Answers
Answer:
1chemical properties
2.chrmistry
3.precipitate
4.endothermic reaction
5.matter
6.physical property
7.chemical change
8.exothermic reaction
9.physical change
Related Questions
Choose the option below that is a characteristic of ketones. a. They contain a carbonyl group that exhibits sp hybridization around the carbon atom. b. They contain a carbonyl group with a nonpolar carbon-oxygen bond. c. The functional group of this type of compound must always be on the end of a carbon chain. d. The functional group of this type of compound must always be in the middle of a carbon chain.
how many grams of F2 are needed to react with 3.50 grams of Cl2 Equation needed for question- Cl2+3F2-->2ClF3 please explain how to get the answer.
How to prepare ethanoic acid from ethane
The following data were obtained in a kinetics study of the hypothetical reaction A + B + C → products. [A]0 (M) [B]0 (M) [C]0 (M) Initial Rate (10–3 M/s) 0.4 0.4 0.2 160 0.2 0.4 0.4 80 0.6 0.1 0.2 15 0.2 0.1 0.2 5 0.2 0.2 0.4 20 Using the initial-rate method, what is the order of the reaction with respect to C? a. zero-order b. first-order c. third-order d. second-order e. impossible to tell from the data given
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Answer:
bxnhdjxjdjvxjsj sbdhhxhchdbd
Answers
Answer:
Boron
Explanation:
Because it has a complete 2s orbital and therefore, an increased shielding of the 2s orbital will reduce the ionisation energy.
Final answer:
Among boron, carbon, aluminum, and silicon, aluminum has the lowest first ionization energy due to its position on the periodic table, which is further to the left and in a higher period than the other elements.
Explanation:
Ionization energy refers to the energy necessary to remove an electron from an atom in its gaseous state. The element with the lowest first ionization energy among boron, carbon, aluminum, and silicon is aluminum. Ionization energy increases from left to right across a period in the periodic table and from bottom to top in a group. Thus, aluminum, being to the left of boron, carbon, and silicon, has the lowest first ionization energy. Furthermore, aluminum is in the third period, which is below boron and carbon's second period.
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Calculate no of gram atoms in 7.5g of gold
Answers
therefore molar mass of gold is - 197.2 g/mol
avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units. These units could be atoms making up elements or molecules making up compounds.
1 mol of gold is made of 6.022 x 10²³ atoms of gold
since 1 mol weighs 197.2 g
therefore if 197.2 g of gold contains - 6.022 x 10²³ atoms of gold
then 7.5 g contains - 6.022 x 10²³ x 7.5/ 197.2 = 2.29 x 10²² atoms of gold
answer is 2.29 x 10²² atoms of gold
A) less kinetic energy.
B)
more kinetic energy.
more total energy.
D) the same total energy.
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Ice cream is colder and steam is warmer, something cold has the atoms moving slower which means it has less kinetic energy.
Hope this helps!
Answer:
its not more kinetic energy i put that and got it wrong
Answers
Answer:
1. micro
2. centi
3. milli
4. kilo
Explanation:
Prefixes, in mathematical exponents, are defined as the alphabetical names associated with the mathematical factors. Some examples are as follows:
10⁶ = Mega
10⁹ = Giga
10⁻⁹ = Nano
10⁻¹² = Pico
So, in order to name the metric system prefixes associated with each of the given mathematical factor, we first convert the factor into exponent form and then write its prefix, as follows:
10⁻⁶ = micro
1/100 = 0.01 = 1 x 10⁻² = centi
0.001 = 1 x 10⁻³ = milli
1000 = 1 x 10³ = kilo
A. pOH=13
B. pOH=11.77
C. pOH=8.52
D. pOH=10.52
2. what is the pOH of a solution if the pH is 2.23
A. pOH=1
B. pOH=12
C. pOH=8
D. pOH=9
3. Given a solution of perchloric acid has a concentration of .023M, what is the pH and pOH
A. pH=2.3 and pOH=11.97
B. pH=1.64 and pOH= 12.36
C. pH=4.5 and pOH=9.95
Answers
2)B
3)HClO4=H+ +clo4—
C(H+)=0.023 M
pH=-log[H+]=1.63
POH=14-1.63=12.37
Final answer:
The pH and pOH for a solution are related through the equation pH + pOH = 14. The pOH for solutions with a pH of 2.23 is 11.77, and in a solution of perchloric acid with a concentration of .023M, the pH is 1.64 and pOH is 12.36.
Explanation:
The concept of pOH and pH are related through the equation pH + pOH = 14 at 25 °C. If you have the value of one, you can easily find the other. For your first two questions, the pH of solution is given as 2.23. Therefore, the pOH would be 14 - 2.23 = 11.77. Your answer to both questions 1 and 2 is B. pOH=11.77.
For question 3, the perchloric acid has a concentration of .023M. To find the pH, we calculate -log[H3O+], which gives about 1.64. Therefore, the pOH would be 14 - 1.64 = 12.36. Your answer to question 3 is B. pH=1.64 and pOH=12.36.
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