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Marat540 [252]
3 years ago
10

Mohs hardness strontium

Chemistry
1 answer:
Taya2010 [7]3 years ago
5 0

Answer: 5.5

Explanation: Strontium titanate is both much denser (specific gravity 4.88 for natural, 5.13 for synthetic) and much softer (Mohs hardness 5.5 for synthetic, 6–6.5 for natural) than diamond.

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A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path lengt
olya-2409 [2.1K]

Answer:

2.448 * 10^-5M

Explanation:

To calculate the concentration of the solution, we apply the Beer Lambert law equation.

That is A = £LC

Where £ represents the molar extinction coefficient.

We identify the values as follows:

A = absorbance = 0.735

L = cell length = 1.30

£ = 23100

c = concentration = ?

Rearranging the equation, c = A/£L

c = 0.735/(23,100 * 1.3)

c = 2.448 * 10^-5 M

3 0
3 years ago
NO2 is added to the reaction to speed it up. In which form would this substance be a homogeneous catalyst for this reaction?
sammy [17]

Answer: The correct answer is A

Explanation:

5 0
3 years ago
What is T2, if T1= 500 k, v1=10L, V2=8L,P1=600 torr,P2=200 torr?
Molodets [167]

Answer:

T2 = 133.333°K

Explanation:

Using Combined Gas Laws:

(600 torr)(10L)/500°K = (200 torr)(8L)/x°K

\frac{600 torr(10L)}{500K} =\frac{200 torr(8L)}{xK}

Cross multiply:

x°K (600 torr)(10L) = 500°K(200 torr)(8L)

Divide:

x°K = (500°K(200 torr)(8L))/(600 torr)(10L)

xK = \frac{500K(200 torr)(8L)}{600 torr(10L)}

x = 400/3°K or 133.333°K

8 0
3 years ago
7. From the arteries, blood flows into tiny, narrow vessels called _________________________________________.
lora16 [44]

Answer:

Arterioles

Explanation:

Arterioles

5 0
3 years ago
Read 2 more answers
Heeeeeellllppp, Iiiimmm sssooo stttuuuccckkk!​
n200080 [17]

Answer:

I think it would be D. None of the above

Explanation:

why I think this is because none of the answers really adds up to it

4 0
3 years ago
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