CHEMISTRY COLLEGE

What will the pressure of the gas be if the temperature rises to 87°C?A. 60 kPa
B. 161 kPa
C. 16 kPa
D. 41 kPa

Answers

Answer 1
Answer:

Answer:

A. 60 kPa

Explanation:

P2 = p1 times t2 / t1

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Why does the mixture of Fe and S have different reactions than the compound FeS?
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HELPP GIVING AWAY 30 POINTS!!!!!Determine Your family wants to use
renewable energy to heat your home. Which
renewable energy resource is best suited to
your area? Explain your answer.

Answers

Answer:

wood

Explanation:

i can take the seds from the trees to row new trees and still use the wood without causing deforestation

How many moles of MgS2O3 are in 223 g of the compound

Answers

Answer: 1.63 moles

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023* 10^(23) of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}=

Given mass = 223 g

Molar mass = 136.4

\text{Number of moles}=(223g)/(136.4g/mol)=1.63moles

Thus there are 1.63 moles in 223 g of the compound.
Moles of MgS2O3 = 223/molar mass of MgS2O3
    
                              =   223/136.42 
                              =     1.634 moles.

Hope this helps!

What is the pH of a solution with hydroxide ion concentration of 0.005

Answers

Answer:

pH = 11.7

Explanation:

pOH= -log [OH]=-log[0.05]

=2.3

pOH+pH= 14

pH= 14-2.3= 11.7

How do you fight off ADHD medication

Answers

Answer:A medication break can ease side effects. A lack of appetite, weight loss, sleep troubles, headaches, and stomach pain are common side effects of ADHD medication.

Explanation: It may boost your child’s growth. Some ADHD medications can slow a child’s growth in height, especially during the first 2 years of taking it. While height delays are temporary and kids typically catch up later, going off medication may lead to fewer growth delays.

It won’t hurt your child. Taking a child off ADHD medication may cause their ADHD symptoms to reappear. But it won’t make them sick or cause other side effects.

Calculate the mass of the air contained in a room that measures 2.50 m × 5.50 m × 3.00 m (density of air = 1.29 g/dm3 at 25°C).

Answers

The mass of air in room as per given density is 53.2 kg.

To calculate the mass of air contained in a room, we can use the formula:

mass = density x volume

Here, the given density of air is 1.29 g/dm³ at 25°C. We can convert the dimensions of the room to decimeters (dm) by multiplying by 10:

Length = 2.50 m × 10 = 25 dm

Width = 5.50 m × 10 = 55 dm

Height = 3.00 m × 10 = 30 dm

Now, we can calculate the volume of the room by multiplying the three dimensions:

Volume = length x width x height

Volume = 25 dm x 55 dm x 30 dm

Volume = 41,250 dm³

Finally, we can use the formula to calculate the mass of air:

mass = density x volume

mass = 1.29 g/dm³ x 41,250 dm³

mass = 53,212.5 g or 53.2 kg

Therefore, the mass of air contained in the room is approximately 53.2 kg.

Learn more about density,here:

brainly.com/question/29775886

#SPJ3

Explanation:

please mark me as brainlest

7. A change of state is a(n)_process.
a. Irreversible
b. Reversible

Answers

Answer: b

A change of state is a reversible process.

B that’s the answer

Good luck
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