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ryzh [129]
3 years ago
10

HELP ASAP PLEASE WILL GIVE 12 points

Chemistry
2 answers:
bija089 [108]3 years ago
8 0

Answer:

zinc powder + dilute nitric acid

Decrease the temperature in Exothermic reactions (Reactions that release energy, or become hot) Add a catalyst (A substance that reduces activation energy, speeding up the reaction) Increase the concentration of reactants. Increase the concentration of catalysts

Explanation:

Brainliest?

77julia77 [94]3 years ago
8 0

Explanation:

Answer:

Sana makatulong

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How many moles of chlorine gas and 120°C and 33.3 ATM would occupy a vessel of 12 L?
Mashutka [201]
<h3>Answer:</h3>

12.387 moles

<h3>Explanation:</h3>

We are given;

Temperature of chlorine, T = 120°C

But, K = °C + 273.15

Therefore, T = 393.15 K

Pressure, P = 33.3 Atm

Volume, V = 12 L

We are required to calculate the number of moles of chlorine gas,

To find the number of moles we are going to use the ideal gas equation;

PV = nRT

R is the ideal gas constant, 0.082057 L.atm/mol.K

Therefore, rearranging the formula;

n = PV÷RT

Hence;

n = (33.3 atm × 12 L) ÷ (0.082057 × 393.15 K)

  = 12.387 moles

Therefore, the number of moles of chlorine are 12.387 moles

8 0
4 years ago
What tools do scientists use to investigate the natural world
Leya [2.2K]
They use many tools depending on what they want to investigate hopefully this helped!
3 0
3 years ago
At elevated temperature, carbon tetrachloride decomposes to its elements: CCl4(g) C(s) 2Cl2(g). At 700 K, if the initial pressur
PIT_PIT [208]

Answer:

K=0.0131M

Explanation:

Hello,

In this case, the undergoing chemical reaction turns out:

CCl_4(g) \rightleftharpoons C(s)+ 2Cl_2(g)

In such a way, by means of the mass of law action for such reaction, which is given below:

Kp=\frac{p_{Cl_2}^2}{p_{CCl_4}}

And in terms of the change x due to reaction extent:

p_{CCl_4}=p_{CCl_4}^0-x\\p_{Cl_2}=2x\\p_T=p_{CCl_4}+p_{Cl_2}=1.00-x+2x\\p_T=1.00+x

x results:

x=1.35 atm -1.00atm=0.35atm

In such a way, Kp:

Kp=\frac{(2x)^2}{1.00-x} =\frac{(2*0.35atm)^2}{1.00atm-0.35atm}=0.754atm

Nonetheless, K is asked instead of Kp, thus:

K=\frac{Kp}{(RT)^{\Delta \nu _{gas}}}

Whereas:

\Delta \nu _{gas}=2-1=1

Which is the change in the moles of gaseous species chlorine and carbon tetrachloride. Hence, we finally obtain:

K=\frac{0.754atm}{(0.082\frac{atm*L}{mol*K}*700K)^{1}}\\\\K=0.0131mol/L=0.0131M

Best regards.

8 0
3 years ago
7. DNA is essential to living organisms because it O is a spiral helix can prevent disease O carries the genetic code O can brea
dsp73

Answer: DNA is essential...because it carries the genetic code.

Explanation:

Although the other statements are true about DNA, it's a spiral helix and can break apart, its main function is that it contains the genetic code for organisms.

5 0
3 years ago
Consider the model of the nitrogen atom.
liq [111]

Answer:

1s2 2s2 2p3

Explanation:

we know that the number of electrons in an atom is equal to number of protons. So the number of electrons here is 7.

Using Moller chart, the electronic configuration is writen by the electrons first enterring into 1s then into 2s after 2p. The s orbital accomodates maximum of 2 electrons.

∴ for atomic no. 7 nitrogen atom, electronic configuration is 1s2 2s2 2p3.

5 0
4 years ago
Read 2 more answers
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