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3 years ago

Briefly explain Potassium with 19 protons and 19 neutrons

Chemistry

1 answer:

Igoryamba3 years ago

8 0

Answer: Group

Melting point

63.5°C, 146.3°F, 336.7 K

Period

Boiling point

759°C, 1398°F, 1032 K

Block

Density (g cm−3)

0.89

Atomic number

Relative atomic mass

39.098

State at 20°C

Solid

Key isotopes

39K

Electron configuration

[Ar] 4s1

CAS number

7440-09-7

Explanation:

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Ethanol (c2h6o) is a common intoxicant and fuel produced from the fermentation of various grains. how many moles of ethanol are

Lynna [10]

n = m / M

Where, n is moles of the compound (mol), m is the mass of the compound (g) and M is the molar mass of the compound (g/mol)

Here, the given ethanol mass = 50.0 kg = 50.0 x 10³ g

Molar mass of the ethanol = (12 x 2 + 1x 6 + 1 x 16) g/mol
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2 years ago

what is the effect of using higher concentration of sodium hydrogen carbonate on the rate of reaction?

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2 years ago

The prefix ‘kilo-‘ means a thousand.

Blababa [14]

Answer:

0.97 kg, 1.0kg

Explanation:

As you have mentioned in the question, to convert kilo-gram to grams, this conversion is used, 1 kilogram = 1,000 grams

Initially, when one has to convert from one unit to another, there is a lot of confusion. To avoid any such, multiply and divide the number with units to which it has to be converted.

Here,

970 g = $970 g \times\frac{1 kg}{1 kg}$

This makes no difference to the number.

970 g = $970 g \times\frac{1 kg}{1000 g}$

As, 1 kg= 1,000 g

970 g = $\frac{970}{1000} kg$

970 g = 0.97 kg

Rounding this off to the nearest tenth of a kilogram.

The tenths place is immediately to the right of the decimal point.

Here, 9 is at the tenth's place. Round the tenth's place up if the digit at hundredth's place is greater than or equal to 5. Since, 7 > 5, up the number at tenth's place.

So, answer is 1.0 kg

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Answer:

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