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3 years ago

Need help asap will give brainly

Chemistry

2 answers:

zheka24 [161]3 years ago

7 0

I think the answers are A, C, A.

scZoUnD [109]3 years ago

5 0

The answers for those are A,C ,A

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Distilled water density 1.0 g/cm^3 propane density 0.494 g/cm^3 salt water density 1.025 g/cm^3 liquid gold density 17.31g/cm^3

I am Lyosha [343]

What are you asking?

6 0

4 years ago

What amount of heat is removed to lower the temperature of 80 grams of water from 75º C to 45º C? The specific heat of liquid wa

Sindrei [870]

Answer:The correct answer option A.

Explanation:

$Q= m\times c\times \Delta T$

Q= heat removed from the water

m= mass of the water = 80 grams

c = heat capacity of water= 4.18 J/g°C

$\Delta T={\text{Change in temperature}}=45^oC-75^oC=-30^oC$

$Q=80g\times 4.18J/g^oC\times(-30^oC)$

Q = -10,032 joules $\approx$ -10,000 Joules

Negative sign indicates that heat was removed from the water.

Heat removed from the water of 80 gram of water is 10,032 Joules.Hence, the correct answer option A.

8 0

3 years ago

Read 2 more answers

In this question why devide by number of moles ?

ArbitrLikvidat [17]

Because M = mol/L or mL. 15.0 x 0.350/42.0 = M

3 0

3 years ago

If the pressure on the surface of water in the liquid stato

Novosadov [1.4K]

The water will boil at C) 80°C

<h3>Further explanation</h3>

Given

Vapour pressure of water = 47 kPa

Required

Boiling point of water

Solution

We can use the Clausius-Clapeyron equation :

$\tt ln(\dfrac{P_1}{P_2})=\dfrac{-\Delta H_{vap}}{R}(\dfrac{1}{T_1}-\dfrac{1}{T_2})$

Vapour pressure of water at boiling point 100°C=101.325 kPa

ΔH vap for water at 100°C=40657 J/mol

R = 8.314 J/mol K

T₁=boiling point of water at 101.325 kPa = 100+273=373 K

Input given values :

$\tt ln\dfrac{101.325}{47}=\dfrac{-40657}{8.314}(\dfrac{1}{373}-\dfrac{1}{T_2})\\\\0.7682=4890.1852(\dfrac{1}{373}-\dfrac{1}{T_2})\\\\0.0001571=(\dfrac{1}{373}-\dfrac{1}{T_2})\\\\\dfrac{1}{T_2}=0.00283\rightarrow T_2=353~K=80^oC$

6 0

3 years ago

Classify each phrase according to whether it applies to photophosphorylation, oxidative phosphorylation, or both

chubhunter [2.5K]

Answer:

1. Both

2. Phosphorylation

3. Both

4. Phosphorylation

5. Oxidative.

6. Both

Explanation:

Phosphorylation only occurs in chloroplast and it involves larger electrical component. Both Phosphorylation and oxidative occurs in mitochondria and it involves proton gradient. They occur in plants to produce ATP. Oxidative involves in smaller electrical component.

6 0

3 years ago