding a car please and thank you.

1 answer:

8 0

1. Maintains muscles strong and healthy

2. Allows blood to move smoothly

3. Can remove stress (makes you feel better)

4. It prevents pollution in the air

5. Helps you lose weight

You might be interested in

rutherford proposed that atoms have positive nuclei. which statement correctly describes the nucleus of an atom? the nucleus con

artcher [175]

The statement that correctly describes the nucleus of the atom is that most of the mass of an atom is located in the nucleus. The nucleus contains neutrons and protons. Rutherford reasoned that all of the atom's positively charged particles were contained in the nucleus and the negatively charged particles were scattered outside the nucleus. Both neutrons and protons are given a mass of one atomic mass unit or amu. Electrons have a mass many times smaller than 1 amu.

4 0

4 years ago

Read 2 more answers

If 2.35 L hydrogen gas react with nitrogen gas to form nitrogen trihydride, how many grams of nitrogen will be needed for the re

love history [14]

Answer:

1.47 g

Explanation:

6 0

3 years ago

The equilibrium constant, Kp, for the following reaction is 9.52Ã10-2 at 350 K: CH4(g) + CCl4(g) 2CH2Cl2(g). Calculate the equil

Nimfa-mama [501]

Answer:

A) p CH₄ = 0.732 atm

B) p CCl₄ = 0.732 atm

c) p CH₂Cl₂ = 0.22 atm

Explanation:

we have the equilibrium constant for this problem, along the initial pressures for the reactants, and need to find the partial pressures at equilibrium. So lets setup the equilibrium:

CH₄ (g) + CCl₄ (g) ⇔ 2 CH₂Cl₂ (g) Kp = 9.50 x 10⁻²

where Kp is given by :

Kp = p CH₂Cl₂ ² / p CH₄ x p CCl₄

where p are the partial pressures

p CH₄ atm p CCl₄ atm p CH₂Cl₂ atm

initial 0.844 0.844 0

change - x - x +2x

equilibrium 0.844 - x 0.844 - x 2 x

Kp = 9.52 x 10⁻² = ( 2x )²/ (( 0.844 - x ) x ( 0.844 - x ))

9.52 x 10⁻² = (2x)² / ( 0.844 - x )²

Taking square root to both sides of the equation:

√9.52 x 10⁻² = 2x / (0.844 - x )

0.309 = 2x / (0.844 - x)

0.260 - 0.309 x = 2x

0.260 = 2.309 x ⇒ x = 0.112

So the partial pressures are at equilibrium are:

p CH₄ = p CCl₄ = 0.844 - 0.112 = 0.732 atm

p CH₂Cl₂ = 2 x (0.112 atm) = 0.224 atm

You can check your answer is correct by plugging this values and comparing with the given Kp.

6 0

3 years ago

Read 2 more answers

Which statement supports one of Dalton's contributions to the atomic theory? ...................................................

Svetlanka [38]

B. The element nitrogen is made up only of nitrogen atoms.

Explanation:

Dalton stipulated , in his theory, that all the atoms of pure elements were identical. However different elements had different kinds of atoms that differ in their size and mass. The other stipulations of Dalton's theory were that atoms are the smallest unit of mass and were indivisible – this was later rebutted by advanced atomic theories .

Another major contribution by Dalton's theory is that chemical reactions involved the rearrangement of atoms observing the law of conservation of mass,

5 0

3 years ago

What would be the mass of gas inside a 3.0-L balloon at 0 degrees Celsius and 1.0 atm filled with carbon dioxide gas? *

Anni [7]

Answer:

5.7 grams is the mass carbon dioxide gas inside a 3.0-L balloon.

Explanation:

Using ideal gas equation:

PV = nRT

where,

P = Pressure of carbon dioxide gas = $1.0 atm$

V = Volume of carbon dioxide gas = 3.0 L

n = number of moles of carbon dioxide gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of carbon dioxide gas =0°C = 0+273= 273 K

Putting values in above equation, we get:

$(1.0 atm)\times 3.0 L=n\times (0.0821L.atm/mol.K)\times 273 K\\\\n=0.13 mol$

Mass of 0.13 mole carbon dioxide gas :

= 0.13 mol × 44 g/mol = 5.7 g

5.7 grams is the mass carbon dioxide gas inside a 3.0-L balloon.

3 0

3 years ago