All categories

2 years ago

Hich formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)? (5 points)

Chemistry

2 answers:

Alexxandr [17]2 years ago

6 0

Answer:

Answers are 34.6 grams and objective d.

mina [271]2 years ago

4 0

Answer:

which formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)?

» d.2 x molar mass of H + 2 x molar mass of O

Explanation:

Since we've two hydrogen atoms and two oxygen atoms, we multiply each mass by 2

$= (2 \times hydrogen) + (2 \times oxygen) \\ = (2 \times 1) + (2 \times 16) \\ = 2 + 32 \\ = 34 \: g$

Which of the following statements best defines the actual yield of a reaction?

» d.The ratio of measured yield over stoichiometric yield

You might be interested in

Jessica wants to go for a run at the park. She usually runs about 8 kilometers per hour (km/h). She has about 1.5 hours to go fo

vlada-n [284]

Answer:

Explanation:

7 0

3 years ago

The nucleus of some isotopes will spontaneously undergo nuclear decay. These isotopes are said to be radioactive. What causes th

dusya [7]

E. an unstable ratio of protons and neutrons

7 0

3 years ago

Read 2 more answers

How many grams are in 1.50 moles of nacl

alukav5142 [94]

Answer:

58.44277 grams

Explanation:

8 0

3 years ago

Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has converted 75% of the carbon-1

liraira [26]

Answer: 1145.8 years

Explanation:

Half-life of carbon-14 = 5720 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5720\text{years}}$

$k=1.21\times 10^{-4}\text{years}^{-1}$

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{years}^{-1}$

t = age of sample = ?

a = let initial amount of the reactant = 100 g

x = amount decayed = 75 g

a - x = amount left after decay process = 100 - 75 = 25g

Now put all the given values in above equation, we get

$t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}$

$t=1145.8years$

8 0

3 years ago

Read 2 more answers

Where are fusion reactions found

Paha777 [63]

Answer:

In a nuclear fusion reaction, the nuclei of two atoms combine to create a new atom. Most commonly, in the core of a star, two hydrogen atoms fuse to become a helium atom. Although nuclear fusion reactions require a lot of energy to get started, once they are going they produce enormous amounts of energy.

Explanation:

4 0

3 years ago

Read 2 more answers