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4 years ago

What is one type of force that slows our motion?

Chemistry

2 answers:

anyanavicka [17]4 years ago

5 0

Answer:

Friction is a force that slows down moving objects.

Explanation:

i got you

Umnica [9.8K]4 years ago

3 0

Answer:

Friction

Explanation:

friction between an object that is falling and the ground will start to slow down the object thats falling

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Which sample was an alkane

ch4aika [34]

Methane, propane, ethane, and butane are four alkanes.

3 0

3 years ago

The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic.

aleksley [76]

Answer:

Concentration of hydrogen ion, $[H^+]=5.0118*10^{-6} M$

Explanation:

pH is defined as the negative logarithm of hydrogen ion's concentration.

The lower the value of pH, the higher the acidic the solution is.

The formula for pH can be written as:

$pH=-log[H^+]$

Given,

pH of the saliva of Marco = 5.3

To calculate: Hydrogen ion concentration in the saliva

Thus, applying in the formula as:

$pH=-log[H^+]$

$5.3=-log[H^+]$

So,

$log[H^+]=-5.3$

$[H^+]=10^{(-5.3)}$

$[H^+]=5.0118*10^{-6} M$

8 0

4 years ago

Calculate the freezing point of a solution containing 15 grams of kcl and 1650.0 grams of water. the molal-freezing-point-depres

Soloha48 [4]

Answer is: freezing point is -0,226°C.
Answer is: the molal concentration of glucose in this solution is 1,478 m.
m(KCl) = 15 g.
n(KCl) = m(KCl) ÷ M(KCl).
n(KCl) = 15 g ÷ 74,55 g/mol.
n(KCl) = 0,2 mol
m(H₂O) = 1650 g ÷ 1000 g/kg = 1,65 kg.
b = n(KCl) ÷ m(H₂O).
b = 0,2 mol ÷ 1,65 kg = 0,122 m.
Kf(water) = 1,86°C/m.
ΔT = Kf(water) · b(solution).
ΔT = 1,86°C/m · 0,122 m.
ΔT = 0,226°C.

4 0

3 years ago

Read 2 more answers

Is aluminum homogeneous or heterogeneous?

inn [45]

<span> aluminum is an element. All elements are pure substances, so that means they are homogenous.
please mark as brainliest

</span>

8 0

4 years ago

Which of these substances is a compound

DedPeter [7]

Answer:

number 4. Ammonia

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3 years ago