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2 years ago

Control of microbial growth in an operating room may involve which of the following?

Chemistry

1 answer:

Sav [38]2 years ago

3 0

Answer:

Usually involves the removal of

vegetative or non-endospore forming pathogens.

Explanation:

Usually involves the removal of

vegetative or non-endospore forming pathogens.

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How much copper is present in a cube that measures 3.20cm on each side, if the density of copper is 8.96 g/mL

Ainat [17]

Answer:

290.32 g

Explanation:

First we <u>calculate the volume</u> of the cube:

Volume = (3.20 cm)³ = 32.768 cm³

Now we <u>convert cubic centimeters to mililiters</u>:

32.768 cm³ * 1 mL / 1 cm³ = 32.768 mL

Finally we <u>calculate the mass</u>, using the <em>equation for density</em>:

Density = mass / Volume

mass = Density * Volume

mass = 8.86 g/mL * 32.768 mL = 290.32 g

7 0

3 years ago

Landslides and slumps are forms of ?

masha68 [24]

Landslides and slumps are forms of mass movements. Types of erosion both move, in different ways. In slumps, land breaks off in one piece, or chunk. Landslides are when rocks and dirt rapidly move down a slide.

5 0

3 years ago

Which of the following equations is balanced correctly and has the correct products for the reactants RbNO3 and BeF2?

Pavel [41]

Answer:

2RbNO₃ + BeF₂ → Be(NO₃)₂ + 2RbF, because Be keeps a 2+ charge throughout the reaction

Explanation:

2RbNO₃ + BeF₂ → Be(NO₃)₂ + 2RbF, because Be keeps a 2+ charge throughout the reaction

Rb is a +1 cation, NO3 is a -1 anion, Be is a +2 cation and F is a -1 anion.

In writing an ionic compound the charge of the cation becomes the subscript of the anion and the charge of the anion becomes the subscript of the cation.

So the ionic compound formed between Be2+ and F- is BeF2. The ionic compound formed between Be2+ and NO3- is Be(NO₃)₂.

As there are two NO₃ on the product side it is balanced by writing a 2 coefficient before RbNO₃ on the reactant side.

And as there are two F on the reactant side it is balanced by writing a 2 coefficient before RbF on the product side.

5 0

3 years ago

If you hold a box with a mass of 50kg for 5 hours how much work have you done

lubasha [3.4K]

No work , because the object was not pushed,pulled,dropped,or picked up

8 0

3 years ago

6. How many moles of water would require 92.048 kJ of heat to raise its temperature from 34.0 °C to 100.0 °C? (3 marks)

scoray [572]

Taking into account the definition of calorimetry, 0.0185 moles of water are required.

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

<h3>Mass of water required</h3>

In this case, you know:

Heat= 92.048 kJ
Mass of water = ?
Initial temperature of water= 34 ºC
Final temperature of water= 100 ºC
Specific heat of water = 4.186 $\frac{J}{gC}$

Replacing in the expression to calculate heat exchanges:

92.048 kJ = 4.186 $\frac{J}{gC}$ × m× (100 °C -34 °C)

92.048 kJ = 4.186 $\frac{J}{gC}$ × m× 66 °C

m= 92.048 kJ ÷ (4.186 $\frac{J}{gC}$ × 66 °C)

<u><em>m= 0.333 grams</em></u>

<h3>Moles of water required</h3>

Being the molar mass of water 18 $\frac{g}{mole}$ , that is, the amount of mass that a substance contains in one mole, the moles of water required can be calculated as: