Answer:
1. 2090 J
2. 113,000J
3. 33,900J
4. -209.2 J
5. 2g
Explanation:
Note: specific heat capacity of water is 4.184 J/g°C.
1. The amount of heat can be calculated using the formula:
Q = m × c × ∆T
Q = 25 × 4.184 × (30 - 10)
Q = 104.6 × 20
Q = 2092 J
Q = 2090 J (nearest tens)
2. This question can be solved using the latent heat of vaporization of water. The latent heat of vaporization of a substance is the amount of heat required to convert a unit gram of a liquid into vapor without a change in temperature. The latent heat of vaporization of water per gram is:
2257 J/g
For 50grams of water, amount of heat that will be required will be: 50 × 2260
= 113,000J
3. For 15g of water, the amount of heat will be 15 × 2260 (latent heat of vaporization)
= 33,900J
4. Q = m × c × ∆T
Q = 5 × 4.184 × (40 - 50)
Q = 20.92 × (-10)
Q = -209.2 J
5. Q = m × c × ∆T
84 = m × 4.184 × (35 - 25)
84 = m × 4.184 × 10
84 = 41.84m
m = 84/41.84
m = 2.0076
m = 2g
Answer:
2.475 mol of O2 formed.
Explanation:
Given 1.65 moles of KClO3 as the target amount in the reactant, used the coefficient of the balanced chemical reaction involved to determine the number of moles of O2 molecules formed.
x mole of O2 = 1.65 mol KClO3 x [(3 mol O2)/ (2 mol KClO3)] = 2.475 mol of O2
x mole of O2 formed = 2.475 mol of O2
Your weight is a measure of ibs/pounds
Answer:
Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier). If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in the fluid (air or water) and being transported from one place to another. This transported material is called sediment.
Explanation:
we are lerning this tooo
Answer: V2= 15.0403226 Liters
Explanation:
Use V1/T1=V2/T2
Make sure you change the degrees Celsius to Kelvin. (Kelvin = degrees Celsius +273)
10.0L / 248 K = V2/ 373 K
Cross multiply V1 and T2 and divide by T1
(10.0 L)( 373K)/ 248 K = V2
V2= 15.0403226 Liters (Kelvin cancels out)
