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Natasha2012 [34]
3 years ago
9

At STP or standard conditions, which list of elements contains a solid, a liquid, and a gas?

Chemistry
1 answer:
SIZIF [17.4K]3 years ago
4 0

Answer:

B.hafnium, mercury,helium

Explanation:

because the atomic number of hafnium is 72is a solid, mercury is a gas the atomic number is 80,

helium is a gas the atomic number is 2

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Scoring Scheme: 3-3-2-1 Part I. How many mL of 6 M NaOH stock solution should be used to prepare the 500 mL of 0.2 M NaOH? Pleas
Orlov [11]

Answer : The volume of 6M NaOH stock solution is, 16.7 mL

Explanation :

To calculate the volume of NaOH stock solution, we use the equation given by neutralization reaction:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of NaOH stock solution.

M_2\text{ and }V_2 are the molarity and volume of NaOH.

We are given:

M_1=6M\\V_1=?\\M_2=0.2M\\V_2=500mL

Putting values in above equation, we get:

6M\times V_1=0.2M\times 500mL\\\\V_1=16.7mL

Thus, the volume of 6M NaOH stock solution is, 16.7 mL

4 0
3 years ago
Options are upper left upper right bottom left bottom right for both problems please help!
polet [3.4K]

Answer:

(upper right) corner of the periodic table to the bottom left corner

6 0
3 years ago
What phenomenon in nature do scientists use to define the length of a meter? Why is this a better definition than “the length of
sergey [27]

Answer:

The natural phenomenon used to describe the length of a meter is the speed of light. The length of a meter is the length a light path travels in 1/(299792458) seconds through a vacuum.

The definition is better due to the uncertainty involved in the use of the length of a standard meter stick because the length of the meter stick could change due to atmospheric conditions from place to place

Explanation:

8 0
3 years ago
HELPPPP PLEASEEE
Igoryamba
Atomic mass is the answer!!
Explanation: An elements atomic number won’t be able to change
6 0
3 years ago
How does the volume of water change the solubility of sodium chloride in simple words?
kupik [55]

Answer:

When sodium chloride dissolves in water to make a saturated solution there is a 2.5 per cent reduction in volume. ... The solubility of salt does not change much with temperature, so there is little profit in using hot water.

3 0
3 years ago
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