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2 years ago

PLEASE HELPPP Count the number of atoms of each element in this molecule: 2H2K(OH2)2

Physics

2 answers:

yulyashka [42]2 years ago

7 0

Answer:

H = 6 atoms

K= 2 atoms

O = 2 atoms

sineoko [7]2 years ago

3 0

Answer:

H is 6 atoms K is2 atoms and O is 2 atoms

Explanation:

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Wilma can mow a lawn in 80 minutes. Rocky can mow the same lawn in 120 minutes. Construct an equation that would allow you to de

xeze [42]

Answer:

$t = 96 minutes$

Explanation:

Time to mow 1 lawn by Wilma is 80 minutes

so work done in 1 minute by Wilma is given as

$W_1 = \frac{1}{80}$

Similarly Rocky mow same lawn in 120 minute

so work done in 1 minute by Rocky is given as

$W_2 = \frac{1}{120}$

now we know that they both worked by "t" time

so total work performed by them

$W = \frac{t}{80} + \frac{t}{120}$

they both mow 2 lawns then it is given as

$2 = (\frac{1}{80} + \frac{1}{120})t$

$t = 96 minutes$

5 0

3 years ago

Light of wavelength 436.1 nm falls on two slits spaced 0.31 mm apart. What is the required distance from the slits to the screen

kakasveta [241]

Answer:

The correct answer is "4.26 m".

Explanation:

Given:

Wavelength,

$\lambda = 436.1 \ nm$

or,

$=436.1\times 10^{-9} \ m$

Distance,

$d = 0.31 \ mm$

or,

$=0.31\times 10^{-3} \ m$

Distance between the 1st and 2nd dark fringes,

$(y_2-y_1) = 6\times 10^{-3} \ m$

As we know,

⇒ $\frac{d}{L} (y_2-y_1) = \lambda$

or,

⇒ $L=\frac{d(y_2-y_1)}{\lambda}$

By substituting the values, we get

$=\frac{0.31\times 6\times 10^{-6}}{436.1\times 10^{-9}}$

$=\frac{0.31\times 6\times 10^3}{436.1}$

$=\frac{1860}{436.1}$

$=4.26 \ m$

3 0

3 years ago

A student measures the pH of a solution to be 6.8. Which should the student add if she wants to decrease the pH of the solution?

zloy xaker [14]

The neutral pH is 7. Less than 7 indicates an acid and more than 7 indicates a base (up to 14).
 NaCl - it's a salt (we can't measure the pH)
H2O - it can be an acid but also a base (the pH it is almost neutral,meaning close to 7 )
HF - it is a strong acid
 KOH - it is a strong base (pH=14)

↓

He needs to use HF (Hydrogen fluoride) to decrease the pH.

7 0

2 years ago

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7. Which of the following is NOT always true about a synthesis reaction!

Rainbow [258]

Answer:

Explanation:

the formula is a + b = ab

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3 years ago

If an airplane traveled 1800 km in 2 hours what is its average speed

Vesnalui [34]

Answer:

900km h

Explanation:

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2 years ago

PLEASE HELPPP Count the number of atoms of each element in this molecule: 2H2K(OH2)2​

PLEASE HELPPP Count the number of atoms of each element in this molecule: 2H2K(OH2)2