3 years ago

Which of the following is NOT an example of a physical change? *

Chemistry

1 answer:

Oksana_A [137]3 years ago

8 0

Answer:

burning paper

Explanation:

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Identify the following reaction type using the chemical equation below*

OLEGan [10]

Answer:

its C. a combustion reaction

3 0

3 years ago

notka56 [123]

Answer:

417

Explanation:

50um is

50000nm

50000:120=417

7 0

3 years ago

What is the mass, in grams, of 0.000142 mol of vitamin C?

tatiyna

Answer:

0.0250 g

Explanation:

176.12 g/mol* 0.000142 mol =0.0250 g

6 0

3 years ago

WHY IS A CREEP(creep as the science def) HARD TO DETECT ?( please need help to answer this question!!)

Elena L [17]

Answer:

Creep is the imperceptibly slow, steady, downward movement of slope-forming soil or rock. Movement is caused by shear stress sufficient to produce permanent deformation, but too small to produce shear failure. ... Continuous, where shear stress continuously exceeds the strength of the material.

Explanation:

4 0

3 years ago

What is the number of moles of kf in a 29-gram sample of the compound.

Irina18 [472]

Given

Weight of pottasium fluoride (KF) = 29 gms

To find

Number of moles of pottasium fluoride = ?

Solution

we know that molar mass of KF = 58.0967 g

Now,

$number \: of \: moles = \ \\ \frac{given \: weight \: of \: subtance}{molar \: mass}$

Number of moles = 29/58 = 0.5 moles

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6 0

2 years ago