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4 years ago

Period # for hydrogen

2 answers:

7 0

The period number for hydrogen is 1 for it is located on the horizontally, the first line (with the other being helium).

lesya [120]4 years ago

3 0

pretty positive the answer is 1

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Need help with these two, solve only the ones you can though :D

ad-work [718]

Answer: 27 is A and 28 is C.

Explanation: I’ll explain 28 but not 27 because that’s just definitions.

In CuSO4 there is a Cu, an S, and 4 O molecules. Add them up you get 6.

7 0

3 years ago

What is the molarity of a solution containing 0.5 mol of zinc sulfate (ZnSO4) per liter?

QveST [7]

molarity = G/L/RFM

RFM = 120+32+48= 200

0.5/200 = 0.0025

7 0

4 years ago

What is the name of CH4 ?

monitta

The answer is Methane

7 0

3 years ago

Read 2 more answers

8. If 0.795 moles of ammonia gas occupies 42.5 L at 670 torr, what is the Celsius temperature?

maksim [4K]

Answer: The temperature in degree Celsius is 301.31°C

Explanation:

To calculate the temperature, we use the equation given by ideal gas, which is:

$PV=nRT$

P = pressure of the gas = 670 torr = 0.882 atm (Conversion factor: 1 atm = 760 torr)

V = volume of gas = 42.5 L

n = number of moles of gas = 0.795 mol

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = temperature of gas

Putting values in above equation, we get:

$0.882atm\times 42.5L=0.795mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times T\\\\T=574.31K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$574.31=T(^oC)+273\\T(^oC)=301.31^oC$

Hence, the temperature in degree Celsius is 301.31°C

6 0

3 years ago

Do you think personality

Tpy6a [65]

Influenced by the environment

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3 years ago