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melamori03 [73]
3 years ago
14

Diseases can spread rapidly in cities. If a disease kills many people in a city but fewer in a rural area, this is an example of

Chemistry
1 answer:
Inga [223]3 years ago
5 0

Answer:

Density independent factor

Explanation:

in dense areas where people livein  very close and tight spaces

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This is part two of the other questions
Brums [2.3K]

Answer:

The answer to your question is below

Explanation:

11. Alkali metals

12. Halogens

13. Transition metals

14. Halogens

15. Noble gases

16. Alkaline earth metals

17. Transition metals

18. Alkaline earth metals

19. Transition metals

20. Alkali metals

21.- Periods

22.- Calcium

23.- Iodine, I

24.- A. atomic number

8 0
3 years ago
What is the concentration of a sodium hydroxide solution if 14.5 mL of it are exactly neutralized by 30.0 mL of a 0.500 M hydroc
rusak2 [61]

Answer:

1.03 M

Explanation:

Step 1: Write the balanced equation

NaOH + HCl ⇒ NaCl + H₂O

Step 2: Calculate the reacting moles of HCl

30.0 mL (0.0300 L) of 0.500 M HCl react.

0.0300 L × 0.500 mol/L = 0.0150 mol

Step 3: Calculate the moles of NaOH that react with 0.0150 moles of HCl

The molar ratio of NaOH to HCl is 1:1. The moles of NaOH that react are 1/1 × 0.0150 mol = 0.0150 mol.

Step 4: Calculate the molar concentration of NaOH

0.0150 moles of NaOH are in 14.5 mL (0.0145 L).

M = 0.0150 mol/0.0145 L = 1.03 M

4 0
3 years ago
A 135-g sample of a metal requires 2.50kj to change its temperature from 19.5 degrees Celsius to 100.0 degrees Celsius. What is
PolarNik [594]
Q = m x c x ΔT

2500 = 0.135 x C x 80.5

2500 = 10.8765 x C

C = 230.043 J/Kg.K

hope this helps
7 0
3 years ago
Read 2 more answers
What is the molarity of solution prepared by dissolving 11.75 g of KNO3 in enough water to produce 2.00 L of solution?
zysi [14]
The molar mass of the compound potassium nitrate, KNO3 is equal to 101.1032 g/mol. Then, we determine the number of moles present in the given amount,
                       n = 11.75g / (101.1032 g/mol) = 0.116 mol
Then, molarity is calculated by dividing the number of moles by the volume of the solution. The answer is therefore 0.058 M. 
3 0
3 years ago
2. Which energy source is considered a non-renewable resource?
Keith_Richards [23]

Answer:

The answer is D

Explanation:

Although natural processes continually form fossil fuels, such fuels are generally classified as non-renewable resources because they take millions of years to form and the known viable reserves are being depleted much faster than new ones are being made. ... The use of fossil fuels raises serious environmental concerns.

BRAINLIEST PLZ

8 0
3 years ago
Read 2 more answers
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