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4 years ago

Which isotope is used to treat cancer? (1) C-14 (3) Co-60 (2) U-238 (4) Pb-206

1 answer:

8 0

I believe doctors use (3) Co-60 to treat ILWs. Uranium and Carbon are not used, and a different isotope of lead is used to be attached to monoclonal antibodies.

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Pls help match the following

VashaNatasha [74]

Answer:

citric acid = orange

I know the answer for this only..

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3 years ago

Which of these is an empirical formula?

iVinArrow [24]

Answer: C

Explanation:

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3 years ago

Which soil horizon contains a layer of partially weathered or unweathered rock?

Reil [10]

Answer:

B. R

Explanation:

A layer of partially weathered or unweathered rock is present in R soil horizon

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3 years ago

Read 2 more answers

Which scientist invented a model of the atom that most closely resembles the modern electron cloud model?

Colt1911 [192]

The scientist that invented a model that shows the electron cloud is Neil Bohr. <span />

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3 years ago

100.0 g of water was placed in a simple, constant-pressure calorimeter. The temperature of the water was recorded as 295.0 K. A

Marizza181 [45]

Answer:

$296.05\ \text{K}$

Explanation:

$m_w$ = Mass of water = 100 g

$c_w$ = Specific heat of water = $4.184\ \text{J/g K}$

$m_c$ = Mass of copper = 20 g

$c_c$ = Specific heat of copper = $0.385\ \text{J/g K}$

$\Delta T_w$ = Temperature change in water = $(T-295)$

$\Delta T_c$ = Temperature change in cooper = $(353-T)$

T = Final temperature of the system

The heat balance of the system is given by

$m_wc_w\Delta T_w=m_cc_c\Delta T_c\\\Rightarrow 100\times 4.184\times (T-295)=20\times 0.385\times (353-T)\\\Rightarrow 418400\left(T-295\right)=7700\left(353-T\right)\\\Rightarrow 418400T-123428000=2718100-7700T\\\Rightarrow T=\frac{1261461}{4261}\\\Rightarrow T=296.05\ \text{K}$

The final temperature of the water is $296.05\ \text{K}$ .

7 0

3 years ago