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3 years ago

A slow jogger runs a mile in 11 minutes. Calculate the speed in km/h

1 answer:

3 0

By definition,
speed = dstance/time.

Note that
1 mile = 1.609 km

Therefore,
1 mile = 1.609 mk
11 minutes = 11/60 h = 0.1833 h

speed = (1.609 km)/(0.1833 h) = 8.78 km/h

Answer: 8.8 km/h (nearest tenth)

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What is the approximate mass of a 100-N person on earth

snow_lady [41]

It would be 10kg, because 1kg = 10N

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4 years ago

What is wrong with the following structure H-H-O

Strike441 [17]

Answer:

O atom requires 2 electrons to achieve octet structure and in this structure, it is only bonded to one H atom hence only obtaining an additional valence electron. Without a octet structure, the molecule is unstable hence this structure is incorrect. The correct structure should be H-O-H.

Explanation:

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3 years ago

I need Help ASAP!!! I'M HAVING A FULL MELTDOWN plz and thank you<3

Igoryamba

Answer: Thin pancakes with milk are the English version of traditional fluffy Russian pancakes baked with yeast. In Europe, pancakes look like thin, almost transparent napkins. In France they are called "crepes" and are served with hundreds of different fillings. There are no special tricks in cooking: the thinner the dough, the thinner the pancakes are. An openwork version, in a hole, will work if part of the milk from the recipe is added to the dough a little hot. Before pouring the first pancake, you should heat the pan well. The pancake is ready when it begins to brown until crispy.

Explanation:

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7 0

3 years ago

Write electron configurations for Gallium, Ga (Z=31), and show the total valence electrons

ivann1987 [24]

<u>Answer:</u> The electronic configuration of gallium is written below and number of valence electrons is 3.

<u>Explanation:</u>

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

Number of electrons in an atom is determined by the atomic number of that atom.

Valence electrons are defined as the electrons present in the outermost shell of an atom.

We are given:

An element Gallium having atomic number as 31.

Number of electrons = 31

Electronic configuration of Gallium is: $(Z=31):1s^22s^22p^63s^23p^64s^23d^{10}4p^1$

This element has 3 electrons in its outermost shell. So, the number of valence electrons is 3

Hence, the electronic configuration of gallium is written below and number of valence electrons is 3.

3 0

4 years ago

How many liters of 0.3m h3po4 are needed to neutralize 3.5l of 3m naoh

irga5000 [103]

Answer:

$V_{acid}=11.7L$

Explanation:

Hello,

In this case, given the reaction:

$3NaOH+H_3PO_4\rightarrow Na_3PO_4+3H_2O$

We notice a 3:1 molar ratio between sodium hydroxide and phosphoric acid, therefore, at the equivalence point we have:

$n_{base}=3*n_{acid}$

That in terms of molarity is:

$M_{base}V_{base}=3*M_{acid}V_{acid}$

Se we solve for the volume of acid:

$V_{acid}=\frac{M_{base}V_{base}}{3*M_{acid}} =\frac{3M*3.5L}{3*0.3M}\\ \\V_{acid}=11.7L$

Best regards.

4 0

3 years ago

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