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3 years ago

According to the law of conservation of mass, three atoms of calcium can react to produce six atoms of calcium.

2 answers:

6 0

The law states that the total mass before a chemical reaction is the same as the total mass after a chemical reactionExothermic reactions do not require any activation energy.

rodikova [14]3 years ago

5 0

Answer:

According to the law of conservation of mass, the masses of the products and reactants must be the same. Adding calcium to the product side is considered a mistake if it is not in the reactant side of a particular chemical equation because it is impossible to produce calcium from thin air (unless this is a nuclear reaction).

Explanation:

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Flexibility exercises will increase flexibility but will not necessarily improve cardiovascular fitness is an example of the pri

Sphinxa [80]

False, the given statement is not an example of the Principle of specificity.

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2 years ago

The size of the human genome is 3.2x109bp. The 3.2kb long fragment is to be amplified by Polymerase Chain Reaction (PCR) using t

marusya05 [52]

20 cycles of PCR is necessary for the amplification target sequence

Mass is proportional to sequence length.

Let one base pair have mass M.

Thus,

$3.2*10^9 bp$ will have mass $(3.2*10^9) * M$

And the 3.2kb target will have a mass of

For the total amount of amplified target sequence to constitute 50% (by mass) of the total DNA in the reaction mixture, it has to be amplified to such an extent that the total mass of the amplicon matter is also $(3.2 * 109) * M$

PCR amplification happens geometrically, doubling the DNA target with each cycle.

Thus, if the number of cycles in N,

Then,

$(3.2 * 10^9) x M = 3.2 x 1000 x M x (2)N\\\\or 10^6 = (2)^N\\\\or 6 = N log2\\\\or N = \frac{6}{log2} = 20$

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4 0

3 years ago

The nurse is preparing to ambulate a client with Parkinson's disease who has recently been started on levodopa/carbidopa. Before

Naddik [55]

The most important assessment in this client's plan of care will be to check the orthostatic that is the postural vital signs of the patient.

What are vital signs?

Your heartbeat, breathing rate, body temperature, and blood pressure are all examples of vital indicators that represent important bodily processes. Your degree of physical functioning may be assessed by your healthcare professional by watching, measuring, or monitoring your vital signs.

With age, sex, weight, activity capacity, and general health, normal vital signs alter.

While at rest, the typical healthy adult's normal vital sign ranges are:

- 90/60 mm Hg to 120/80 mm Hg for blood pressure

- 12 to 18 breaths per minute are taken in

- 60 to 100 beats per minute for the pulse

- 97.8°F to 99.1°F (36.5°C to 37.3°C); average temperature of 98.6°F (37°C)

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2 years ago

The average American adult needs ____ hours of sleep a night, and actually averages about ____ hours.

lara [203]

Answer:

The average American adult needs at least 7 hours of sleep a night, and actually averages about 6-10 hours

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2 years ago

Explain the mnemonic sample used to gather medical and trauma history

Lynna [10]

Answer and Explanation:

SAMPLE history is a mnemonic acronym to remember key questions for a person's medical assessment. The SAMPLE history is sometimes used in conjunction with vital signs and OPQRST. The questions are most commonly used in the field of emergency medicine by first responders during the secondary assessment.

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3 years ago