what materials you would set out in a four-surface amalgam procedure?

Answer:

D

Explanation:

Heat sometimes gets "lost" when work is done

Answer:

11.1

Explanation:

the only reason i can think of why it wouldn't be 11.111 is improper rounding and sig figs. so if you round with sig figs it would be 11.1

The sum of the given values 0.411, 9.9, and 0.8 is 11.111 which on approximation gives 11.11.

To round the answer appropriately, we need to consider the desired number of decimal places. In this case, we are asked to express the answer numerically using the appropriate number of decimal places.

The sum of 0.411, 9.9, and 0.8 is:

0.411 + 9.9 + 0.8 = 11.11

Rounded to the appropriate number of decimal places, the answer is 11.11.

The answer is calculated using the appropriate number of decimal places.

Therefore, The sum of 0.411, 9.9, and 0.8 is 11.11.

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Answer:

The mass number in a nucleus is the combined number of protons and neutrons, so it's protons and neutrons, and A symbolizes it. So A is the number of masses, which is equal to the number of protons, that is the number of atoms that we symbolized by Z, plus the number of neutrons.

The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. It is approximately equal to the atomic mass of the atom expressed in atomic mass units.

Answer:

Explanation:

1. There are fire and flashes at the top of an active volcano. No fire nor flashes for inactive volcano.

2. Smoke and debris come off an active volcano. No smoke nor debris from inactive volcano.

3. Magma flows from top of active volcano. No magma from inactive volcano.

4. There can be snow on top of inactive volcano. Active volcano is too hot for that.

5. There are plants and other wild lives around an inactive volcano.

Answer:

The relative atomic mass of an element is defined as the weight in grams of the number of atoms of the element contained in 12.00 g of carbon-12.

they simply don't have the same characteristics

Explanation:

An acid produces a hydroxonium ion as positive which is part of the reason why they are corrosive

Bases are less corrosive which is why they can neutralize an acid to give salt and water

Answer:

The mass of 1 mole LiOH has been 24 g. Thus, option D is correct.

The mass of a compound present in a mole of sample has been equivalent to the molar mass of the compound. The molar mass of the compound has been the sum of the constituent in a formula unit.

Explanation:

pls mark brainless i mean brainliest!

Answer: 24 g

Explanation:

The amount of sodium bromide that would be formed from the reaction will be 7.5524 grams

Looking at the equation of the reaction:

[tex]CuBr_2 + 2NaCl --- > CuCl_2 + 2NaBr[/tex]

The mole ratio of CuBr2 and NaCl is 1:2.

Mole of 16.4 grams of CuBr2 = 16.4/223.37

                                                 = 0.0734 moles

Mole of 22.7 grams of NaCl = 22.7/58.44

                                                 = 0.3884 moles

Equivalent mole of NaCl = 0.1468 moles

Thus, NaCl is in excess while CuBr2 is limiting.

Mole ratio of CuBr2 and NaBr = 1:1

Mass of 0.0734 mole NaBr = 0.0734 x 102.894

                                              = 7.5524 grams

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The limiting reactant would be the ammonium sulfide and the amount of the excess manganese (IV) fluoride would be 1.96 grams

From the equation of the reaction:

[tex]MnF_4(aq)+2(NH_4)_2S(aq)- > MnS_2(s)+4NH_4F(aq)[/tex]

The mole ratio of [tex]MnF_4[/tex] to [tex](NH_4)_2S[/tex] is 1:2

Mole of 70 g [tex]MnF_4[/tex] = 70/130.93

                                 = 0.53 moles

Mole of 70 g  [tex](NH_4)_2S[/tex] = 70/68.154

                                       = 1.03 moles

Equivalent mole of   [tex](NH_4)_2S[/tex] = 0.53 x 2

                                                = 1.06 moles

Thus,   [tex](NH_4)_2S[/tex] seems to be limiting while [tex]MnF_4[/tex] is in excess.

Excess [tex]MnF_4[/tex] = 0.53 - 1.03/2

                          = 0.015 mole

Mass of 0.015 mole [tex]MnF_4[/tex] = 0.015 x 130.93

                                             = 1.96 grams

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Answer:

A. The Incan Empire had been weakened by a long civil war.

Answer:

The correct answer is A. The Incan Empire had been weakened by a long civil war

Explanation:

I took the Test

Answer:

432m/s

Explanation:

The rms speed (u) is related to the temperature (T) and molecular weight (M) by the expression

u=

M

3RT

u=

40×10

−3

kg/mol

3×8.314J/molK×(27+273.15)K

u=432.2m/s

Hence, the rms speed is 432.2 m/s

hope this is helpful

A, Scientists will use the structure of existing animals as a model :)

Answer:

Scientists will use the structure of existing animal as a model.

Explanation:

-lukelaws

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Answer:

4

Explanation:

2+2=4

Answer:

C. 6.99 moles

Explanation:

To convert molecules to moles we simply divide the given number of molecules by Avogadro's number, 6.022 x 10²³

Given number of molecules : 4.21 x 10^24

Number of moles : 4.21 x 10^24 / 6.022 x 10²³ = 6.99 moles ( rounded )

The answer is C

Answer:

It can be produced by heating K2SO4 with carbon (coke): K2SO4 + 4 C → K2S + 4 CO. In the laboratory, pure K2S may be prepared by the reaction of potassium and sulfur in anhydrous ammonia.

Answer:

54g

Explanation:

al= 27gmol-1

al 2mol=54g

Answer: 54 g

Explanation:

Answer:which pictures?

Explanation:show the pictures first

answer: time

Explanation:

well the clouds are moving and the time is different or the seasons also make the background different

Answer:

0.5298072502356179

Explanation:

Based on the titration curve, the titration is of a strong acid strong base and pH at equivalence point is 7.

The equivalence point in an acid-base titration is the point at which equal amount of acid and base have reacted.

The equivalence point in a strong acid-strong base titration is at pH 7.

In a weak acid-strong base titration, the pH is greater than 7 at the equivalence point.

In a weak base-strong acid titration, the pH is less than 7 at the equivalence point.

From the titration curve;

Therefore, the titration curve is of a strong acid strong base.

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Answer:

3

Explanation:

That's the answer

I hope it helps

Answer: B. Ketone

Explanation: Another name for acetone is propanone, and it is the main ketone as it has the functional group in the middle, a CH3 on each side. Ketones have the C=O functional group.

Answer:

dignity

Explanation:

it is called the dignity of labour

Answer:

The Earth's rotation means that we experience an apparent force known as the Coriolis force. This deflects the direction of the wind to the right in the northern hemisphere and to the left in the southern hemisphere.

Explanation: