3 years ago

If 81g of water is measured out, how many moles are in the sample? *

Chemistry

1 answer:

valkas [14]3 years ago

7 0

Answer:

Explanation:

because moles = mass /mr

so 81/18(mr of H2O=2+16)

moles =4.5

hope this helps:)

You might be interested in

What is the total number of protons, neutrons, and electrons in a cadmium, Cd, atom that has a mass number of 112?

Triss [41]

Answer:

Number of Protons 48

Number of Neutrons 64

Number of Electrons 48

Explanation:

The mass number of an atom is the sum of the number of protons and neutrons in the nucleus of that atom

6 0

3 years ago

Symbol for the magnesium oxide reactants<br>

Stella [2.4K]

Answer:

MgO

Explanation:

Magnesium oxide is formed up of the ions Mg2+ and O2

8 0

3 years ago

Read 2 more answers

Which of the following substances is classified as a solution?

Ainat [17]

Answer:

Salt water

Explanation:

Please mark me brainliest and thank me.

3 0

3 years ago

Read 2 more answers

18.2L of gas at 95°C and 760 torr is placed in a 15L container at 80 degrees * C ; what is the new pressure ?

romanna [79]

Answer:

884.56 torr

Explanation:

Formula: $\frac{P_{1}V_{1} }{T_{1}} = \frac{P_{2}V_{2} }{T_{2}}$

P = Pressure

V = Volume

T = Temperature in kelvin (Celsius + 273.15)

$\frac{(760)(18.2) }{368.15} = \frac{P(15) }{353.15}$

$P = \frac{(760)(18.2)(353.15) }{(368.15)(15)}$

P = 884.56169

4 0

3 years ago

How many atoms are in 6.4 moles of vanadium

den301095 [7]

6.4 * 6.02 * 10^23 = 3.8528*10^24 atoms
Don't let the fact that it's vanadium throw you off, avagadros constant stays the same for all elements

3 0

3 years ago