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Orlov [11]
3 years ago
12

Forces that change an object motion by touching the object are _______ forces

Chemistry
1 answer:
strojnjashka [21]3 years ago
7 0

Forces are pushes and pulls that may change the motion of an object. Balanced forces result in an object remaining at rest or moving at a constant speed. Unbalanced forces result in the acceleration of an object. An object's motion depends on how it changes position.

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What is the pH of a 0.025 M HCl solution?<br> 12.4<br> 1.6<br> 2.5<br> 05
attashe74 [19]

Answer:  pH is 1.6

Explanation: Explanation: HCl is strong acid and it protolyzes totally:

HCl + H2O  ⇒ H3O+ + Cl-

Concentrations are same:  [H3O+] = c(HCl)

pH = - log[H3O+] = - log(0.025) = 1.60

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3 years ago
If the formula for a compound is represented by X3Y2 and the charge on the Y ion is -3, what is the charge in the X ion?
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3 years ago
Which is least likely to occur after an experiment i conducted to test a hypothesis?
Alenkinab [10]

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The hypothesis becomes a theory if the results support it is answer.

Explanation:

I hope it's helpful!

8 0
3 years ago
The burning of 80.3 g of SiH4 at constant pressure gives off 3790 kJ of heat. Calculate △H for this reaction. SiH4(g) + 2O2(g) ⟶
Trava [24]

Answer  : The value of ΔH for this reaction is, -1516 kJ/mol

Explanation :

First we have to calculate the moles of SiH_4

\text{Moles of }SiH_4=\frac{\text{Mass of }SiH_4}{\text{Molar mass of }SiH_4}

\text{Moles of }SiH_4=\frac{80.3g}{32.12g/mol}

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Now we have to calculate the ΔH for this reaction.

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So, 1 mole of SiH_4 react to gives heat = -\frac{3790kJ}{2.5mol}

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Therefore, the value of ΔH for this reaction is, -1516 kJ/mol

7 0
3 years ago
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