Description : What weight of Na will contain the same number of atoms as are present in 2.4 gm of carbon? -Chemistry 9th
Last Answer : 1 mole of Carbon has weight 12g. So 0.2 mole of Carbon will have weight 2.4 g. Now, 1 mole of Carbon contains 6.022 10^23 atoms So 0.2 moles of Carbon contains 1.2044 10^23 atoms. So we need to find the weight ... of Na. 1 mole of Na = 23 g So 0.2 mole of Na = 4.6 grams So, answer is 4.6 grams.
Description : How many atoms are represented by the symbol Na?
Last Answer : The symbol Na represents the element sodium.
Description : Which one of the following pairs of atoms would form a non-polar covalent bond? A C and O B N and O C Cl and Cl D Na and Cl E Ne and Ne
Last Answer : C Cl and Cl
Description : why is the periodic table symbol for sodium, Na ?
Last Answer : Many of them, like lead (Pb) are named after their latin roots.
Description : What Sodium (Na) and water (H2O) undergo a chemical reaction that produces sodium hydroxide (NaOH and hydrogen gas (H2). Which equation represents this chemical reaction?
Last Answer : 2Na+2H20->2Na0H+H2 ::::apex
Description : Why is Magnesium (Mg) located to the right of sodium (Na)?
Last Answer : Need answer
Description : What is the mass in grams of 0.0135 of the element sodium Na?
Last Answer : What is the answer ?
Description : How many dots are around the Na in the Lewis symbol for an neutral atom of Sodium?
Description : What make H2CO3. Ans you can make H2CO3 by CO2 plus H2O H2CO3 if you want to make sodium hydrogen carbonate then you can make it like this Na plus H2CO3 NaHCO3?
Last Answer : The correct chemical equation is:Na2CO3 + CO2 + H2O = 2 NaHCO3
Description : Rank the following laboratory tests and procedures in terms of their relative value to a 65-year-old woman who is to undergo elective resection of a sigmoid cancer. A. Carcinoembryonic antigen (CEA). B. ... Arterial blood oxygen tension (PaO 2) on room air. G. Serum sodium concentration (Na+).
Last Answer : Answer: CDFEBAG DISCUSSION: The most important test by far is the electrocardiogram, with its capacity to indicate signs of occult heart disease. The second most important evaluation is the hemoglobin ... for resection of the colon is always normal and would be of least value among these tests
Description : Which of the following can be purified by the electrolytic method? (a) Sodium (Na) (b) Copper (Cu) (c) Boron (B) (d) Chlorine (C12)
Last Answer : Ans:129
Description : Which of the following is incorrect? (a) Mercury: Hg (b) Silver: Ag (c) Sodium: Na (d) Potassium: Ka
Last Answer : Ans:(d)
Description : Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is (a) Na(s) + 2H20(l) → 2NaOH(aq) + 2H2(g) (b) 2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g) (c) 2Na(s) + 2H20(l) → NaOH(aq) + 2H2(g) (d) 2Na(s) + H20(l) - 2NaOH(aq) + 2H2(g)
Last Answer : Answer: (b)
Description : True statements about aldosterone include: a. it increases the amount of Na+-K+ ATPase in the target cells b. it reduces the sodium content of the sweat c. it increases the acidity of urine d. all above
Last Answer : all above
Description : The exchangeable sodium ratio (ESR) can be calculated as ESR = Exchangeable (C2+ + Mg2+)/Exchangeable Na+ ESR = Exchangeable Na+ / ESR = Exchangeable Na+ / Exchangeable (Ca2+ + K+) ESR = Exchangeable Na+ / Exchangeable (Ca2+ + Mg2+)
Last Answer : ESR = Exchangeable Na+ / Exchangeable (Ca2+ + Mg2+)
Description : Sodium adsorption ratio (SAR) can be calculated by using of formula (a) SAR = Na+ / (b) SAR = Na+ / (c) SAR = Ca2+ + Mg2+ / (d) SAR = Na+ /
Last Answer : (b) SAR = Na+ /
Description : What is the name and chemical formula of the main product formed by heating baking soda. (a) sodium carbonate,Na 2 CO 3 (b) Bleaching powder ,CaOCl 2 (c) sodium chloride,Na Cl (d)Plaster of paris ,CaSO 4 .I/2H 2 O
Last Answer : (a) sodium carbonate,Na 2 CO 3
Description : The success of oral rehydration therapy of diarrhoea depends upon the following process in the intestinal mucosa: A. Sodium pump mediated Na+ absorption B. Glucose coupled Na+ absorption C. Bicarbonate coupled Na+ absorption D. Passive Na+ diffusion secondary to nutrient absorption
Last Answer : B. Glucose coupled Na+ absorption
Description : Sodium valproate has been shown to: A. Prolong neuronal Na+ channel inactivation B. Attenuate ‘T’ type Ca2+ current in neurones C. Inhibit degradation of GABA by GABA-transaminase D. All of the above
Last Answer : D. All of the above
Description : An aqueous solution of sodium chloride is prepared by dissolving 10kg of sodium chloride in 50 kg of water find (i) Weight % (ii) Mole % of solution. [Atomic weight of Na = 23, Cl = 35.5]
Last Answer : Weight of NaCl = 10 kg Weight of H2O = 50 kg Total weight = 60 kg Weight % of NaCl = (10/ 60) * 100 =16.67% Weight % of H2O = (50/ 60) * 100 = 83.33% Molecular weight of NaCl = 58.5 k moles of NaCl ... 100 = 5.79% Mol % of H2O = (moles of H2O / Total moles)*100 = (2.78/ 2.949)*100 = 94.26%
Description : What is the ground-state configuration for Na+? The atomic atomic number for sodium is eleven.
Last Answer : ANSWER: 1S22S22p6
Description : If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 gmol how many sodium atoms are there in the sample?
Description : What is the mass in grams of 9.76 x 1012 atoms of naturally occurring sodium?
Last Answer : The mass is 1,62.10e-11.
Description : How many sodium atoms are there?
Last Answer : 1, because Na does not have a number after it.
Description : What chemical compound is formed when sodium atoms combine with hydroxide groups?
Last Answer : A group hydroxide doesn't exist.
Description : How many sodium atoms are there in 100.0 g of sodium?
Last Answer : 4
Description : How many sodium atoms are represented in 15.59g of sodium phosphate,Na3PI4?
Last Answer : I cannot answer this question.
Description : Atoms like sodium and lithium often lose electrons, which makes them?
Last Answer : cations
Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.
Description : Which of the following atoms or ions would be the smallest? w) sodium atom x) magnesium atom y) singly charged sodium ion z) doubly charged magnesium ion
Last Answer : ANSWER: Z -- DOUBLY CHARGED MAGNESIUM ION
Description : Which one of the following atoms has two unpaired electrons in its ground state: w) Sodium x) Calcium y) Oxygen z) Aluminum
Last Answer : ANSWER: Y -- OXYGEN
Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum