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kirill115
1 month ago
9

1.50μm2. Convert this to square meters.

Chemistry
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Compute 4.659×104−2.14×104. Round the answer appropriately.
lions [2927]

Answer: 25,200.


Explanation:


1) Starting with: 4.659 × 10⁴ - 2.14 × 10⁴


2) Significant figures need to be considered.


Because the powers are equal (10⁴), the decimal values can be subtracted directly. However, it is essential to first check significant figures and the count of decimal places.


3) The figure 4.659 × 10⁴ has four significant digits (4, 6, 5, and 9), whereas 2.14 × 10⁴ contains three significant digits (2, 1, and 4).


4) When adding or subtracting values with a different number of decimal places, the answer must reflect the same number of decimal places as the number with the least amount of decimal precision.


5) Prior to performing subtraction, it is necessary to round the numbers to the least decimal places. Given that 2.14 has two decimal places and 4.659 has three, round 4.659 to 4.66.


6) Now perform the subtraction 4.66 - 2.14 = 2.52


7) Then multiply by the power of 10: 2.52 × 10⁴ = 25,200. This is the final answer.

5 0
2 months ago
Read 2 more answers
You have 125 g of a certain seasoning and are told that it contains 62.0 g of salt. what is the percentage of salt by mass in th
KiRa [2933]
62.0g divided by 125g equals 0.496, then multiplied by 100 gives 49.6%.
4 0
3 months ago
Nicole has 2 glasses on the counter: one of water and one of sugar. She is baking a cake and needs to use the sugar-water for th
Alekssandra [3086]

Answer:Sugar-water is a mixture

Explanation:

If it consists of pure sugar, it's classified as neither; however, when mixed with water, it forms a homogeneous mixture.

8 0
3 months ago
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Según la Organización Mundial de la Salud, el nitrato de plata ( densidad = 4.35 g/cc ) es una sustancia con propiedades cáustic
castortr0y [3046]

Respuesta:

737.52 mL de agua

Justificación:

En este escenario, es necesario aplicar la fórmula de molaridad de una solución, que es:

M = moles / V

Donde:

V: Volumen de la solución.

Ya que deseamos determinar la cantidad de agua, en otras palabras, buscamos el volumen del solvente que se utilizó para crear los 800 mL de la disolución.

Una disolución se compone de un soluto y un solvente. El soluto que tenemos es nitrato de plata. Utilizando la fórmula mencionada, calculamos los moles de soluto y luego su masa. Tras eso, calculamos el volumen a partir de la densidad y, al final, determinamos la cantidad de solvente de esta manera:

V ste = Vsol - Vsto

Primero, vamos a calcular los moles de soluto:

moles = M * V

moles = 2 * 0.800 = 1.6 moles

Con este número de moles, obtenemos la masa utilizando el peso molecular que es 169.87 g/mol:

m = moles * PM

m = 1.6 * 169.87 = 271.792 g

Usando el valor de densidad, procederemos a calcular el volumen de soluto utilizado:

d = m/V

V = m/d

V = 271.792 / 4.35

V = 62.48 mL

Por último, la cantidad de agua requerida es:

V agua = 800 - 62.48

V agua = 737.52 mL

8 0
3 months ago
What is the length of inches of a 100 meter soccer field and i need answer in scientific notation
VMariaS [2998]

The soccer field's length is 3.94 × 10^2 in.

Length = 100 m × (39.37 in/1 m) = 394 in = 3.94 × 10^2 in

4 0
3 months ago
Read 2 more answers
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