Help with this question please.

Answers

Answer 1

Answer:

There are 4 hydrogens on the right side $(2\mathrm H_2=4\mathrm H)$ , and 2 hydrogens on the left per molecule of $\mathrm H_2$ . To get the same number of hydrogens on both sides, the coefficient should be 2.

(Then the number of oxygens will be consistent, since $2\mathrm H_2\mathrm O$ contributes 2 oxygens, and so does $\mathrm O_2$ .)

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Name one other organ system that would be affected if you had no marrow. Explain.

Answers

Well... If the marrow is in your bone, I would say the Cardiovascular system or the Lymphatic system. Because the cardiovascular system pump blood through out the body.

basically all the organ systems
without the marrow there is nothing to support our body

Are all living things made up of two or more cells true of false

Answers

It is true. A cell is the fundamental unit of life. All living things are composed of cells. Anything without cell are not living things.

The answer is True. Hoped I helped. :)

Thermal energy is transferred as heat from a warmer object to a cooler object until Select one: a. all of the energy from the hot object is transferred to the cold object. b. the temperature is the same in both objects. c. all of the energy from the cold object is transferred to the hot object. d. the thermal energy is converted into another type of energy such as light.

Answers

Answer: Option B

Explanation:

When the thermal energy is transferred from a hotter body to the colder body then the transfer of energy takes place until the temperature of both the objects are same.

The energy from the hotter body is transferred to the colder body. Example: The heat transfer from the hotter water takes place into the colder water.

The energy transfer will stop only when the temperature of both the water will be same.

I'm like 98% it's D.

Adam's dad takes the parkway to work. It takes him 45 minutes to travel from mile marker 145 where he enters the parkway to his exit at mile marker 98. What is his average speed?1. 62.7 mph

2. 47 mph

3. 1 mph

4. 193.3 mph

Answers

speed=distance/time

see his distance

distance is from 145 to 98
145-98=47 miles

time
60 mins per hour
45 mins =time
time=45/60 hours=0.75 hours

47 miles per 0.75 hours
47/0.75=62.6666666 mph

first one is option

The rate at which work is done is called

Answers

Answer:

The rate at which work is done is called Power.

Explanation:

Power is work done per unit time. or it can also be defined as ratio of work done to time taken to complete the work.

Mathematically the power (P) is given as:

$Power(Watts)=(W(Joules))/(T(seconds))$

1 watt = 1 Joule/second

Where:

W = Work done in time T.

T = Time taken to complete the work

The rate at which work is done is called Power.

Power is the rate at which work is done, measured in Joules per second

Label the samples based on their pH levels

Answers

Final answer:

In Chemistry, pH levels can be determined using acid-base indicators or pH paper which change color to reflect the acidity or alkalinity of a solution. Substances with pH less than 7 are acidic, while those with pH over 7 are basic. The concentration of hydrogen ions can also be used to determine pH.

Explanation:

The pH level of a substance can be determined using acid-base indicators or pH paper which change color in relation to the acidity or alkalinity of the solution. The pH scale measures from 0 to 14, with 7 being neutral. Anything below 7 is considered acidic, and anything above 7 is basic or alkaline. For example, if using pH paper or an indicator, a solution that colors the paper or indicator red or orange is likely to be acidic, whereas a green or blue color suggests a basic solution. The specific color can provide a rough estimate of the pH value, with some indicators or pH papers providing more precise value ranges.

Another method to measure pH is by examining the concentration of hydrogen ions in the solution. A lower pH value indicates a higher concentration of hydrogen ions, making the solution more acidic. Conversely, a higher pH value indicates a lower concentration of hydrogen ions, making the solution more basic or alkaline.

Learn more about pH levels here:

brainly.com/question/12086721

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lemon juice, gastric juice and tomato juice are acidic, bleach and baking soda are alkaline and salt solution is neutral

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A mass of gas under constant pressure occupies a volume of 0.5 m3 at a temperature of 20 degree Celsius. Using the formula for cubic expansion, what will be the volume at a temperature of 45 degree Celsius without a change in pressure?A) 0.5228938 m3 B) 0.0228938 m3 C) 0.5457875 m3 D) 0.0457875 m3