A pathogen infects an organism. Which statement best describes the general effect of the infection on the organism?

An aluminium kettle weighs 1.05 Kg.

Kipish [7]

Answer:Explained

Explanation:

Given

mass of aluminium kettle( $m_k$ )=1.05 kg

(a)Heat capacity of the kettle=Heat capacity of Aluminium

$C_{Al}=0.9 J/gm-K$

(b)Heat is required to increase the temperature of this kettle from $23^{\circ} to 99 ^{\circ}$

$Q=m_kc_k\Delta T$

$Q=1.05\times 0.9\times 1000\times \left ( 99-23\right )$

Q=71.82 kJ

(c)If kettle contains water 1.25 L of water i.e. 1.246 kg of water then heat required to raise the temperature from 23 to 99

$Q=m_kc_k\left ( \Delta T\right )+m_wc_w\left ( \Delta T\right )$

$Q=1.05\times 0.9\times 1000\times \left ( 99-23\right )+1.246\times 4.184\times 1000\times \left ( 99-23\right )$

Q=71.82+396.20=468.028 kJ

7 0

4 years ago

If 2.45 g of iron are placed in 1,5 L of 0.25M HCl, how many grams of FeCl2 are obtained? Identify the limiting and excess react

lys-0071 [83]

Answer:

$m_{FeCl_2}=0.652gFeCl_2$

Explanation:

Hello there!

In this case, according to the given information and the chemical reaction, whereby iron and hydrochloric acid react in a 1:2 mole ratio, it is firstly necessary to calculate the moles of iron (II) chloride from each reactant in order to figure out the limiting reactant:

$n_{FeCl_2}=2.45gFe*\frac{1molFe}{55.845gFe}*\frac{1molFeCl_2}{1molFe}=0.0439molFeCl_2\\\\ n_{FeCl_2}=1.5L*0.25\frac{molHCl}{L} *\frac{1molHCl}{36.46gHCl}*\frac{1molFeCl_2}{2molHCl}=0.00514molFeCl_2$

In such a way, we infer the maximum moles of FeCl2 product are yielded by HCl, for which it is the limiting reactant. Finally, we calculate the grams of product by using its molar mass as shown below:

$m_{FeCl_2}=0.00514molFeCl_2*\frac{126.75gFeCl_2}{1molFeCl_2} \\\\m_{FeCl_2}=0.652gFeCl_2$

Regards!

7 0

3 years ago

Jill is making lemonade. She mixes together some water, ice, lemon juice, and sugar. The lemonade is classified as a(n) ________

alina1380 [7]

The answer is mixture I think

5 0

4 years ago

Read 2 more answers

Classify the statements below as Weather or Climate. HELP ME WITH THIS The wind is blowing from the south. The average temperatu

ivanzaharov [21]

Answer:

Weather:

- The wind is blowing from the south.

- There is a thunderstorm warning.

- The average high temperatures for July in Yellowknife is 32.5 degrees Celcius.

- The wind is blowing at 56 km / hr.

Climate:

- The average temperature for February in Australia is 19 degrees Celsius.

- The average rainfall for June in Kenya is 3.3cm.

- 10mm of rain fell today.

- It is usually cold in Ottawa in January. -There was a cold weather advisory on Jan 21 2020.

-Hurricanes are most likely to hit the Gulf of Mexico and the Carribean.

Explanation:

Hope it helps.

6 0

3 years ago

To make a 0.500 M solution, one could take 0.500 moles of solute and add Group of answer choices enough solvent to make 1.00 kg

Fiesta28 [93]

<u>Answer:</u> The correct option is enough solvent to make 1.00 L of solution

<u>Explanation:</u>

A solution consists of solute and solvent. A solute is defined as the component present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

$Molarity=\frac{Moles}{Volume}$ .......(1)

We are given:

Molarity of solution = 0.500 M

Moles of solute = 0.500 moles

Putting values in equation 1, we get:

$0.500mol/L=\frac{0.500mol}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{0.500mol}{0.500mol/L}=1.00L$

Hence, the correct option is enough solvent to make 1.00 L of solution

5 0

3 years ago