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MaRussiya [10]
3 years ago
9

Which property of manganese dioxide helps it turn hydrogen peroxide into water faster than it would without it?

Chemistry
2 answers:
yKpoI14uk [10]3 years ago
6 0
I’m going to say B.
Katen [24]3 years ago
3 0

Answer:

B is the correct answer.

......Hopefully it it helpful.......

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How does a metric prefix modify a unit?
Daniel [21]

Answer:Locate the row corresponding to known unit of torque along the left of the table. Multiply by the factor under the column for the desired units. For example, to convert 2 oz-in torque to n-m, locate oz-in row at table left. Locate 7.062 x 10-3 at intersection of desired n-m units column. Multiply 2 oz-in x (7.062 x 10-3 ) = 14.12 x 10-3 n-m.

Converting between units is easy if you have a set of equivalencies to work with. Suppose we wanted to convert an energy quantity of 2500 calories into watt-hours. What we would need to do is find a set of equivalent figures for those units. In our reference here, we see that 251.996 calories is physically equal to 0.293071 watt hour. To convert from calories into watt-hours, we must form a “unity fraction” with these physically equal figures (a fraction composed of different figures and different units, the numerator and denominator being physically equal to one another), placing the desired unit in the numerator and the initial unit in the denominator, and then multiply our initial value of calories by that fraction.

Explanation:

Since both terms of the “unity fraction” are physically equal to one another, the fraction as a whole has a physical value of 1, and so does not change the true value of any figure when multiplied by it. When units are canceled, however, there will be a change in units. For example, 2500 calories multiplied by the unity fraction of (0.293071 w-hr / 251.996 cal) = 2.9075 watt-hours.

7 0
3 years ago
What is the mass of one mole of hydrogen molecules?
Lilit [14]

Answer:

2 grams

Explanation:

One MOLE of hydrogen atoms contains the same number of atoms as the number of hydrogen molecules in one MOLE of hydrogen molecules, i.e., Avagadros number. However, one mole of hydrogen atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams.

4 0
3 years ago
Read 2 more answers
Why does an aerial require two explosions of black powder
GuDViN [60]

Answer:

to launch aerials and also causes the explosions necessary for special effects like noise or colored light.

Explanation:

5 0
2 years ago
Could I have help on 4 and 5? Just the letter please I don't need an explaintion
PIT_PIT [208]
5. is b
but im not sure about 4
 hope this helps
6 0
3 years ago
Write an algebraic expression to repro<br> 1.4 times a number, increased by 7
liberstina [14]
I think its gonna be 5
7 0
3 years ago
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