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ser-zykov [4K]
3 years ago
5

HI I AM KEANU REEVES

Chemistry
2 answers:
m_a_m_a [10]3 years ago
7 0

Answer:

hey

Explanation:

Nana76 [90]3 years ago
6 0

Answer:

hi

Explanation:

UwU

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What volume will a sample of hydrogen occupy at 28.0 oc if the gas occupies a volume of 2.23 ml at a temperature of 0.0 oc? assu
m_a_m_a [10]
2.23 / 301 K = V / 273 K 
V = 2.02 dm^3 
7 0
3 years ago
What mass of Mg is present in 25.5g of MgCl​
LenKa [72]
Hence molar mass (M) of Magnesium Chloride; MgCl.= M (2Cl)+M (Mg) = 70.90+24.31=95.21 g/mol.
3 0
3 years ago
Which of the following would likely form a heterogeneous mixture? Sugar and waterSalt and waterSand and waterBaking soda and wat
kati45 [8]

Answer:

Sand and water

Explanation:

6 0
4 years ago
Read 2 more answers
a hot air balloon has a volume of 99 L at 15°C. to what temperature must be heated to raise its volume to 1200 L ,assuming the p
bezimeni [28]
Since the pressure is constant, you can use the equation V₁/T₁=V₂/T₂ and solve for T₂. (T₂=(T₁/V₁)V₂)
since this is a gas law type question, the temperatures need to be in kelvin therefore you need to convert 15°C to kelvin.  15°C+273=288K.  The volume are already in L so they don't have to be converted.  
now you just need to plug everything in:
T₂=(288K/99L)x1200L
T₂=3491K
The answer is you need if you have a 99L of gas at 288K, you have to increase the temperature to 3491K to get a volume of 1200L if the pressure remains constant.

I hope this helps.  Let me know in the comments if anything is unclear.
4 0
3 years ago
If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add
Charra [1.4K]

Answer:

Option C. 0.23 molar

Explanation:

The following data were obtained from the question given:

C1 = 0.5 M

V1 = 340mL

V2 = since 400mL was added to the original volume, therefore = 340 + 400 = 740mL

C2 =?

The concentration of the diluted solution can be calculated by using the following:

C1V1 = C2V2

0.5 x 340 = C2 x 740

Divide both side by 740

C2 = (0.5 x 340) / 740

C2 = 0.23M

Therefore, the new concentration of the solution is 0.23M

3 0
3 years ago
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