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MissTica
3 years ago
10

How many significant digits are there in the measurement 50,600 mg A)4 B)5 C)6 D)7

Chemistry
2 answers:
Arte-miy333 [17]3 years ago
7 0

Five. The measurement 50,600 mg has five significant digits.

I presume that you are using the comma as a decimal separator.

The <em>rules for significant figures</em> are
1. Nonzero digits are always significant.
2. Any zeros between two significant digits are significant.
3. Final or trailing zeros are significant only if they are to the right of a decimal point.

• According to Rule 1, the <em>5 and 6</em> are significant.
• According to Rule 2, the <em>0 between the 5 and 6</em> is significant
• According to Rule 3, the <em>final two zeros</em> are significant.

Thus, there are five significant digits in the measurement 50,600 mg.

Note: If the comma is a thousands separator, the number has only three significant digits.

stellarik [79]3 years ago
3 0

Answer:

5.

Explanation:

Significant figures may be defined as the numbers of the digit that can carry to contribute the meaning of the exact measurement resolution. Significant figures follows some specific scientific rules.

All non zero digits are significant figures. The zeros that are present between the non zero digits are significant figures. The zeros that are present after the significant figures are considered as significant. Here, 5 significant figures are 5,0,6,0 and 0. Hence, the total significant figures are 5.

Thus, the correct answer is option (B).

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A 40.0 mL sample of 0.18 M HCI is titrated with 0.36 M CoHsNH2. Dctermine the pH at these points: At the beginning (before base
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Answer:

at the beginning:

pH = 0.745

Explanation:

HCl is a strong acid, so:

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       0.18 M             0.18        0.18.....equilibrium

before base is added:

∴ [ H3O+ ] ≅ <em>C </em>HCl = 0.18 M

⇒ pH = - Log [ H3O+ ] = - Log ( 0.18 )

⇒ pH = 0.745

8 0
3 years ago
How many elements are found in the following chemical equation? K + Cl → KCl A. 1 B. 2 C. 3 D. 0
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5 0
3 years ago
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The molar mass of glucose is 180.2 g/mol. How many grams of glucose will be produced when 132.0 g of CO2 reacts with an excess o
andriy [413]

Answer:

The mass in grams of glucose produced when 132.0 g of CO2 reacts with an excess of water is 90.1 grams

Explanation:

The chemical equation for the reaction is

6H₂O + 6CO₂  → C₆H₁₂O₆ + 6O₂

From the reaction, it is seen that 6 moles of H₂O reacts ith 6 moles of CO₂ to produce 1 mole of glucose  C₆H₁₂O₆ and 6 moles oxygen gas

The molar mass of CO₂ = 44.01 g/mol

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and since the molar mass (or the mass of one mole) of C₆H₁₂O₆ is 180.2 grams/mole then 0.5 mole of C₆H₁₂O₆ will have a mass of

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7 0
3 years ago
If an atom has sp3d2 hybridization in a molecule:
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b. the maximum number of p-p bonds that the atom can form is 2

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