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3 years ago

12

Explain the chemistry behind how increasing the amount of carbon dioxide in the atmosphere results in our oceans becoming more a

cidic. Try to include a chemical equation in your answer.
Thank you, really appreciate it :)

1 answer:

Nadya [2.5K]3 years ago

4 0

The carbon atoms go into the ocean and make them more acidic CO2 plus water yay

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A ball is dropped from a height of 1.20 m and hits the floor. The ball compresses and then reforms to spring upwards from the fl

diamong [38]

Answer:

$\large \boxed{\text{98 m$\cdot$s}^{-2}}$

Explanation:

The formula for the velocity of the ball is

$v = \sqrt{2gh}$

1. Velocity at time of impact

$v = -\sqrt{2 \times 9.807 \times 1.20} = -\sqrt{23.54} = -\textbf{4.85 m/s}$

2. Velocity on rebound

The ball has enough upward velocity to reach a height of 0.86 m.

$v = \sqrt{2 \times 9.807 \times 0.86} = \sqrt{16.87} =\textbf{4.11 m/s}$

3. Acceleration

$a = \dfrac{\Delta v}{\Delta t} = \dfrac{4.11 - (-4.85)}{ 0.091} = \dfrac{8.96 }{0.091} =\textbf{98 m$\cdot$s}^{\mathbf{-2}}\\\\\text{The acceleration while the ball is in contact with the floor is $\large \boxed{\textbf{98 m$\cdot$s}^{\mathbf{-2}}}$}$

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4 years ago

How many minutes are in 3.4 days

likoan [24]

Answer: 4896

Explanation:

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4 years ago

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Which of the reactions are exothermic?

Nutka1998 [239]

Answer:

Reaction A, B, E and F are exothermic reactions.

Explanation:

Exothermic reactions are defined as the reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system.

The total enthalpy of the reaction $(\Delta H)$ comes out to be negative.

Endothermic reactions are defined as the reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system.

The total enthalpy of the reaction $(\Delta H)$ comes out to be positive.

So, from the given option reaction which are exothermic are with negative value $(\Delta H)$ that enthalpy of reaction and those are:

1) $2Mg(s) + O_2( g )\rightarrow 2MgO (s)$ ,ΔH = -1203 kJ/mol

2) $NH_3 (g) + HCl (g)\rightarrow NH_4Cl (s)$ ,ΔH =-176 kJ/mol

3) $C(graphite) + O_2 (g)\rightarrow CO_2 (g)$ ,ΔH = -393.5 kJ/mol

4) $CH_4 (g) + 2O2 (g)\rightarrow CO_2 (g) + 2H_2O (l)$ ,ΔH =-891 kJ/mol

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4 years ago

"The occurrence of the all-or-none ________________ results from depolarization in response to rapid entry of ____________ ions

Leno4ka [110]

Answer:

The correct answer is

B.action potential; sodium

Explanation:

Action potential

Nerve action potentials are initiated and propagated in an all or nothing fashion. The all-or nothing action potential is initiated when the membrane potential threshold value is reached

Sodium

Voltage-gated Na⁺ ions membrane channels open enabling an influx of sodium ions to rapidly enter the cell, raising the membrane potential up to +40 mV

Depolarization in the neuron is based ion exchange channels opening to allow the rapid influx of sodium ions (Na⁺) and the efflux of potassium ions (K⁺)

The neuronal responds rapidly and for short periods to the activation of an ion channel receptor by a drug or natural neurotransmitter is rapid rel

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3 years ago

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What is the functional group for this organic chemical

Andrej [43]

This is an amide on the aromatic ring.

4 0

4 years ago