2 years ago

I need help in science

Chemistry

1 answer:

astraxan [27]2 years ago

7 0

The answer is D . I hope this help you :) .

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How much heat must your body transfer to 500.0g of water to heat it from 25.0°C to body temperature, 37.0°C?

shtirl [24]

Answer : The heat your body transfer must be, 25.1 kJ

Explanation :

Formula used :

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

or,

$Q=m\times c\times (T_2-T_1)$

where,

Q = heat = ?

m = mass of water = 500.0 g

c = specific heat of water = $4.18J/g^oC$

$T_1$ = initial temperature = $25.0^oC$

$T_2$ = final temperature = $37.0^oC$

Now put all the given value in the above formula, we get:

$Q=500.0g\times 4.18J/g^oC\times (37.0-25.0)K$

$Q=25080J=25.1kJ$

Therefore, the heat your body transfer must be, 25.1 kJ

3 0

2 years ago

What do the objects in motion have in common

Alona [7]

Answer:

All objects in motion do posses kinetic energy.

Explanation:

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2 years ago

Which of the following pieces of information is given in a half-reaction?

puteri [66]

Answer:

The number of electrons transferred in the reaction

Explanation:

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3 years ago

How many particles are in 7.07x10^-6 moles of a substance?

Butoxors [25]

Answer:

4.25*10^18

Explanation:

1 mole =6.023*10^23 particles

so 7.07*10^-6 mole=6.023*10^23*7.07*10^-6 particles=4.25*10^18 particles

5 0

3 years ago

How many liters of carbon dioxide gas are there in 4 moles of CO2 at STP?

Ad libitum [116K]

Answer:

89.6 L

Explanation:

In normal conditions,

For every 1 mole of carbon dioxide at STP, it occupies 22.4 L of volume.

============================================================

Solving :

⇒ 1 mole : 22.4 L

⇒ 1 × 4 : 22.4 × 4

⇒ 4 moles : 89.6 L

4 0

2 years ago