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ratelena [41]
3 years ago
14

How many significant digits does the number 700 have?

Chemistry
2 answers:
OLga [1]3 years ago
5 0

Answer: 700 has one significant figure which is 7.

Explanation: These are some rules for significant figures

•All non-zero digits are significant: 1,2,3,4,5,6,7,8,9

•Zero between non-zero digits are significant: They are three significant figures in 203.

•Leading zeros are not significant: There are two significant figures in 0.56.

•Trailing zero to the right of decimal are significant. There are four significant figures in 62.00

•Trailing zeros in a whole number with the decimal shown are significant: This makes "700." three significant figures.

•Trailing zeros in a whole number with no decimal shown are not significant: This makes 700 one significant figure.

Snezhnost [94]3 years ago
4 0

Answer: In the number 700 there is only one significant figure.

Explanation:

How do I know this? Well, ya see, 7 is a nonzero digit. So, since it is a non zero digit, the significant digit of 700 is 7. To determine what numbers are significant and which aren't, use the following rules:

The zero to the left of the decimal value less than 1 is not significant.

All trailing zeros that are placeholders are not significant.

Zeros between non zero numbers are significant.

All non zero numbers are significant.

If a number has more numbers than the desired numbers of significant digits, the number is rounded. For example, 432,500 is 433,000 to 3 significant digits.

Zeros at the end of numbers which are not significant but are not removed, as removing would affect the value of the number. In the above example, cannot remove 000 in 433,000 unless changing the number into scientific notation.

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Aww man, I love these types of problems!!!
So, it's a simple formula:
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In this case, we remove V(volume) as there is none listed, leaving this:
P1/T1=P2=T2

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VMariaS [17]
The correct answer should be Letter B
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Minerals are _________ inorganic _________ that usually possess a crystalline structure and can be represented by a chemical for
ladessa [460]

Answer:

The corect answer is c) naturally occurring; solids

Explanation:

Minerals exists as solid substances in nature consisting of one or more element chemically combined together formiming compounds with definite composition. As mentioned earlier single elements can form minerals and  examples of single element mineral are Silver, Carbon and Gold which are found in nature in their pure form and are mined.

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7 0
3 years ago
. In a titration, a 25.0 mL sample of 0.150 M HCl is neutralized with 44.45 mL of Ba(OH)2. a. Write the balanced molecular equat
choli [55]

Answer:

Equation of reaction:

a) 2HCl + Ba(OH)2 ==> CaCl2 + 2H2O

b) Molarity of base = 0.042 M.

Explanation:

Using titration equation

CAVA/CBVB = NA/NB

Where NA is the number of mole of acid = 2

NB is the number of mole of base = 1

CA is the molarity of acid =0.15M

CB is the molarity of base = to be calculated

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VB is the volume of base = 44.45mL

Substituting

0.15×25/CB×44.45 = 2/1

Therefore CB =0.15×25×1/44.45×2

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Answer:

Dilute

Explanation:

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