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Ksju [112]
3 years ago
8

In terms of energy, how would you classify the following chemical reaction? 2Cu + O2 + 315kJ → 2CuO

Chemistry
1 answer:
german3 years ago
4 0
It'd be an endothermic reaction because it requires an input of heat to occur
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<span>The rate at this temperature for the given concentrations would be..
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What do all four of these types of molecules have in common?
nalin [4]
D. They all contain carbon as an important part of their structure.
3 0
3 years ago
Basic substances have a gritty texture.
crimeas [40]
<h3>1.<u> Answer;</u></h3>

False

<h3><u>Explanation;</u></h3>

Bases have some of the following properties;

  • They have a bitter taste
  • They have a slimy, or soapy feel on fingers
  • Most bases react with acids and precipitate salts.
  • Strong bases may react violently with acids.
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<h3>2. <u>Answer;</u></h3>

An acid

<h3><u>Explanation;</u></h3>
  • When acids are dissolved in water, the concentration of the acid decreases and it becomes dilute.
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5 0
3 years ago
A 0.885 M solution of KBr whose initial volume is 82.5 mL has more water added until its concentration is 0.500 M. What is the n
4vir4ik [10]

Answer:

V_2=146mL

Explanation:

Hello there!

In this case, since the equation for the calculation of dilutions is:

M_1V_1=M_2V_2

Whereas M is the molarity and V the volume, because the final concentration is lower than the initial. Thus, since we are asked to calculate the final volume, we solve for V2 as follows:

V_2=\frac{M_1V_1}{M_2}=\frac{0.885M*82.5mL}{0.500M}\\\\V_2=146mL

Best regards!

4 0
3 years ago
A. 6.07 x 10-15<br> How many significant figures are there in this equation
Harman [31]

Answer:

3

Explanation:

In scientific notation, the number of integers in the first part will always be the amount of significant figures.

For example,

1) 1.542505 x 10^17 =7 significant figures

1) 1.54 x 10^17 =3 significant figures

8 0
3 years ago
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