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2 years ago

Name four products of incomplete combustion 1 2 3 4

Chemistry

2 answers:

velikii [3]2 years ago

8 0

Answer:

carbon dioxide hydrogen chloride carbon monoxide and nitrogen oxide

Jlenok [28]2 years ago

8 0

My answer would be exactly

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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$s}^{\mathbf{-2}}}$}$

5 0

3 years ago

Please help I’m marking a branliest answer ☹️☹️☹️☹️☹️☹️

Doss [256]

The answer would be C

7 0

2 years ago

Which of the following is a homogeneous mixture? a. Na(s) b. H2O(l) c. Cl2(g) d. NaCl(aq)

iVinArrow [24]

Answer:

H²0 is answer is H20 ok please

7 0

3 years ago

You wish to prepare an HC2H3O2 buffer with a pH of 4.24. If the pKa of is 4.74, what ratio of C2H3O2 /HC2H3O2 must you use?

LenaWriter [7]

To solve this problem, we can use the Henderson-Hasselbalch Equation which relates the pH to the measure of acidity pKa. The equation is given as:

pH = pKa + log ([base]/[acid]) ---> 1

Where,

[base] = concentration of C2H3O2 in molarity or moles

[acid] = concentration of HC2H3O2 in molarity or moles

For the sake of easy calculation, let us assume that:

[base] = 1

[acid] = x

Therefore using equation 1,
4.24 = 4.74 + log (1 / x)

log (1 / x) = - 0.5

1 / x = 0.6065

x = 1.65

The required ratio of C2H3O2 /HC2H3O2 is 1:1.65 or 3:5.

3 0

3 years ago

Rock that forms from sediments

SVETLANKA909090 [29]

So what is the question about
i don't understand

3 0

3 years ago

Read 2 more answers