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taurus [48]
3 years ago
12

Need helped for this

Chemistry
1 answer:
yarga [219]3 years ago
3 0
Molar mass of PH3: 34.0 g/mol
17.0g PH3 x 1 mol PH3 / 34.0 g = 0.5 mol PH3
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Calculate the mass in grams of 8.35 × 1022 molecules of CBr4.
antiseptic1488 [7]

Answer: 45.983 g CBr₄

Explanation:

To convert from moles to grams, you know that we will need molar mass and Avogadro's number.

Avogadro's number: 6.022×10²³ molecules/mol

Molar mass: 331.627 grams/mol

Now that we have what we need, you can use these to solve for grams. 8.35*10^2^2molecules CBr_{4} *\frac{1mol}{6.022*10^2^3molecules} *\frac{331.627 g}{1 mol} =45.983 g

Our final answer is 45.983 g CBr₄.

4 0
3 years ago
What form of oxygen is not toxic to microorganism is it oh-?
Aleks04 [339]
The correct answer would be O
                                                  2
7 0
3 years ago
Write a chemical equation representing the second ionization energy for lithium. Use e− as the symbol for an electron.
zloy xaker [14]

Answer: Li^+ (g) ----> Li^2+ (g) + e^-

5 0
3 years ago
Given the following equation: 2 KCIO, +2 KCl + 30, how many grams of O, can be produced by letting 5.90 moles of KCIO, react ?
Finger [1]

Answer:

12.o of 02

Explanation:

8 0
3 years ago
A first order reaction has a rate constant of 0.543 at 25 c and 6.47 at 47
alukav5142 [94]

The activation energy Ea can be related to rate constant (k) at temperature (T) through the equation:

ln(k2/k1) = Ea/R[1/T1 - 1/T2]

where :

k1 is the rate constant at temperature T1

k2 is the rate constant at temperature T2

R = gas constant = 8.314 J/K-mol

Given data:

k1 = 0.543 s-1; T1 = 25 C = 25+273 = 298 K

k2 = 6.47 s-1; T = 47 C = 47+273 = 320 K

ln(6.47/0.543) = Ea/8.314 [1/298 - 1/320]

2.478 = 2.774 *10^-5 Ea

Ea = 0.8934*10^5 J = 89.3 kJ

5 0
2 years ago
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