2 years ago

Which of the following would be the most appropriate way to collect a sample of blood?

Chemistry

2 answers:

vladimir2022 [97]2 years ago

6 0

Answer:

it's c

Explanation:

trust me I would put it in like a needle and then do whatever to it but I think it's c

maks197457 [2]2 years ago

4 0

Answer:

Explanation:

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Which of the following shows a decrease in entropy?

shusha [124]

Precipitation hope this helped you

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3 years ago

A quantity of water is heated from 25.0°C to 36.4°C by absorbing 325 J of heat energy. If the specific heat of water is 4.18 J /

Arlecino [84]

Answer:

6,8 g

Explanation:

c = 4.18 J/(g * °C) = 4180 J / (kg * °C)

$t_{1}$ = 25 °C

$t_{2}$ = 36,4 °C

Q = 325 J

The formula is: Q = c * m * ( $t_{2} - t_{1}$ )

m = $\frac{Q}{c * (t_{2} - t_{1} )}$

Calculating:

m = 325 / 4180 * (36,4 - 25) ≈ 0,0068 kg = 6,8 g

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2 years ago

A block of chocolate is melting on a hot pan. What type of heat transfer is this? Describe the way heat is transferred between t

klio [65]

Answer:liquid= _________ than the next ________ is heat

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8 0

2 years ago

What’s the mass of 2.80 mol of ca

Ludmilka [50]

Answer:

112.22 g

Explanation:

mass = no. of moles x atomic mass

From the periodic table, we can see the atomic mass of Ca is 40.078.

Therefore,

mass = 2.80 x 40.078

= 112.22g (corrected to 2 decimal places.)

3 0

2 years ago

A car travels 10km in 10 min so what is the average

ipn [44]

Average speed in km/h:

S = D/T

T = 10/60 hrs
= 0.1667

S = 10 / 0.1667
= 59.988 km/h

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2 years ago