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3 years ago

Which of the following statements are true regarding SDSs and labels?(OSHA)

Chemistry

1 answer:

creativ13 [48]3 years ago

8 0

Answer:

particles larger than 5 microns are normally expelled. -particles smaller than 5 microns may enter into alveolar sacs. ... -chemical can penetrate skin and go into bloodstream.

Explanation:

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Why is the transition state of the reaction always so high in energy? A. Breaking bonds always requires energy, and getting to t

lbvjy [14]

The answer is B. Forming bonds requires energy and breaking bonds releases energy. The transition state is the highest point in one reaction energy profile. Before the transition state, the energy increases which means transition state absorbs energy.

4 0

3 years ago

Read 2 more answers

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this

Levart [38]

Answer:

Correct answer is (C) Silicon has the ability to form a partial double bond with a halogen through the overlap of its d-orbital with a p-orbital of the halogen

You question did not complete as the options are missing. See the options below;

A) The larger silicon atoms permit better overlap of its atomic orbitals with those of the halogens than the smaller carbons atoms do.

B) The large electronegativity difference between silicon and the halogens makes their bonds stronger than those of carbon.

C) Silicon has the ability to form a partial double bond with a halogen through the overlap of its d-orbital with a p-orbital of the halogen.

D) Silicon has a larger effective nuclear charge than carbon which allows it to bond more strongly to the more negative halogens than carbon.

E) Carbon-halogen bonds are unusually weak

Explanation:

Silicon reacts vigorously with halogens to form siliconhalides. The d subshell has 5 orbitals and halogen carries seven valence electronics with 5 in its p-orbital. When they react, they form stronger bonding than carbonhalide

5 0

3 years ago

Find the hydrogen ion concentration of a saturated solution of calcium hydroxide whose ph is 13. 1

salantis [7]

The pH of the solutions is 12.67.

<h3>What is pH of a Solution?</h3>

pH is the measurement of how acidic or basic a solution is. The range of pH values is from 0 to 14. Lower pH values mean higher acidity, while higher pH means higher basicity. If the pH value is equal to 7, then the solution is neutral.

To calculate the pH of the solution, a few approaches are possible. Here, the pOH of the solution is calculated first using the molar concentration of $OH^{-1}$ ions. Because pH + pOH = 14, the pH of the solution can then be calculated by subtracting pOH from 14.

Because 2 moles of $OH^{-1}$ ions are formed per mole of $Ca(OH)_{2}$ dissolved, the pOH of a saturated $Ca(OH)_{2}$ solution at $20^{.C}$ is,

Concentration ( $C_{OH}$ ) of $OH^{-1}$ ions,

$C_{OH}$ = 0.02335 mol $Ca(OH)_{2}$ /L X 2 mol $OH^{-1}$ /1 mol $Ca(OH)_{2}$

$C_{OH}$ = 0.0467 mol $OH^{-1}$ /L

*pOH of saturated $Ca(OH)_{2}$ solution,

pOH = -log [ $C_{OH}$ ]

pOH = -log [0.0467 mol $OH^{-1}$ /L ]

pOH = 1.33

*pH of saturated $Ca(OH)_{2}$ solution,

pH = 14 - 1.33

pH = 12.67

Hence, the pH of the solutions is 12.67.

Learn more about pH of the solutions here:

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4 0

2 years ago

State the bond angle and the molecular shape of NH3 and H2O.

FinnZ [79.3K]

Answer:

H2O forms a bent structure due to the presence of 2 lone pairs over O Atom. This makes the bond angle 104.5° NH3 forms a pyramidal structure due to presence of 1 lone pair. This makes the bond angle 107°

7 0

3 years ago

CAN U GUYS HELP ME ON THIS ONE PLEAASE IM TOO DUMB YO ANSWER THIS ONE IM NOT EVEN LYING TOO PLUS THIS ASSIGNMENT WAS DUE LAST FR

garik1379 [7]

Answer:

For CH3Br, there are a total of 14 valence electrons. Hydrogen always goes on the outside, and since Carbon is less electronegative than Bromine, we'll put the Carbon in the center and the Bromine on top. We have 14 valence electrons for the CH3Br Lewis structure. Put two between atoms to form chemical bonds.

Explanation:

4 0

3 years ago