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kvasek [131]
3 years ago
8

A student has an unknown organism under a microscope. The organism was found in a local pond. He observes that the sample organi

sm is a prokaryote. To what kingdom does the organism belong?
Chemistry
1 answer:
timurjin [86]3 years ago
5 0

Answer:

Eubacteria

Explanation:

The two prokaryotic kingdoms are Eubacteria and Archaea. A prokaryote is a relatively simple single-celled organism;

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A chemist prepares a solution by adding 258 mg of K2Cr2O7 (MW = 294.19 g/mol ) to a volumetric flask, and then adding water unti
Maksim231197 [3]

Answer: Molarity of the prepared solution is 1.75\times 10^{-3}mole/L

Explanation:

Molarity is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

V_s = volume of solution in ml = 500 ml

moles of solute =\frac{\text {given mass}}{\text {molar mass}}=\frac{0.258g}{294.19g/mol}=8.77\times 10^{-4}mol

Now put all the given values in the formula of molarity, we get

Molarity=\frac{8.77\times 10^{-4}moles\times 1000}{500ml}=1.75\times 10^{-3}mole/L

Thus molarity of the prepared solution is 1.75\times 10^{-3}mole/L

3 0
3 years ago
6. Para dos átomos que llamaremos x e y, justifica (en al menos dos
lesantik [10]

La primera instrucción es verdadera, la segunda es falsa porque dos elementos no pueden tener el mismo número de masa (excepto azufre y argón) Estrictamente hablando, No. Puede tener 2 (o más) elementos con el mismo 'número de masa atómica', lo que significa que el número total de nucleones (neutrones de protones) es el mismo. En el ejemplo dado en una respuesta anterior, el azufre tiene un isótopo con el número de masa atómica 36 (16p 20n) y Argón también tiene un 36 (18p 18n). La tercera declaración es verdadera, si tiene un número diferente de neutrones, entonces es un isótopo. La cuarta declaración es falso. Espero que esto te ayude.

5 0
3 years ago
For the general reaction aA + bB cC + DD, has the general rate law, rate k[A] [B].". What is the
nataly862011 [7]

Answer:

K=CHANGE IN CONCENTRATION/TIME TAKEN

Explanation:

7 0
3 years ago
Which of these statements is true about the temperature of a substance?
Svetradugi [14.3K]

Answer:

(c)

Explanation:

4 0
3 years ago
(Based on q = -sm∆T)
vekshin1

Answer:

Sn < Brass ≈ Zn <   Al  

Step-by-step explanation:

                      Sn   < Brass  ≈   Zn   <   Al

C/J·°C⁻¹g⁻¹: .0.246 <  0.418 ≈ 0.419 < 0.734

3 0
4 years ago
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